INSTRUCTION MANUAL. Software Revision Card 3.2 DOCUMENT SES-KS E REV. 3

Transcription

1 2402 COMBUSTIBLE GAS CARD 2 CHANNELS 2404 TOXIC GAS CARD 2 CHANNELS 2407 OXYGEN GAS CARD 2 CHANNELS INSTRUCTION MANUAL Software Revision Card 3.2 DOCUMENT SES-KS E REV. 3

2 CHANNELS CARDS SES-ASA ENGINEERING Page 2 of INSTRUCTION MANUAL - SES-KS E Rev.3

3 SES-ASA ENGINEERING CHANNELS CARDS 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 3 of 32

4 CHANNELS CARDS SES-ASA ENGINEERING TABLE OF CONTENTS 1. INTRODUCTION General Block Diagram SPECIFICATIONS Specifications of Board 2402 or 2404 or Mechanical Specifications Board Rack Electrical Specifications Board Power Requirements Input Signals Auxiliary OC Output Signals ( 30Vdc@0,1A max.) per each Channel: Relay Output Signals Analog Input Accuracy: Operating Conditions INSTALLATION Handling and Shipping Installation Installation of Sensors with Field Transmitter OPERATIVE INSTRUCTIONS Operation Connector Connections to the Field Connection to a Sensor with 4-20 ma Transmitter or Smart Sensor Setting and Operation of Auxiliary Outputs Fail to Safe Operation of Alarm/Warning Auxiliary Outputs, in Flashing or Continuous mode Front Keyboard Procedures Executable from the Front Panel Flow Diagram of Front Keyboard Operating Modes Use of Hand-Held Monitor Test Unit Channel status check Modification of Warning threshold Modification of Alarm threshold Analogue Inputs Test Board Configuration Switch Setting Table Jumper Setting Table Selection Card Type 2402 or 2404 or Selection input Type Typical Connections (3-wires sensor) Typical Connections (4-wires sensor) MAINTENANCE General Storage Self-Calibration DIAGNOSTICS Board Diagnostics Diagnostics of Power Supplies and Microprocessor Diagnostics of I/O Section Interpretation Codes Error Codes Troubleshooting Spare Parts CARD LAYOUT Page 4 of INSTRUCTION MANUAL - SES-KS E Rev.3

5 SES-ASA ENGINEERING CHANNELS CARDS 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 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 I/O connector INSTRUCTION MANUAL - SES-KS E Rev.3 Page 5 of 32

6 CHANNELS CARDS SES-ASA ENGINEERING 1.2. Block Diagram Page 6 of INSTRUCTION MANUAL - SES-KS E Rev.3

7 SES-ASA ENGINEERING CHANNELS CARDS 2. SPECIFICATIONS 2.1. Specifications of Board 2402 or 2404 or 2407 Application: Measure Span 2402: Measure Span 2404: Measure Span 2407: N. of Channels: Operating Environment: Warranty: Detection of Combustible, Toxic or Oxygen gases (together with a sensor with 4-20 ma transmitter or Smart Sensor) 0-100% LEL (lower explosive limit) 0-20, 0-50 or ppm (part per million) 0-25% Volume (depletion of Oxygen in air) 2 analogue inputs 0 22mA Safe area 2 years of uninterrupted operation Mechanical Specifications Board Size: Double euro elongated 6U 19 Weight: Height: Length: Front Width: 440 g 233 mm 220 mm 5TE Rack Size: Weight: Standard 19 6U 2600 g Width: 19 Height: Depth: 266 mm 283 mm INSTRUCTION MANUAL - SES-KS E Rev.3 Page 7 of 32

