ST-72 User's Manual
Document: UM-1007
Revision Level A
62
The analog output board has a failure detection circuit. If the output board’s processor
fails, or if communication is lost with the CPU board, then the outputs of all channels go
to 0mA.
TB3 & TB4 24VDC
inputs are tied together
making daisy chaining
the options easier.
LEDs indicate board
configuration.
J3 & J4 are interchangeable
I2C connectors used to add
option PCB assemblies to
the ST-72
Figure 3-5
3.2.6
OPTIONAL PROGRAMMABLE RELAY BOARD # 10-0350
An optional
Programmable Relay Board
, shown in Figure 3-6, adds 16 programmable 5
amp (resistive) form C relays per 16 channel alarm board. Each relay may be configured
via the Alarm Outputs Menu in the ST-72 Main Menu for ALARM 1 VOTES, ALARM 2
VOTES, ALARM 3 VOTES, ACKNOWLEDGE, FAILSAFE, ZONES and OVERRIDES. Each relay
can be individually programmed for any channel or combination of channels using the
zone and override parameters. Many ST-72 applications need more than the five
Summary of Contents for ST-72
Page 106: ...ST 72 User s Manual Document UM 1007 Revision Level A 100...
Page 108: ...ST 72 User s Manual Document UM 1007 Revision Level A 102 Figure 6 4...
Page 128: ...ST 72 User s Manual Document UM 1007 Revision Level A 122 8 5 3 COPY CHANNELS Figure 8 7...
Page 129: ...ST 72 User s Manual Document UM 1007 Revision Level A 123 8 5 4 PROGRAMMABLE RELAYS Figure 8 8...
