JRC JMA-3300 Series Installation Manual page 34

Chapter 3 INSTALLATION OF THE DISPLAY UNIT
3.3 INSTALLATION OF THE POWER CABLE (CFQ-5436)
When you directly connect with the ship's power supply without
using the optional rectifier, measure the voltage between the hull's
earth and the positive side of ship's power supply, and the hull's
earth and the negative side of this. And check voltage of 50 volts
or more is not required.
If voltage of 50 volts or more is required, take the measures which
do not require 50 volts or more between the above mentioned
terminals.
Connection without taking the measures causes system failure or
accident.
 Connecting the cable to the display unit
Connect the CFQ-5436 connector to the connector for which "POWER" is engraved at
the rear of the display unit cabinet.
Turn the plug attached to the connector until it cannot be turned any further.
Reference:
Improper power cable connection to ship's mains or rectifier may result in equipment
failure.
3-4
CAUTION
CFQ-5436 is connected here.