Page 12
Signal Processor
User Guide
LMG GS
2.2.1 Alarm output connection schedule
The alarm output connection schedule is given in Fig. 5. The alarm relay
contact rating is 50V a.c. or d.c. at 0.5A.
2.2.2 CMD (Command) input connection schedule
The CMD (Command) input connection schedule is given in Fig. 6.
The command signal is inactive when the voltage is >3.0V or open circuit
(i.e. track). The command signal is active when the voltage is <1.5V or short
circuit (i.e. hold).
The command input can be controlled via a remote switch, as shown in Fig.7,
or via potential-free contacts, as shown in Fig. 8.
NOTE
Each alarm is designed to be ‘fail-safe’. i.e. if there is a loss of power to
the processor, the alarms will remain in an activated state until the power
supply is restored.
Fig. 5 - ‘Alarm’ cable connection schedule
238005
Fig. 6 - ‘CMD’ (command) cable connection schedule
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Pin Nº
Alarm Output
CMD (Command) input
C
NO
NC
C
NO
NC
1
2
3
4
5
6
Common
Normally Open
Normally Closed
Common
Normally Open
Normally Closed
Al
ar
m
s
Function
Description
Alarm 1
Alarm 2
Pin Nº
Function
Description
CMD+
1
Command input drive
Command input
return
CMD-
2
CMD
Fig. 8 - ‘CMD’ (command) input control via potential-free contacts
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