ses-enser - 2402 combustible g c 2 c toxic gas...

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INSTRUCTION MANUAL

Software Revision Card 3.2

DOCUMENT SES-KS-2402-04-07-E REV. 3

22440022 –– 22440044 –– 22440077 -- 22 CCHHAANNNNEELLSS CCAARRDDSS SSEESS--AASSAA EENNGGIINNEEEERRIINNGG

Page 2 of 32 2402-2404-2047 INSTRUCTION MANUAL - SES-KS-2402-04-07-E Rev.3

SSEESS--AASSAA EENNGGIINNEEEERRIINNGG 22440022 –– 22440044 –– 22440077 -- 22 CCHHAANNNNEELLSS CCAARRDDSS

2402-2404-2047 INSTRUCTION MANUAL - SES-KS-2402-04-07-E Rev.3 Page 3 of 32

Information and relevant technical data contained in this manual are Copyrighted and property of SES ASA ENGINEERING S.R.L. This manual and relevant drawings cannot be used for purpose of manufacturing anything represented, nor disclosed to third parties without written approval of SES ASA ENGINEERING S.R.L. SES ASA ENGINEERING S.R.L will protect its own rights with legal means. SES ASA ENGINEERING S.R.L reserves the right to modify specifications and drawings without notice.

WARRANTY SES ASA ENGINEERING S.R.L guarantees all of its products are free from manufacturing defects for a period specified in each data sheet or agreed upon with the customer. SES ASA ENGINEERING S.R.L will repair or replace at its workshop, free of charge, every instrument found to be defective during the warranty period. Technical personnel of SES ASA ENGINEERING S.R.L will determine the cause of damage. In any case the warranty is restricted to the cost of the instrument supplied by SES ASA ENGINEERING S.R.L. The customer will take the responsibility for any improper use of the instrument carried out by own or authorised personnel.



TABLE OF CONTENTS 1. INTRODUCTION................................................................................................................................... 5 1.1. General ................................................................................................................................................. 5 1.2. Block Diagram....................................................................................................................................... 6

2. SPECIFICATIONS ................................................................................................................................ 7 2.1. Specifications of Board 2402 or 2404 or 2407 ..................................................................................... 7 2.2. Mechanical Specifications .................................................................................................................... 7 2.2.1. Board .............................................................................................................................................. 7 2.2.2. Rack................................................................................................................................................ 7 2.3. Electrical Specifications ........................................................................................................................ 8 2.3.1. Board Power Requirements ........................................................................................................... 8 2.3.2. Input Signals ................................................................................................................................... 8 2.3.3. Auxiliary OC Output Signals ( 30Vdc@0,1A max.) per each Channel: ......................................... 8 2.3.4. Relay Output Signals...................................................................................................................... 8 2.3.5. Analog Input Accuracy:................................................................................................................... 8 2.4. Operating Conditions ............................................................................................................................ 9

3. INSTALLATION................................................................................................................................... 10 3.1. Handling and Shipping........................................................................................................................ 10 3.2. Installation........................................................................................................................................... 10 3.3. Installation of Sensors with Field Transmitter..................................................................................... 10

4. OPERATIVE INSTRUCTIONS............................................................................................................ 11 4.1. Operation ............................................................................................................................................ 11 4.1.1. Connector Connections to the Field ............................................................................................. 12 4.1.2. Connection to a Sensor with 4-20 mA Transmitter or Smart Sensor ........................................... 12 4.2. Setting and Operation of Auxiliary Outputs......................................................................................... 13 4.2.1. Fail to Safe.................................................................................................................................... 13 4.2.2. Operation of Alarm/Warning Auxiliary Outputs, in Flashing or Continuous mode ....................... 13 4.3. Front Keyboard ................................................................................................................................... 14 4.3.1. Procedures Executable from the Front Panel .............................................................................. 15 4.3.2. Flow Diagram of Front Keyboard Operating Modes..................................................................... 17 4.4. Use of Hand-Held Monitor .................................................................................................................. 19 4.4.1. Test Unit 2490 .............................................................................................................................. 19 4.4.2. Channel status check ................................................................................................................... 19 4.4.3. Modification of Warning threshold ................................................................................................ 20 4.4.4. Modification of Alarm threshold .................................................................................................... 21 4.4.5. Analogue Inputs Test.................................................................................................................... 22 4.5. Board Configuration ............................................................................................................................ 23 4.5.1. Switch Setting Table..................................................................................................................... 23 4.5.2. Jumper Setting Table ................................................................................................................... 23 4.5.3. Selection Card Type 2402 or 2404 or 2407 ................................................................................. 23 4.5.4. Selection input Type ..................................................................................................................... 23 4.6. Typical Connections (3-wires sensor) ................................................................................................ 24 4.7. Typical Connections (4-wires sensor) ................................................................................................ 25

