PEMTECH PT900-12 Operator'S Manual Download Page 21

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PT900-12 Monitor/Controller
Rev 2.0

Parts List

Part Number

Description

C- 725

117/230VAC to 24 VDC power
supply for 12 Control modules and sensors

S-418

Auxiliary Relay Board assembly

C- 720

Blank Cover plates

C-587

Replacement card guide

C-127

Mini Sensor Fuse

PT950-B Series Control Modules

950-B-H2S

Model PT950-B Control Module for H2S sensor

950-B-LEL

Model PT950-B Control Module for LEL sensor

950-B-OXY

Model PT950-B Control Module for oxygen sensor

950-B-SO2

Model PT950-B Control Module for SO2 sensor

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

sensors

Summary of Contents for PT900-12

Page 1: ...Model PT900 12 Twelve 12 Channel Gas Monitor Controller Revision 2 0 March 2001 Operator s Manual Pem Tech Inc Houston Texas U S A www pem tech com Gas DetectionTechnology ...

Page 2: ...ts beyond the control 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 par...

Page 3: ...re of the problem 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 und...

Page 4: ... control modules in Rack assembly AC or DC power Input 11 Connecting sensors to monitor 11 Alarm wiring 11 Figure 4 Sensor and alarm wiring diagram 12 Figure 5 Wiring auxiliary relay board for common 13 Alarm contacts Startup 14 Apply Power 14 Normal Operation and alarms Normal Operation 15 Alarms 15 Alarm Reset 15 Alarm Bypass 15 Programming Alarms 16 Programming Alarm Levels 17 Setting alarms as...

Page 5: ...NS 27 H x 24 5 W x 10 D WEIGHT 48 Lbs OPERATING 40 F to 149 F TEMPERATURE POWER INPUT 117 VAC or 24 28 VDC HUMIDITY 0 to 100 non condensing AUXILIARY ALARM 4 Common alarm relays RELAYS Form C type rated 10Amps TERMINATIONS Terminal blocks for sensor and alarm connections for wire size 16 22 AWG ALARM RESET Master alarm Reset switch to Reset or SWITCH Acknowledge alarms on all control modules ...

Page 6: ...Relay Ratings 4 each Form C type relay contacts Rated 5 Amps each Low High High High and Malfunction Field programmable alarm levels Latching or non latching Normally open or Normally Closed contact 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 power input Power is supplie...

Page 7: ... 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 on the main rack assembly to Reset Alarms Programmable Relays Each control module has three 3 programmable relays for Low High and High High alarms The alarm relay set points can be programme...

Page 8: ...PT900 12 Monitor Controller Rev 2 0 8 Digital Display Visual Alarm LED indicators Alarm Bypass Switch Pushbutton switch Alarm Reset Adjust Captive Screw Handle Figure 1 PT950 BControlModule ...

Page 9: ...ront panel a captive screw is provided 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 insertion and removal of the module from the rack assembly PT900 12 FG enclosure must be installed in a safe area Figure 2 shows the mounting holes for the fiberglass enclosure Figure 2 Dimensions for PT900 Series Fiberglass enc...

Page 10: ...PT900 12 Monitor Controller Rev 2 0 10 Figure 3 User termination PT900 12FG 12 Each PT950 series control modules in Fiberglass enclosure ...

Page 11: ...le Each remote sensor should be connected 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...

Page 12: ...PT900 12 Monitor Controller Rev 2 0 12 Figure 4 Remote Sensor connection Alarm wiring to control modules ...

Page 13: ...PT900 12 Monitor Controller Rev 2 0 13 Figure 5 Wiring Auxiliary relay board for common alarm contacts Dry Contacts for Alarm devices ...

Page 14: ...power to the monitor and verify following conditions 1 All the installed control modules 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...

Page 15: ...t The user must verify the alarm set points and make changes if desired Refer to section on Programming Alarm Set points Factory Alarm Settings are Alarm Alarm Level Alarm Type Contact Type Low Alarm 10 Non Latching Normally Open High Alarm 15 Non Latching Normally Open High High 20 Latching Normally Open Alarm Reset Once the gas concentration has dropped below the alarm level the relay will deact...

Page 16: ...on ProgrammingAlarms 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 l...

Page 17: ... turned off Low alarm 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 orNon Latching The alarms can be set as latching or Non Latching by setti...

Page 18: ...ormally closed set the jumpers for each relay 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 Jump Pin 2 and 3 for Normally closed contacts Jump Pin 1 and 2 for Normally Open contacts ...

Page 19: ...PT900 12 Monitor Controller Rev 2 0 19 Figure 6 PT950 B Control Module ...

Page 20: ... however can be programmed 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 sens...

Page 21: ...k Cover plates C 587 Replacement card guide C 127 Mini Sensor Fuse PT950 B Series Control Modules 950 B H2S Model PT950 B Control Module for H2S sensor 950 B LEL Model PT950 B Control Module for LEL sensor 950 B OXY Model PT950 B Control Module for oxygen sensor 950 B SO2 Model PT950 B Control Module for SO2 sensor Call factory for detail list of control modules available for various gas sensors ...

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