8 CHANNELS CARDS SES-ASA ENGINEERING 2.3. Electrical Specifications Power Supply: 24Vdc (nominal), 20 to 30Vdc Fuse: 24Vdc ISO line: 500mA, Retard 24Vdc I/O line: 500mA, Retard Board Power Requirements Internal consumption: 24Vdc ISO line: Quiescent : 130mA Alarm : 140mA Input Signals Dual channel analogue signal 0 22 ma (single point) 24Vdc I/O line: Quiescent/Alarm: 50mA (this value does not include consumption of the sensor with transmitter connected to the board.) 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) Relay Output Signals Common and N.O. contact for Watchdog signal with capacity for resistive loads: - 250Vac - 125Vdc - 30Vdc Note: the relay is normally energised Analog Input Accuracy: 2% FDS on input 0 to 22mA Page 8 of INSTRUCTION MANUAL - SES-KS E Rev.3

9 SES-ASA ENGINEERING CHANNELS CARDS 2.4. Operating Conditions Operating Temperature: Storage Temperature: Environment Humidity: 0 C to + 70 C (32 to +158 F) -40 to + 85 C (-40 to +185 F) 0% to 95% not condensing. 2.5 Front Panel Indications For each channel: Common: 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 Redundant LED (red) for serial line transmission (TX) Redundant LED (red) for serial line reception (RX) Redundant LED (yellow) for Watchdog (WD) active INSTRUCTION MANUAL - SES-KS E Rev.3 Page 9 of 32

10 CHANNELS CARDS SES-ASA ENGINEERING 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 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 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. Page 10 of INSTRUCTION MANUAL - SES-KS E Rev.3

11 SES-ASA ENGINEERING CHANNELS CARDS 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 11 of 32

12 CHANNELS CARDS SES-ASA ENGINEERING 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) 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 Typical Connections. Page 12 of INSTRUCTION MANUAL - SES-KS E Rev.3

13 SES-ASA ENGINEERING CHANNELS CARDS 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 OC1 = Alarm OC2 = Warning OC3 = Fault OC4 = Calibration/Fail to Safe CH2 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 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 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) INSTRUCTION MANUAL - SES-KS E Rev.3 Page 13 of 32

14 CHANNELS CARDS SES-ASA ENGINEERING 4.3. Front Keyboard 2402 %L.E.L p p m 2407 % O 2 7 Segment Each Display for Value Reading on CH1 ALARM ALARM ALARM ALARM Indication (double red LED) - CH1 Alarm WARN WARN WARN WARNING Indication (double red LED) - CH1 Warning READY FAULT %L.E.L. READY FAULT p p m READY FAULT % O 2 READY Indication (double green LED) - CH1 Ready FAULT Indication (double yellow LED) - CH1 Fault 7 Segment Each Display for Value Reading on CH2 ALARM ALARM ALARM ALARM Indication (double red LED) - CH2 Alarm WARN WARN WARN WARNING Indication (double red LED) - CH2 Warning READY FAULT READY FAULT READY FAULT READY Indication (double green LED) - CH2 Ready FAULT Indication (double yellow LED) - CH2 Fault TX TX TX TX Indication (double red LED) of Serial Line Transmission RX WD RX WD RX WD RX Indication (double red LED) of Serial Line Receive WD Indication (double yellow LED) of WatchDog Control (Instrument Ready) SEL INH SEL INH SEL INH FRONT BUTTONS SET TEST SET TEST SET TEST See paragraf Procedures executable from the front panel H H H H H H 25 Pins, DB Connector, for Hand Held Monitor M M M Page 14 of INSTRUCTION MANUAL - SES-KS E Rev.3

15 SES-ASA ENGINEERING CHANNELS CARDS 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 15 of 32

16 CHANNELS CARDS SES-ASA ENGINEERING Restoring of Inhibited Channel Test 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. 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. Page 16 of INSTRUCTION MANUAL - SES-KS E Rev.3

17 SES-ASA ENGINEERING CHANNELS CARDS Flow Diagram of Front Keyboard Operating Modes Cycle for Display of Warning and Alarm Thresholds INSTRUCTION MANUAL - SES-KS E Rev.3 Page 17 of 32

