MDS 05-3438A01, Rev. F MDS 4790/9790 Series I/O Guide 25
Terminals 1 and 2 provide solid state relay contacts that
close when a minor alarm is detected. Terminals 3 and 4 provide relay
contacts that close when a major alarm is detected. You can redefine
these relay contacts using the radio’s software (switched from minor to
major alarm outputs, or vice versa). The ASENSE command is used to
change the relay contacts from normally open (
NO) to normally closed
(
NC). The contacts are rated for non-inductive loads up to a maximum
60 Volts (AC or DC) at 1 A.
Invisible place holder
Figure 23. Alarm Relay Connections
MAJOR ALARM
RELAY
(NORMALLY OPEN)
MINOR ALARM
RELAY
(NORMALLY OPEN)
4123 5 6
PINS 5 &6 RESERVED FOR
FUTURE USE—DO NOT CONNECT
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