S&C Instruction Sheet 768-550 15
Installation
Figure 13. Connect external ac control power to the fuse block.
Connecting Control Power
CAUTION
Make sure the control cable is grounded be fore con-
necting user-supplied 120 Vac .
STEP 12.
For Type CCU-SP:
The communication and control unit is pow ered by
the S&C Voltage Sensor on the Scada-Mate Switch.
All control power connections are pre-wired.
External ac control power should not be used to
continuously power the device except when options
“U1” or “U3” are supplied and also in certain custom
designs where adequate surge protection and isola-
tion are provided.
In all other instances, the “external ac” input
on the S&C Battery Charger is for use only when
configuring the remote terminal unit in accordance
with the remote terminal unit instructions. Refer
to the included wiring diagram for connections
if “external ac” is required. Note: On the S&C
Battery Charger, Pins 34 and 35 are for exter nal ac
input. Terminal 34 is the line terminal.
For Type CCU-XP:
The communication and control unit is pow ered by
user-supplied 120-Vac control power. To connect
control power, attach the line and neutral to the
terminals on the bottom of the fuse block. See
Figure 13. Then, con nect the ground wire to the
left side plate. Refer to the wiring diagram for
details. The unit is energized when control power
is connected. Batteries are shipped disconnected
and can be connected when the con trol unit has
ac power.
