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18

Setting Alarm as Latching or Non-Latching

The alarms can be set as latching or Non-Latching by setting the Dip-
Switch located on upper left corner of the control module.  See figure 6.
The dip-switch is labeled as 

Relays

 with arrow indicating the switch

selection for latching or non-latching.  Position 1 of the Dip-switch is for
Low alarm , position 2 is for High alarm and position 3 for High-High
alarm.  Position 4 is not used for standard application and is reserved for
custom application or future use.
To set the alarm as latching move the dip-switch up or move the dip
switch down for non-latching alarms.
The dip-switch positions in the diagram below shows Low and High
alarm configured as non-latching and High-High alarm set as latching

Setting alarm contacts as Normally Open or Normally Closed

To set the alarm contacts as normally open or normally 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.

RELAYS

LATCHING

NON−LATHING

1 2 3 4

NO  NC

NO  NC

Jump Pin 2 and 3 for
Normally closed contacts

Jump Pin 1 and 2 for
Normally Open contacts

Содержание PT900-8FG

Страница 1: ...MODEL PT900 8FG 8 CHANNEL GAS MONITOR CONTROLLER Operator s Manual Revision 2 0 March 2001 Pem Tech Inc Houston Texas U S A ...

Страница 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...

Страница 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...

Страница 4: ...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 Latching or Non Lat...

Страница 5: ...10 Deep WEIGHT 38 Lbs OPERATING 40 F to 170 F TEMPERATURE POWER INPUT 117 220 VAC or 24 28 VDC HUMIDITY 0 to 95 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 ...

Страница 6: ...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 supplied to remote sensor transmi...

Страница 7: ...or 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 programmed via pushbutton switch provided on t...

Страница 8: ...S PEM TECH 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 PT950 B Control Module ...

Страница 9: ... 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 8 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 enclosure 4 MOUNTING HOLES DIA 0 35 FIBERGLASS ENCLOSURE 16 WIDE...

Страница 10: ...8VDC FROM ON BOARD AC DC POWER SUPPLY SENSOR SUPPLY SENSOR GND E SENSOR SIGNAL IN B2003230 1 0 1 OF 1 USER TERMINAT ION MODEL PT900 8FG 8 EACH PT950B CONTROL MODULES IN FIBERGLAS S ENCLOSUR E 1 0 POWER ON OFF CH1 E CH2 E CH3 E CH4 E CH5 E CH6 E CH7 E CH8 AUX RELAY POWER POS NEG RS485 8 REMOTE SENSOR CONNECTION MOUNTED BEHIND FRONT PANEL 3 CONDUCTOR CABLE 10AMP AUX RELAY BD DATE 03 20 03 optional 4...

Страница 11: ...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 devices to the...

Страница 12: ...MMON GND E mA OUTPUT E SENSOR 4 20mA LOW HI HI HI ALARM 3 DEVICE DEVICE ALARM 2 ALARM 1 DEVICE COM OUT COM OUT COM OUT V SUPPLY RETURN ANALOG OUTPUT PT900 8 TERMINATION BOARD 4 20mA TERMINATION BOARD FOR REMOTE SENSOR TRANSMITTER NOTE COMPLETE TERMINATION BOARD IS NOT SHOWN CONNECTIONS FOR ALL CONTROL MODULES ARE SIMILAR ...

Страница 13: ...T COM OUT LOW HIGH HI HI SENSOR 4 20 COM OUT OUT COM OUT COM OUT OUT OUT COM COM COM LOW HIGH HI HI OUT COM JMP 1 JMP 2 JMP 7 NOTE INSTALL JUMPERS JMP 1 THRU JMP 7 TO TIE ALARM CONTACTS OF EACH CONTROL MODULE TO AUXILIARY RELAY BOARD CONNECT ALARM TERMINALS OF CH8 TO AUXILIARY RELAY BOARD AS SHOWN GND V COM OUT COM OUT AUX RELAY COIL PWR AUX RELAY BOARD SENSOR 4 20 SENSOR 4 20 ...

Страница 14: ...or and verify following conditions 1 All the installed control modules will display their corresponding channel number on the display channel 1 thru 8 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 ...

Страница 15: ...fy 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 Non Latching Normally Open Alarm Reset Once the gas concentration has dropped below the alarm level the relay will deactivate itself How...

Страница 16: ...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 ...

Страница 17: ...cale of the sensor For example for H2S or LEL the alarm level can be set between 0 and 99 If the desired alarm level is below current settings press and hold the switch The displayed alarm level will start over from 0 after 99 4 Release the switch when alarm level set 5 About five 5 seconds after the switch has been released the Low alarm LED will be turned off Low alarm level is set Now High alar...

Страница 18: ... as latching move the dip switch up or move the dip switch down for non latching alarms The dip switch positions in the diagram below shows Low and High alarm configured as non latching and High High alarm set as latching Setting alarm contacts as Normally Open or Normally Closed To set the alarm contacts as normally open or normally closed set the jumpers for each relay located right above the re...

Страница 19: ...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 PT950 B Control Module ...

Страница 20: ...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 ...

Страница 21: ...7 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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