Omni30 User Manual
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UMC1620AR04
3. ELECTRICAL INSTALLATION
3.1 Introduction
All electrical connections to the Omni30 units are made on the rear of the unit on plug-in
terminals provided.
The following connection diagrams show the terminations provided on each of the Omni30
product types:
3.2 Omni30 Alarm Input Connections
Inputs to the Omni30 Annunciator must be potential free contacts.
Input contacts to the Alarm Modules can be either Normally Open or Normally Closed. This is
dependent upon the way they are wired, and the position of the NO/NC switches.
Normally Open Contact Inputs have a common negative with the relevant NO/NC switch OFF.
Normally Closed Contact Inputs have a common positive with the relevant NO/NC Switch ON, as
shown in the wiring diagram below.
Inputs may be mixed Normally Open/Normally Closed on a single module.
A Group Alarm Output and Lamp Repeat outputs are optional on each Alarm Module. Leave
these terminals unconnected if these functions are not used.
:
N
C
+
N
O
-
IP
4
IP
3
IP
2
IP
1
L
M
P
4
L
M
P
3
L
M
P
2
L
M
P
1
G
P
+
2
4
V
Normally Open
Alarm Input
Contacts
Normally Closed
Alarm Input
Contacts
Optional
Repeated
Lamps
Optional
Group
Alarm
Output
1 2
3 4
ON
On for N.C
Figure 3-1 –Omni30 Alarm Connections
