Teledyne Meridian User Manual page 91

Alarm Connection Example – Terminal/Relay/MODBUS PCB
Connections – Terminal/Relay/MODBUS PCB
Figure 4-19: Relay/Alarm Connection Example – Terminal/Relay/MODBUS PCB
Figure 4-20: Relays/Remote Alarm Reset Connections – Terminal/Relay/MODBUS PCB
CAUTION: Contacts are rated for resistive loads; alarm relays have dry contacts (form C) and
power must be supplied from an external source. Failure to do so could result in failure of alarm
relays.
6. If desired, connect a remote switch to TB3 on the terminal/relay/MODBUS RS-485 PCB. This feature allows
you to shut off and reset a sounding remote alarm (refer to
tions – Terminal/Relay/MODBUS PCB
WARNING: EXTERNAL WIRING TO TB3 MUST BE SHIELDED AND PROTECTED FROM
NOISE SPIKES TO PREVENT A FALSE ALARM RESET CONDITION. FAILURE TO DO SO COULD
RESULT IN INJURY OR DEATH IF A FALSE ALARM RESET CONDITION OCCURS.
7. Insert the lower PCB stack into the housing after wiring the terminal blocks.
8. Insert and tighten the four (4) standoffs.
9. Push the LCD PCB/CPU PCB set into the four (4) standoffs.
10. Install housing cover, tighten and secure the setscrew.
Information contained herein is classified as EAR99 under the U.S. Export Administration Regulations. Export, reexport or diversion contrary to U.S. law is
for details).
ALARM1
NC
C
NO
ALARM2
NC
C
NO
RS-485
RMT
A S B A
1
ACK
GND
TERM. NOT TERM.
ALARM3
NO
C
NC
FAULT
NO
C
NC
DUP
RS-485 RS-485
LP2
LP1 LP3
+ - + - B A S B
+ -
11
+V
GND
10-30VDC
for details).
USE AND DISCLOSURE OF DATA
prohibited.
and Figure 4-20: Relays/Remote Alarm Reset
Yellow Lamp
(+)
Power
(-)
Red Lamp
ALARM1
NC
C
NO
ALARM2
NC
Remote
C
NO
Alarm Reset
RMT
A
1
ACK
GND
TERM. NOT TERM.
Remote
Reset PB
Figure 4-20: Relays/Remote Alarm Reset Connec-
MERIDIAN
UNIVERSAL GAS DETECTOR
INSTALLATION
4-37