Omni30 User Manual
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UMC1620AR04
3.4 Omni30 Common Service Connections using external Horn and Pushbuttons
2
4
V
+
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H
O
R
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K
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P
D
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+
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O
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N
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K
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P
D
P
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+
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-
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R
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P
D
P
24Vdc Supply
connected to
centre unit
Horn Relay
with flyback
diode
T
e
st
A
ck
R
e
s
e
t
Alarm
Module
Alarm
Module
Alarm
Module
Figure 3-3 – Omni30 Common Service Connections using External Pushbuttons
3.5 Creating two First Out Groups using a single Control Module
Some of the alarm sequences selectable in the Omni30 are “First-Out” alarm sequences.
This means that the flashing sequence is such that the first alarm to occur in the group will
flash differently to all subsequent alarms to allow the operator to identify which alarm
occurred first.
Up to 16 Omni30’s may be connected together into a single First-Out group. Wire the P and
DP Terminals between modules to create a single First Out Group.
The Control Modules accommodate up to 2 First Out Groups using the two terminal pairs
P+DP and P2+DP2. By interconnecting Alarm Modules as shown the diagram below, a
single Control Module can be used to control two independent First Out groups.