5. MAINTENANCE .................................................................................................................................. 26 5.1. General ............................................................................................................................................... 26 5.2. Storage................................................................................................................................................ 26 5.3. Self-Calibration ................................................................................................................................... 26

6. DIAGNOSTICS.................................................................................................................................... 27 6.1. Board Diagnostics............................................................................................................................... 27 6.1.1. Diagnostics of Power Supplies and Microprocessor.................................................................... 27 6.1.2. Diagnostics of I/O Section ............................................................................................................ 28 6.2. Interpretation Codes ........................................................................................................................... 28 6.2.1. Error Codes .................................................................................................................................. 28 6.3. Troubleshooting .................................................................................................................................. 29 6.4. Spare Parts ......................................................................................................................................... 31

7. CARD LAYOUT................................................................................................................................... 32



1. INTRODUCTION 1.1. General Control unit 2402 or 2404 or 2407, a component of series F&G/ESD 2000, is designed for detection of toxic or combustible gas and vapour in air, such as: LPG (Butane / Propane), Methane, Hydrogen, Acetylene, Ethylene, Toluene, Carbon Monoxide, Ammonia, Hydrogen Sulphide, Oxygen, etc... . Control unit 2402 or 2404 or 2407 interfaces directly with transmitters-sensors with 0-22 mA current output or with Smart Sensors in any configuration, including Intrinsically Safe configuration. This exclusive feature allows the user to connect a wide variety of two, three or 4-wire transmitters available on the market. Using a single chip microprocessor, present in the entire 2400 family, gives more reliability and accuracy. The microprocessor allows the setting of alarm set points through software commands, instead of using potentiometers. A two-digit display indicates the detected combustible gas LEL (lower explosive limit) on a 00-99% LEL scale or toxic gas ppm (part per million) on a 00-99 ppm scale, or oxygen gas on a 00-25% Volume scale, and any error codes. The indicated concentration becomes flashing for LEL/ppm values over 99. The operating conditions (Alarm, Warning, Ready, Fault) can also be monitored through double LED indicators on front panel. The control unit sends both the analogue values and the status of the two input channels to the CPU (CPU Facility 2401) through a high-speed redundant RS 485 serial port. A complete self diagnosis, made possible by the microprocessor, allows supervision and control of board components functionality, correct operation of internal power supplies triggering, and in the case of failure activates the relevant malfunction outputs or Watchdogs. To increase the operational safety of the control unit, the logical section (including microprocessor, serial interfaces and internal power supplies) is galvanically isolated from the input/output section from/to the field by opto-isolators. The control unit makes available, on the connector, open collector outputs for warning, alarm and failure, configurable through DIP switches for FLASHING and NON-FLASHING modes. The board is fitted with a 32-pin DIN 41612 I/O connector.



1.2. Block Diagram



2. SPECIFICATIONS

2.1. Specifications of Board 2402 or 2404 or 2407

Application: Detection of Combustible, Toxic or Oxygen gases (together

with a sensor with 4-20 mA transmitter or Smart Sensor)

Measure Span 2402: 0-100% LEL (lower explosive limit) Measure Span 2404: 0-20, 0-50 or 0-100 ppm (part per million) Measure Span 2407: 0-25% Volume (depletion of Oxygen in air) N.° of Channels: 2 analogue inputs 0÷22mA Operating Environment: Safe area Warranty: 2 years of uninterrupted operation.

