Alarm Relay Programming; Audio Alarms - AMC 1ACO Instructions Manual

4.4 ALARM RELAY PROGRAMMING

The WARNING and ALARM relays may be configured as normally energized or normally de-
energized with the jumper straps identified in
State and shown in Figure 2, item 8
employed, activating the relay when an alarm condition is detected.
The "normally energized" position is selected when failsafe operation is required. For example,
the requirement is that when power to the Gas Monitor is lost, the load connects to a power
source via contacts of this, normally energized relay.
Table 2: WARNING and ALARM Relay Active State
Relay Jumper
Warning JB11
Alarm JB12

4.5 AUDIO ALARMS

An audio alarm output is provided, which produces various alarm sounds, as shown in the chart
below. The audio alarm can be disabled by turning OFF the DIP-switch SW2-7.
Table 3: Audio alarm operation
Sensor Status
Normal
Warning (SW2-3 OFF)
Warning (SW2-3 ON)
Alarm
Any Sensor Fault
Notes:
1) Micro-controller operation ensures that Warning, Alarm and
Fault conditions will not occur simultaneously on the same sensor.
Gas Monitor 1ACO One-Channel Monitor
. Typically the "normally de-energized" position is
Normally Normally
De-Energized Energized
1-2 2-3
1-2 2-3
Table 2 WARNING and ALARM Relay Active
Output
off
off
two
followed by short pause
four fast beeps, followed
by short pause
short, slow beeps
13
long, slow beeps.