JRC jue-87, Instruction Manual, Page: 42 / 230

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2.2.4 EXT PSU (External Power supply Unit: NBD-904)
The EXT PSU (NBD-904) supplies DC+24V for IME-EME and Printer from Ship’s power source
(from 100 to 240V AC) and/or +24V DC.
When both AC and DC power source are connected to the EXT PSU and the power interruption of AC
power source is occurred: EXT PSU switches over from AC power source to the DC power source
automatically (Power failure detecting function).
The input of the AC power supply of EXT PSU is AC wide range 100- 240V.
Fig.2.2.5 EXT PSU
2.2.5 JB1 (Junction Box 1: NQE-3222)
Fig.2.2.6 JB1