AMC 1ACO, Инструкция по эксплуатации, Страница: 15 / 22

Gas Monitor 1ACO One-Channel Monitor
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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
Table 2 WARNING and ALARM Relay Active
State and shown in Figure 2, item 8
. Typically the “normally de-energized” position is
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 Normally
De-Energized Normally
Energized
Warning JB11 1-2 2-3
Alarm JB12 1-2 2-3
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 Output
Normal off
Warning (SW2-3 OFF)
off
Warning (SW2-3 ON) two long, slow beeps.
followed by short pause
Alarm four fast beeps, followed
by short pause
Any Sensor Fault short, slow beeps
Notes:
1) Micro-controller operation ensures that Warning, Alarm and
Fault conditions will not occur simultaneously on the same sensor.