18 CHANNELS CARDS SES-ASA ENGINEERING Cycle for Channel Inhibition Page 18 of INSTRUCTION MANUAL - SES-KS E Rev.3

19 SES-ASA ENGINEERING CHANNELS CARDS 4.4. Use of Hand-Held Monitor Test Unit 2490 The H.H.M 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 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 19 of 32

20 CHANNELS CARDS SES-ASA ENGINEERING 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. Page 20 of INSTRUCTION MANUAL - SES-KS E Rev.3

21 SES-ASA ENGINEERING CHANNELS CARDS 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 21 of 32

22 CHANNELS CARDS SES-ASA ENGINEERING 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. Page 22 of INSTRUCTION MANUAL - SES-KS E Rev.3

23 SES-ASA ENGINEERING CHANNELS CARDS 4.5. Board Configuration 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 DP2 See Point 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 DP6 ON: Open Collector outputs for Warning and OFF: Open Collector outputs for Warning and Alarm Alarm in FLASHING mode in STEADY mode DP7 See Point DP8 ON: (O.C.4-CH1) (O.C.8-CH2) = FAIL TO SAFE OFF: (O.C.4-CH1) (O.C.8-CH2) = CALIBRATION 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 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 Selection Card Type 2402 or 2404 or 2407 SW2 DP1 DP2 DP5 ALL OFF DP1 ON DP2 ON DP1 & DP2 ON DP5 ON 2402 Measure Full Scale 100 % L.E.L 2404 Measure Full Scale 100 ppm 2404 Measure Full Scale 50 ppm 2404 Measure Full Scale 20 ppm 2407 Measure Full Scale 25 % Volume 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 ,4 20 Measure Range ,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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 23 of 32

24 CHANNELS CARDS SES-ASA ENGINEERING 4.6. Typical Connections (3-wires sensor) Page 24 of INSTRUCTION MANUAL - SES-KS E Rev.3

25 SES-ASA ENGINEERING CHANNELS CARDS 4.7. Typical Connections (4-wires sensor) INSTRUCTION MANUAL - SES-KS E Rev.3 Page 25 of 32

26 CHANNELS CARDS SES-ASA ENGINEERING 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 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 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. Page 26 of INSTRUCTION MANUAL - SES-KS E Rev.3

27 SES-ASA ENGINEERING CHANNELS CARDS 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 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 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 27 of 32

28 CHANNELS CARDS SES-ASA ENGINEERING 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 Error Codes When the card detects the presence of any error the channel display will show the following messages: E1 E2 E3 E5 ISO power supply failure 24Vdc I/O power supply failure Logical section failure Analogue input signal less than 1mA Page 28 of INSTRUCTION MANUAL - SES-KS E Rev.3

29 SES-ASA ENGINEERING CHANNELS CARDS 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 INSTRUCTION MANUAL - SES-KS E Rev.3 Page 29 of 32

30 CHANNELS CARDS SES-ASA ENGINEERING 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. Page 30 of INSTRUCTION MANUAL - SES-KS E Rev.3

31 SES-ASA ENGINEERING CHANNELS CARDS 6.4. Spare Parts COMPONENT serial code - Complete card Complete card Complete card Front panel Front panel Front panel Programmed M38002 microprocessor 2402/2404/ A/D converter 574 contact SES-ASA - L602 integrated circuit contact SES-ASA - DS2Y relay HARTING connector mod JP 122 isolated amplifier (Burr Brown) Contact SES-ASA - TLP 521/2 opto-isolator INSTRUCTION MANUAL - SES-KS E Rev.3 Page 31 of 32

32 CHANNELS CARDS SES-ASA ENGINEERING 7. CARD LAYOUT Page 32 of INSTRUCTION MANUAL - SES-KS E Rev.3

33 SES ASA ENGINEERING S.R.L Via Carolina Romani 8/ 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 CEI110-6 EN EN EN IEC IEC IEC801-2 e IEC In Legal Representation of Manufacturer SES ASA ENGINEERING S.R.L