PEMTECH PT900-12R Operator'S Manual Download Page 23

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Parts List

Part

Number

Description

S-760

Auxiliary Relay Board assembly

C-720

Blank Cover plates

C-587

Replacement card guide

C-531

Mini Blue jumper Links

C-127

Mini Sensor Fuse

PT902M Series Control Modules

902M-H

Model PT902M Control Module for H2S sensor

(Hydrogen Sulfide)

902M-L

Model PT902M Control Module for LEL sensor
(Combustible Hydrocarbon)

902M-SO2

Model PT902M Control Module for SO2 sensor
(Sulfur Dioxide)

902M-NO2

Model PT902M Control Module for NO2 sensor
(Nitrogen Dioxide)

902M-CO

Model PT902M Control Module for CO sensor
(Carbon Monoxide)

902M-CL

Model PT902M Control Module for CL2 sensor
(Chlorine)

902M-O2

Model PT902M Control Module for oxygen sensor

Call factory for detail list of control modules available for various gas

sensors

Summary of Contents for PT900-12R

Page 1: ...MODEL PT900 12R 12 Channel Gas Monitor Controller 19 Rack mount Operator s Manual Revision 3 1 November 2003 Pem Tech Inc Houston Texas U S A ...

Page 2: ...rol of PEM TECH including but not limited to damage by accident negligence tampering or failure to operate in accordance with the procedures outlined in the Operations Manual PEM TECH s liability under no circumstances will exceed replacement of the unit claimed to be defective Tampering with the equipment and altering it for uses other than the intended use or replacement of parts not supplied by...

Page 3: ...and obtain shipping address Properly pack the equipment before shipping Also include your complete shipping address and contact name and phone number For non warranty repairs you must provide the limit to repair costs State if a quote for repair cost is required before you can authorize the repair cost For this an additional charge may be applicable NOTE 1 For all the repairs under warranty serial...

Page 4: ...to monitor 11 Alarm wiring 11 Figure 3 System Overview drawing 12 User termination control modules in Rack assembly Figure 4 Sensor and alarm wiring diagram 13 Figure 5 Wiring auxiliary relay board for common 14 Alarm contacts Startup 15 Apply Power 15 Normal Operation and alarms Normal Operation 16 Alarms 16 Alarm Reset 16 Alarm Bypass 16 Programming Alarms 17 Programming Alarm Levels 18 Setting ...

Page 5: ...9 Rack mount OPERATING 40 F to 170 F TEMPERATURE POWER INPUT 24 VDC HUMIDITY 0 to 100 non condensing AUXILIARY ALARM 4 Common alarm relays RELAYS Optional Form C type rated 10Amps TERMINATIONS Terminal blocks for sensor and alarm connections for wire size 16 22 AWG ...

Page 6: ...tching Normally open or Normally Closed contacts Fault Relay Malfunction relay activated when remote sensor in fail Programmable as Normally open or normally closed contacts Visual Indicators 4 Bright LEDs on the front panel to indicate alarm status Amber LED for Low Alarm Red LEDs for High and High High and Malfunction Alarm Power Input 24 VDC Nominal 18 28 VDC Power is supplied to remote sensor ...

Page 7: ...arm relay contacts Alarms programmable via switches on the front panel Sensor Malfunction relay contact Visual alarm indicators on the front panel Alarm RESET and BYPASS switch RS485 Serial Communication for Remote data display Master Alarm Reset connection for Remote alarm Reset Switch Programmable Relays Each control module has three 3 programmable relays for Low High and High High alarms The al...

Page 8: ... INC LOW HIGH HI HI MALF MODEL PT 950 MONITOR HOUSTON TEXAS Digital Display Visual Alarm LED indicators Alarm Bypass Switch Pushbutton switch Alarm Reset Adjust Captive Screw Handle Figure 1 PT902M Control Module Model PT902M Monitor ...

Page 9: ...ded to secure the control module to the rack Do not use excessive force to tighten the screw Also a handle is provided to facilitate for easy insertion and removal of the module from the rack assembly PT902M Control module can be connected to any PT205 and PT295 Series sensor transmitter Refer to figure 4 for sensor wiring connections Figure 2 PT902M Series Control Modules in a standard 19 Rack as...

Page 10: ... OFF 2 CH13 CH24 OFF ON 3 CH25 CH36 ON ON 4 CH37 CH48 Modifying Control Module Address The control module address can be changed from its default address Remember that all control modules in the control panel must have sequential and distinct addresses to communicate properly with the remote annunciator To change the module address follow the steps below 1 Position the toggle switch on the front p...

Page 11: ...nected by a 3 conductor shielded cable See figure 4 for remote sensor connection Alarm Wiring Figure 4 shows a typical wiring diagram for connecting alarm devices to relay contacts on the control module Note that contacts are dry or potential free contacts Refer to the wiring details provided by the manufacturer of alarm devices Figure 4 shows the wiring of alarm devices to the relay contacts of a...