2.2. Mechanical Specifications 2.2.1. Board

Size: Double euro elongated 6U 19” Weight: 440 g Height: 233 mm Length: 220 mm Front Width: 5TE

2.2.2. Rack

Size: Standard 19” 6U Weight: 2600 g Width: 19” Height: 266 mm Depth: 283 mm



2.3. Electrical Specifications

Power Supply: 24Vdc (nominal), 20 to 30Vdc Fuse: 24Vdc ISO line: 500mA, Retard 24Vdc I/O line: 500mA, Retard

2.3.1. Board Power Requirements

Internal consumption: 24Vdc ISO line: Quiescent : 130mA Alarm : 140mA

24Vdc I/O line: Quiescent/Alarm: 50mA

(this value does not include consumption of the sensor with transmitter connected to the board.)

2.3.2. Input Signals Dual channel analogue signal 0÷22 mA (single point) 2.3.3. Auxiliary OC Output Signals ( 30Vdc@0,1A max.) per each Channel:

- Warning - Alarm - Fault - Fail to Safe for Alarm communication failure

or Calibration (selection by DP8-SW2) 2.3.4. Relay Output Signals Common and N.O. contact for Watchdog signal with capacity for resistive loads:

- 0,3A @ 250Vac - 0,3A @ 125Vdc - 1A @ 30Vdc

Note: the relay is normally energised. 2.3.5. Analog Input Accuracy:

≤ 2% FDS on input 0 to 22mA



2.4. Operating Conditions

Operating Temperature: 0°C to + 70°C (32 to +158°F) Storage Temperature: -40 to + 85°C (-40 to +185°F) Environment Humidity: 0% to 95% not condensing.

2.5 Front Panel Indications For each channel: Two digits displays (7 segments) for L.E.L. and/or error codes display

Redundant LED (red) for Alarm Redundant LED (red) for Warning Redundant LED (yellow) for Fault Redundant LED (green) for correct operation Ready

Common: Redundant LED (red) for serial line transmission (TX) Redundant LED (red) for serial line reception (RX) Redundant LED (yellow) for Watchdog (WD) active



3. INSTALLATION

3.1. Handling and Shipping Every piece of equipment supplied by SES ASA ENGINEERING S.R.L is packed in order to prevent physical damage. Carefully check the contents of any package when received. Any noticed inconsistency should be communicated to SES ASA ENGINEERING S.R.L within ten days from material reception. SES ASA ENGINEERING S.R.L will not be liable for any damage if this communication is not forwarded within the indicated terms. Any claims for damage will be communicated in writing form also to the carrier. Any written communication must include product model and serial number. 3.2. Installation Although 2400 modules are built to be free from electromagnetic interference’s, they should be installed in a place away from EMR sources such as motors, RF equipment, etc. Connection cables must be totally shielded and have a drain wire. The shield should be connected only to the safety panel end. If the modules are installed in enclosed places (cabinets), the maximum heat sink in accordance with available space should be considered, in order to avoid excessive overheating. A suitable ventilation system may have to be considered. SES ASA ENGINEERING S.R.L is at your complete disposal in supplying qualified experienced staff with the knowledge to review the plant feasibility. 3.3. Installation of Sensors with Field Transmitter The installation of the instruments in hazardous areas should be carried out in accordance with local safety regulations, technical and functional specifications of used equipment, making reference to the technical documentation for installation.



