Motorola ACE3600 RTU Owner's Manual page 226

Programmable remote terminal unit
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Connector Name
Power In 10.8-16V DC
Description
Cable inlet for main power cable
(DC)
19-3
Expansion Power Supply Module
Notes
Connect this input to the
"RACK EXP" output of a
regular power supply or to the
"Expansion power out" of an
expansion power supply, using
a dedicated cable - FKN8559A
(3002360C26.)
Important: When adding
expansion power supplies, make
sure that you do not exceed the
total power limit of the main
power supply, as all connected
expansion power supplies drain
energy from it. Also make sure
that the power provided to each
power supply (when connected
in a daisy-chain manner) does
not fall below the minimum
operating voltage.
It also controls a dedicated 12V
DO power line that is available
to all the slots in the frame to
power the relay coils.
The expansion power supply
may be attached via DC cable to
the power supply on the
previous I/O expansion frame in
a daisy-chain manner, or
directly to the main power
supply. In this case, the 12V
DO control on the main power
supply can control all DO EE
relays in the entire RTU that
were configured by dip switch
for 12V DO. This enables the
user to inhibit all DO EE relays
in the entire RTU simply by
removing the plug from the 12V
DO control in the main power
supply.

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