Connecting - ABB OTM C Series Installation And Operating Instruction

20
M O T O R I Z E D C H A N G E - O V E R A N D T R A N S F E R S W I T C H E S , O T M _ C
—

7. Connecting

Only an authorised electrician may perform the electrical installation and maintenance of
motorized change-over switches. Do not attempt any installation or maintenance actions
Warning
when a motorized change-over switch is connected to the electrical mains. Before starting
work, make sure that the change-over switch is de-energised.
—
7.1 Control circuit
3
11 14 12 23 24
M
PE N L
F 2
1 2
24 vdc
Do not connect to
any power supply
A B
Figure 7.1 Motorized change-over switch terminals
1. Terminal for motor operator voltage supply
2. Control terminal for push buttons or selector switch
3.
Terminal for state information of locking
Do not couple power for the control terminal. See the correct terminal for the power supply
in Figure 7.1
Information
The control voltage (output C = 24Vdc) on the control terminal is non-isolated,
see box 2 in Figure 7.1
Hazardous
voltage
When relay outputs are used with inductive loads (such as relays, contactors and motors),
they must be protected from voltage spikes using varistors, RC-protectors (AC current) or
Warning
DC current diodes (DC current).
LINE II
LINE I
LOAD
C
M M M M
M a n . M a n .
M a n .
1
F 2
L
P E N
+
-
3
2 4
1 2
2 3
1 4
1 1
2
0
I
I I
C