4. OPERATIVE INSTRUCTIONS

4.1. Operation At start up of board 2402, 2404 or 2407 the microprocessor inhibits outputs (Open Collectors) and displays on the front panel so that the initial undetermined logical status’s does not force any activation or signal in the system. The microprocessor ‘’reads’’ the configuration status of operating mode Dip-Switches, namely: - Card address - Activation mode (continuous or flashing) of Open Collector outputs - Possible use of sensors with transmitter with self calibration function - Set up of communication speed on serial line. To set these operating modes, please refer to section 4.5. The microprocessor verifies the data set up by the Dip-Switches and the card is configured with new parameters. After executing these preliminary checks, the detection system enters a waiting status of about 70 seconds or 140 seconds, the Ready LED of each channel starts flashing and on the display appears the “Su” message (System in Start-up mode). This wait is necessary to permit the field analogue line stabilisation. Then the card starts the operating mode, and the card display shows the detected gas concentration in % of L.E.L. (Lower Explosive Limit) or in ppm (part per million) or in % Volume (Oxygen) of any system or error codes (see 6.2). Open Collector outputs, front panel LED’s and watchdog relay are enabled.



4.1.1. Connector Connections to the Field Note: the watchdog relay is normally energised; so, during normal operation, this contact

will be closed (open in case of Fault). 4.1.2. Connection to a Sensor with 4-20 mA Transmitter or Smart Sensor The board is designed to be directly connected to both 3-wire and 4-wire 4-20 mA transmitters. The different types of transmitters and relevant connections are indicated in section 4.7 - Typical Connections.



4.2. Setting and Operation of Auxiliary Outputs The card 2402 or 2404 or 2407 has eight Open Collector outputs available on the connector:

CH1 CH2 OC1 = Alarm OC2 = Warning OC3 = Fault OC4 = Calibration/Fail to Safe

OC5 = Alarm OC6 = Warning OC7 = Fault OC8 = Calibration/Fail to Safe

The calibration output (O.C.) is activated by a signal from the Smart Sensor (if this function is available) for automatic calibration. 4.2.1. Fail to Safe In case of communication failure between Gas input card and CPU, logic micro operates the FAIL-TO-SAFE condition directly by local micro firmware output. In case of Alarm, input card transmit the Alarm status to 2401-CPU Facility Card, but if the input card don’t receive the call back signal, that confirm the successful operation, it will activate the O.C. dedicated to Fail to Safe (Alarm communication failure). For the Selection of Fail-to-Safe mode see paragraph 4.5. 4.2.2. Operation of Alarm/Warning Auxiliary Outputs, in Flashing or Continuous mode If SW2-6 is set to ON, in case of Warning or Alarm, O.C. outputs will be activated flashing. Alarm, Warning signals and front panel LED’s will set to continuous pressing ACK button on the CPU Facility. Their deactivation is conditioned to the removal of the Alarm cause, or to pressing RESET the button on the Facility 2401, if is set the ISA-2C sequence. If SW2-6 is set to OFF, in case of Warning or Alarm, O.C. outputs will be activated continuously (to deactivate act as described above).



4.3. Front Keyboard

2402%L.E.L.

ALARM

WARN

READY

FAULT

ALARM

WARN

READY

FAULT

TX

RX

WD

SEL

TESTSET

INH

2404p p m

ALARM

WARN

READY

FAULT

ALARM

WARN

READY

FAULT

SEL

TESTSET

INH

2407% O

ALARM

WARN

READY

FAULT

ALARM

WARN

READY

FAULT

SEL

TESTSET

INH

%L.E.L. p p m

2

% O 2

ALARM Indication (double red LED) - CH1 AlarmWARNING Indication (double red LED) - CH1 WarningREADY Indication (double green LED) - CH1 ReadyFAULT Indication (double yellow LED) - CH1 Fault

7 Segment Each Display for Value Reading on CH2

ALARM Indication (double red LED) - CH2 AlarmWARNING Indication (double red LED) - CH2 WarningREADY Indication (double green LED) - CH2 ReadyFAULT Indication (double yellow LED) - CH2 Fault

7 Segment Each Display for Value Reading on CH1

TX

RX

WD

TX

RX

WD

TX Indication (double red LED) of Serial Line TransmissionRX Indication (double red LED) of Serial Line ReceiveWD Indication (double yellow LED) of WatchDog Control (Instrument Ready)

