User manual

Digital Monitor AMC-1DBx Series User Manual
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4.1.2.10 External Buzzer and Annunciator
An off-board audio alarm is provided with a buzzer located on the side of the enclosure.
Facilities are provided to drive a secondary audio alarm. The audio alarms are activated
with on-board relay drivers.
Connection for the audio alarm is facilitated with terminal block J26 and the External
Annunciator is provided with terminal block J38.
Refer to
Figure 4-3: Digital Monitor Components for the location of J38.
Figure 4-10 External Annunciator Connector
Table 4-10 shows the pin-out for the audio alarm and terminal block.
Table 4-10: Audio Alarm and Terminal Block Pin-out
Pin Signal
1 +24V (up to 1.0A)
2 Open Collector to ground
4.1.2.11 System Fail Relay
A fault relay is provided on the monitor. The fault relay is a normally energized relay. A
power failure will place it in the state which indicates a fault. The software places this
relay in the active state (de-energized) upon a failure being detected from any of the
sensor/transmitters.
The fail relay outputs are available on terminal block J24. The relay is rated for 1A at up
to 42VDC/30VAC.
Refer to