dormakaba 8900 EMR Installation Instructions
08280990
03-2020
8900 EMR
9
Wiring: power supply 120 VAC 50/60 Hz
Wiring: power supply 24 V AC/DC
4.2 Power supply 120 VAC, 50/60 HZ
Fig.10
120 VAC, 50/60 HZ: Connect the 120 VAC incoming voltage wires to the primary wires of the transformer.
Connect the secondary transformer wires to terminals #3 and #14 of the detector module. This connection is
not polarity dependent.
SD-2
Secondary
Transformer
Wires
13
12
1
8
2
9
10
3
4
5
6
7
15
14
11
Primary
Transformer
Wires
120VAC
Power
Input
External
Step
Down
Transformer
(Optional)
Note: For ULC installation,
transformer must install in 4” x 4”
electrical box x 3” deep minimum.
4.3 Power supply 24V AC/DC
Fig.11
24V AC/DC: The step down transformer is not used in this connection. Connect 24V AC/DC power to
terminals #3 and #14 on the detectors. These connections are not polarity dependent. If the unit is
connected to a second unit, connect terminal #3 of the first unit to terminal #3 of the second unit and
connect terminal #14 of the first unit to terminal #14 of the second unit. Continue this process for any
subsequent units to be powered from the same power supply.
SD-2
SD-2
SD-2
13
12
1
8
2
9
10
3
4
5
6
7
15
14
11
13
12
1
8
2
9
10
3
4
5
6
7
15
14
11
13
12
1
8
2
9
10
3
4
5
6
7
15
14
11
(3)
(2)
(1)
24 VAC/DC
power supply
+
-