FRONT BUTTONSSee paragraf 4.3.1 - Procedures executable from the front panel

25 Pins, DB Connector, for Hand Held Monitor 2490.

H

H

M

H

H

H

H

MM



4.3.1. Procedures Executable from the Front Panel These procedures can be activated through the front panel pushbuttons: 1. Display of Warning and Alarm set points. 2. Channel shutdown (permanent inhibition) 3. Test. Display of warning and alarm set points

a) Press SEL button: the first channel display will show SE (Selection) and the READY LED will flash.

b) Press SET button: the WARNING LED will start flashing and the display will still

indicate the Warning threshold value. c) Press SET again: WARNING LED will turn off and ALARM LED will flash. The

display will indicate the Alarm threshold value. d) Press SEL: the first channel READY LED will change to continuous and the

relevant display will show again the value read from LEL. The second channel READY LED will flash and the relevant display, will show code SE (Selected).

e) Repeat action b) and c) to see the Alarm set points. f) Press SEL: the second channel READY LED will change to continuous and the

relevant display will show again the value read from LEL. Note: If the signal procedure for a channel is not completed, about 20 seconds after

the last button has been pressed the system automatically switches to normal operating mode.

Channel shutdown (permanent inhibition)

a) Press SEL button: once to select channel 1, twice for channel 2. b) After selecting the desired channel press INH: the display will deactivate while

the relevant READY LED will blink, confirming the channel has been inhibited. c) Press SEL to deselect the channel; READY will turn off too. Note: the signal Card inhibition will remain active till the card is powered on. After a

power shut-down, the channels will return active at system powering on.



Restoring of Inhibited Channel

a) Select the desired channel pressing SEL. b) The relevant READY LED will blink. c) Press INH: the display will indicate SE (Selection) d) Press SEL: the display will indicate the LEL value of the restored channel.

Test

Pressing TEST button, ALARM, WARNING, READY and FAULT LED’s of both channels flash for 5 seconds to check they are working correctly. Also the two digits display flashes with all segments. The microprocessor also carries out a self test to check operation of each channel directly forcing the analogue input to a pre-set value, checking its correlation and the amount of any error, then verifying the analogue and digital circuit of each input channel. Any malfunction detected is signalled to the CPU Facility that will display or print out the detected malfunction.



4.3.2. Flow Diagram of Front Keyboard Operating Modes Cycle for Display of Warning and Alarm Thresholds



Cycle for Channel Inhibition



4.4. Use of Hand-Held Monitor 4.4.1. Test Unit 2490 The H.H.M. 2490 unit allows access to some special operating modes not accessible from the board front controls. This device, powered and controlled by the board, is automatically configured when the 25-pin connector is inserted in the special receptacle on the front panel. After connecting the Hand-Held Monitor the initialisation message is displayed: SES-ASA 2402 r 3.2 (resident software revision number) Card Address 000 (board addressing number – from 0 to 254) HAND HELD MONITOR INFO SETP RAMP

and these functions are available:

• Card address check-test • Latch/No Latch status check and channel set-point check • Modification of Warning threshold • Modification of Alarm threshold • Analogue inputs test

NOTE: If there is any Warning or any Alarm, the display will show this message: SES-ASA 2402 r3.2 Card Address 000 HAND HELD MONITOR -KEYS NOT AVAILABLE-

This message informs the operator that the H.H.M. will not function, until the status of the channels will return to the Ready mode. 4.4.2. Channel status check 1. From the main menu press function key F1 (INFO). The display will show this

message: WRN LAT ALM LAT 10 no 15 no CH1 20 yes 25 yes CH2 %LEL %LEL

This screen shows the set points of the two input channels, reporting their LATCH/NO

LATCH status. 2. Press Enter to return to the main menu. The menu will automatically return to main

menu after 10” of inactivity.