Page 12: ... FOR DRY CONTACT SWITCH SINGLE PAIR TWISTED SHILEDED CABLE FOR DATA COMMUNICATION MAX LENGTH 4000 FEET DRY ALARM SENSOR MALFUNCTION RELAY CONTACTS DRY ALARM CONTACTS FOR INDIVIDUAL CONTROL MODULE CONNECTION JUMPER LINKS FROM 1 THRU 11 FOR COMMON ALARM CONTACTS REFER TO DRAWING B2000xxxx FOR EXTERNAL ALARM DEVICE WIRING HI HI HIGH LOW PT900 SERIES RACKMOUNT MONITOR TERMINATION BOARD ASSEMBLY AUX RE...

Page 13: ...13 Figure 4 Remote Sensor connection Alarm wiring to control modules ...

Page 14: ...RMINATION BOARD T O A U X R E LA Y S PT900 12R TERMINATION BOARD AUXILIARY RELAY BOARD ASSEMBLY PART NUMBER S 760 ALARM 1 DEVICE DEVICE ALARM 2 RETURN V DEVICE ALARM 3 V RETURN V RETURN POWER SOURCE FOR ALARM DEVICES AC OR DC V SUPPLY SUPPLY RETURN JUMP WIRE ALL COM TERMINALS TOGETHER CONNECT TO SUPPLY RETURN FOR ALARM DEVICES ALARM RELAYS CONTACTS RATED 10 AMPS EACH NOTE ALARM 1 ALARM 2 ALARM 3 C...

Page 15: ... will display their corresponding channel number on the display channel 1 thru 12 For example the control module in the slot 1 will display 01 module in slot 2 will display 02 and so on The channel number will rapidly flash for few seconds 2 Each control module will then display low high and High High alarm set points The visual alarm LED indicator will be lit while the unit displays the alarm set...

Page 16: ...t the factory before shipment The user must verify the alarm set points and make changes if desired Refer to section on Programming Alarm Set points See table 1 for range and default alarm levels for few of the PT902M Control monitor modules Alarm Reset Once the gas concentration has dropped below the alarm level the relay will deactivate itself However this is true only of the relay is configured...

Page 17: ...ms Alarm levels must be programmed in order to activate the dry relay contacts on the main control board Alarm levels can be set anywhere between 0 and the full scale of the sensor Alarm relays can also be selected as Latching or non latching type Also jumpers on the control module can be selected to program the relay contacts to be Normally Open or Normally Closed If any alarm level is set to 00 ...

Page 18: ...10 NL 20 NL 30 NL Oxygen O2 25 17 NL 23 NL 24 NL Sulfur Dioxide SO2 50 ppm 5 ppm NL 15 ppm NL 20 ppm NL Carbon Monoxide CO 100 ppm 10 ppm NL 20 ppm NL 50 ppm NL Nitrogen Dioxide NO2 20 ppm 5 ppm NL 15 ppm NL 20 ppm NL Note that for Oxygen Low Alarm is activated on the depleting oxygen level That is Low alarm relay is activated when the oxygen concentration falls below the programmed low alarm leve...

Page 19: ...arm level is set Now High alarm LED starts flashing and the display will show the High alarm level The monitor is ready for High alarm level Repeat steps 3 and 4 to set High and High High alarm levels 6 After setting High High alarm level the monitor will return to normal operation Setting Alarm as Latching or Non Latching The alarms can be set as latching or Non Latching by setting the Dip Switch...

Page 20: ...elay located right above the relay on the control module See figure 6 Each jumper is a 3 pin header with a mating connector to connect any two of the three pins To set the contact type set the jumpers as show below NO NC NO NC Jump Pin 2 and 3 for Normally closed contacts Jump Pin 1 and 2 for Normally Open contacts RELAYS LATCHING NON LATHING 1 2 3 4 ...

Page 21: ...Y OPEN RELAYS LATCHING NON LATHING ADJ 4 20 OFST SPAN SENSOR FUSE HI HI HIGH LOW MALF NO NC NO NC NO NC NO NC 4 AMP MINI SENSOR FUSE SET JUMPER NORMALLY CLOSED OR NORMALLY OPEN NO NC NO NC SWITCH POSITION UP FOR LATCHING DOWN FOR NON LATCHING POTENTIOMETERS TO FINE TUNE 4 20mA ANALOG OUTPUT PUSHBUTTON SWITCH ALARM RESET BYPASS TOGGLE SWITCH Figure 6 PT902M Control Module ...

Page 22: ...ogrammed as normally open or normally closed If a fault condition occurs 1 Make sure the wires on the sensor input terminal of the main connection board are secure and connected properly 2 Check if the sensor supply fuse located on the control module is OK The fuse can be checked by verifying the DC power on the sensor terminal using a digital voltmeter If the and pin on the sensor terminal reads ...

Page 23: ...ide 902M L Model PT902M Control Module for LEL sensor Combustible Hydrocarbon 902M SO2 Model PT902M Control Module for SO2 sensor Sulfur Dioxide 902M NO2 Model PT902M Control Module for NO2 sensor Nitrogen Dioxide 902M CO Model PT902M Control Module for CO sensor Carbon Monoxide 902M CL Model PT902M Control Module for CL2 sensor Chlorine 902M O2 Model PT902M Control Module for oxygen sensor Call f...

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