4.4.3. Modification of Warning threshold 1. From the main menu press function key F2 (SETP). The display will show this

message: SES-ASA 2402 r3.2 Card Address 000 Hand Held Monitor WARN ALAR

2. From this menu press function key F1 (WARN). The display will show this message: SES-ASA 2402 WARNING CH1_10 %LEL WARNING CH2 20 %LEL CH1 CH2

The underscore symbol “_” will be on the row of the selected channel Values “10” and “20” (e.g.) are the set threshold points.

2. Select the wanted channel pressing F1 (CH1) and F2 (CH2) buttons. The “_” symbol

will be on the row of the selected channel. 3. Modify the threshold value by pressing arrows “↓” and “↑”. 4. Press Enter to return to the previous menu.

Note: If the Warning threshold is higher than the Alarm threshold the display will show

this message:

-------------------- INPUT VALUE ERROR : DATA NOT CHANGED --------------------

The card will ignore the new value and will maintain the old one. This message will last for 3 sec, then the display will automatically return to the main

menu.



4.4.4. Modification of Alarm threshold 1. From the main menu press function key F2 (SETP). The display will show this

message: SES-ASA 2402 r3.2 Card Address 000 Hand Held Monitor WARN ALAR

2. From this menu press function key F2 (ALAR). The display will show this message: SES-ASA 2402 ALARM CH1_15 %LEL ALARM CH2 25 %LEL CH1 CH2

The underscore symbol “_” will be on the row of the selected channel Values “15” and “25” (e.g.) are the set threshold points.

3. Select the wanted channel by pressing F1 (CH1) and F2 (CH2) buttons. The “_”

symbol will be on the row of the selected channel. 4. Modify the threshold value by pressing arrows “↓” and “↑”. 5. Press Enter to return to the previous menu.

Note: If the Alarm threshold is lower than the Warning threshold the display will show

this message:

-------------------- INPUT VALUE ERROR : DATA NOT CHANGED --------------------

The card will ignore the new value and will maintain the old one. This message will last for 3”, then the display will automatically return to the main

menu.



4.4.5. Analogue Inputs Test This function simulates an input signal variation in order to verify the system operation, without interacting with the field sensor. Attention: During this test, the field signal will not be read, because the input circuit is

under the H.H.M. influence. 1. From the main menu press function key F4. The display will show this message: SES-ASA 2402 TEST INPUT 1_04mA TEST INPUT 2 10mA CH1 CH2

The underscore symbol “_” will be on the row of the selected channel. Values “04mA” and “10mA” (e.g.) are the analogue value. 2. Select the wanted channel by pressing F1 (CH1) and F2 (CH2) buttons. The “_”

symbol will be on the row of the selected channel. 3. Modify the analogue input current by pressing arrows “↓” and “↑”. The display will

show the changes 4. Press Enter to return to the previous menu. Card 2402 or 2404 or 2407 will return to

the operative condition, ignoring any previous simulated input.



4.5. Board Configuration 4.5.1. Switch Setting Table

SW1 Board address setting (0-254) DP1 Address with weight 1 DP2 Address with weight 2 DP3 Address with weight 4 DP4 Address with weight 8 DP5 Address with weight 16 DP6 Address with weight 32 DP7 Address with weight 64 DP8 Address with weight 128

Note: it is not possible to configure more than one board with the same address

SW2 DP1 See Point 4.5.3 DP2 See Point 4.5.3 DP3 ON: Insert decimal point to display OFF: Disable decimal point to display DP4 ON: channel 2 disabled OFF: channel 2 enabled DP5 See Point 4.5.3 DP6 ON: Open Collector outputs for Warning and

Alarm in FLASHING mode OFF: Open Collector outputs for Warning and Alarm in STEADY mode

DP7 See Point 4.5.4 DP8 ON: (O.C.4-CH1) (O.C.8-CH2) = FAIL TO SAFE OFF: (O.C.4-CH1) (O.C.8-CH2) = CALIBRATION

4.5.2. Jumper Setting Table The card 2402 or 2404 or 2407 has the following jumpers:

- JP1: ....................................................used to activate RESET signal - JP2: ....................................................used to power the serial bus 2480 -

JP1 Close: forced RESET - Open: non forced RESET JP2 Close: the board feeds the amplification circuit of the serial bus 2480

Open: the board does not feed the amplification circuit of the serial bus 2480 Factory setting must not be altered 4.5.3. Selection Card Type 2402 or 2404 or 2407

SW2 DP1 DP2 DP5

ALL OFF 2402 Measure Full Scale 100 % L.E.L DP1 ON 2404 Measure Full Scale 100 ppm DP2 ON 2404 Measure Full Scale 50 ppm DP1 & DP2 ON 2404 Measure Full Scale 20 ppm DP5 ON 2407 Measure Full Scale 25 % Volume

4.5.4. Selection input Type

SW2 DP7 ON (STAR-UP 140” WAIT TIME) SW2 DP7 OFF (STAR-UP 70” WAIT TIME)

INPUT CURRENT mA

STATUS CARD MESSAGE ON DISPLAY

INPUT CURRENT mA

STATUS CARD MESSAGE ON DISPLAY

> 20,1 Over Range or > 20,1 Over Range or 3,0 ÷ 20 Measure Range -5 ÷ 99 3,4 ÷ 20 Measure Range -3 ÷ 99 1,7 ÷ 2,9 Dirty Optical d.o. 3,1 ÷ 3,3 Error S-600 E5 1,4 ÷ 1,6 Calibration CA 2,1 ÷ 3,0 Fault -5 → E5 < 1,4 Fault E5 1,4 ÷ 2,0 Calibration CA < 1,4 Fault E5

Is under working a version with dirty optical and calibration values, configurable by software P.S.2400, not available with this firmware version.



4.6. Typical Connections (3-wires sensor)



4.7. Typical Connections (4-wires sensor)



5. MAINTENANCE

5.1. General Module 2402 or 2404 or 2407, part of system F&G/ESD 2000 system should be installed following the specifications supplied, to ensure correct operation. The entire system (sensors and electronics) should be tested at least once a year. Checking of module 2402 or 2404 or 2407 will include these steps:

a) Check that cables and connections are integral and in good condition. b) Check that the system response is fully in accordance with the cause-effect table.

5.2. Storage

a) The electronic modules should be stored in a dry room and at temperatures within the values indicated in section 2.

b) If the modules are to be transported or stored for a long time, they should be

contained in antistatic envelopes and packed with protective material. 5.3. Self-Calibration This function is available only if the transmitter has this feature. Set Dip 7 of SW 2 ON and set Dip 8 of SW2 OFF, accordingly with the calibration output current coming from the transmitter during auto calibration routine. When auto calibration is activated, the transmitter will send to the card a typical current. This signal will start the calibration on the card. On the display (relative to the calibrated channel) will appear the “CA” message. Follow the calibration instruction described on the manual of the transmitter.



6. DIAGNOSTICS

Board 2402 or 2404 or 2407, designed for management of 2 analogue input channels, gives indication of each channel status through the corresponding LED’s placed on the front panel. If Fault LED’s do not activate, it is necessary to accurately investigate the board circuitry to detect the exact nature of this Fault. 6.1. Board Diagnostics Board 2402 or 2404 or 2407 has two logically separated circuits: one is aimed to operating design function, the other verifies the circuitry so that it is always possible to detect and recognise any Fault. The diagnostics is carried out on two levels: - power supply and operation of the microprocessor - test of input circuit section. 6.1.1. Diagnostics of Power Supplies and Microprocessor Board 2402 or 2404 or 2407, powered by two 24Vdc sources named ISO and I/O, is provided with three DC/DC converters dedicated to power supply of all of its sections: - logical section (ISO) - I/O section (I/O) The following diagram shows the circuit used to diagnose the power supply and microprocessor functions together with the Watchdog circuit.



6.1.2. Diagnostics of I/O Section The I/O section of board 2402 or 2404 or 2407 is continuously tested from the input terminal down to the microprocessor. The test circuit is shown below: 6.2. Interpretation Codes According to the function executed by the card, the display will show these related codes: CA Channel calibration Su The card is waiting for the analogue input signal stabilisation 99 Flashing. Analogue input signal between 20 and 22mA Or Over range. Analogue input signal more than 22mA d.o. Dirty Optical. Visible when DP7 of SW2 is ON, if used Infrared Gas detectors. 6.2.1. Error Codes When the card detects the presence of any error the channel display will show the following messages: E1 ISO power supply failure E2 24Vdc I/O power supply failure E3 Logical section failure E5 Analogue input signal less than 1mA



6.3. Troubleshooting This information is given as a guide to detect some of the most common operating problems. In case of failure, personnel authorised by SES ASA ENGINEERING S.R.L must carry out any repair. Any repair or tampering made by unauthorized personnel will invalidate the warranty.

FAULT: Low feed voltage in I/O section.

Possible Cause:

Unsuitable, undersized or defective power supply. Too high resistance of supply line.

Remedy: Give a power supply suitable to the system power requirements. Use power cables with suitable cross sectional area.

FAULT:

Low analogue input signal (from transmitter). Possible Cause:

Connection cable interrupted or high wire resistance. Remedy:

Replace the cable. Verify transmitter wiring with instructions listed at ch. 4.

Possible Cause: Calibration not correct.

Remedy: Calibrate again the sensor/transmitter.

Possible Cause:

Dip-Switches for gas or sensor selection not selected correctly. Remedy:

Re-configure Dip-Switches. Verify Switch setting with instruction described at chapter 4.

FAULT: High analogue input signal (from transmitter).

Possible Cause:

Dip-Switches for gas or sensor selection not selected correctly. Remedy:

Re-configure Dip-Switches. Verify Switches setting with instruction described at chapter 4.



FAULT:

Pushbuttons on front panel not operating. Possible Cause:

The front panel buttons can be used only if previously enabled by the CPU Facility through relative command.

Remedy: Enable the buttons through the Facility 2401 front panel buttons

FAULT:

Unable to calibrate correctly the sensor.

Possible Cause: Sensor or transmitter not corresponding to the appropriate characteristics. Not correct Calibration gas.

Remedy: Replace the sensor or/and the transmitter. Use the appropriate calibration gas kit.

FAULT:

Board not operating (Watchdog LED on front panel off). Possible Cause:

Fault in electronics (microprocessor, internal power supply, etc.). Remedy:

Check the protection fuses and/or replace the board.

The indications and explanations above should be considered as a suggestion in case of failure or malfunction. Whenever the problem cannot be solved even after following the above instructions, or it is not listed, please contact SES ASA ENGINEERING S.R.L or their representative.



6.4. Spare Parts

COMPONENT serial code - Complete card 2402-034561 - Complete card 2404-034562 - Complete card 2407-034563 - Front panel 2402-034031 - Front panel 2407-034032 - Front panel 2402-034033 - Programmed M38002 microprocessor 2402/2404/2407-015093 - A/D converter 574 contact SES-ASA - L602 integrated circuit contact SES-ASA - DS2Y relay 016041 - HARTING connector mod. 906326931 026027 - JP 122 isolated amplifier (Burr Brown) Contact SES-ASA - TLP 521/2 opto-isolator 012601



7. CARD LAYOUT

SES ASA ENGINEERING S.R.L Via Carolina Romani 8/10 20091 BRESSO (MI) ITALY

Declare Under Proper Responsibility That

PRODUCT : 2400 SERIES MODEL : 2402 Combustible Gas Card 2404 Toxic Gas Card 2407 Oxygen Gas Card

Is In Accordance With Following Directives:

EMC 89/336CEE e 92/31/CEE

EN 55011 – CEI110-6 – EN 50082-2 EN 61000-2 – EN 61000-4 IEC 1000-2 – IEC 1000-4

IEC801-2 e IEC 801-4

In Legal Representation of Manufacturer

SES ASA ENGINEERING S.R.L

ses-enser - 2402 combustible g c 2 c toxic gas...

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