Power Supply; Power Supply Specifications; Power (05P0874): Common; P-Sw (05P0871): Common - Furuno FS-1575 Service Manual

7.7 Power Supply

When two Control units are installed, the system power is turned ON from the No. 1
Control unit. Since "FL41" is not mounted on the T-IF board, the PWR ON signal from
the No. 2 Control unit is not connected to the P-SW board, and thereby the system
power is not turned ON from the No. 2 Control unit. Consequently, to install two
Control units, be sure to install the No. 1 Control unit on the hardware.
Board Name
FET 05P0872
POWER 05P0874
SW REG 05P0873
P-SW 05P0871

7.7.1 Power Supply Specifications

1. POWER (05P0874): Common

The POWER board uses 24V power outputted from the P-SW board to generate 15V
and 5V power with the switching power supply.
The 15V power supply outputs a current up to 14A, while the 5V power supply outputs
a current up to 2A.

P-SW (05P0871): Common

2.
The P-SW board consists of power supply input ON/OFF (Max. 40A) protection,
low-voltage/over-voltage lockout and reverse connection protection circuits for input
power supply, and BK 24V power supply and 12V OVEN power supply used to start
the power supply block. BK 24V is supplied to the input power supply through the
PolySwitch (overcurrent protection switch).
1) Reverse connection protection for input power supply: Automatic resetting
2) Low rvoltage lockout for input power supply: 18 to 20V, automatic resetting
3) Overvoltage lockout for input power supply: 33V, automatic resetting
4) BK24V output: 24VDC / 1A at maximum (PolySwitch)
5) 12V OVEN output: 12VDC / 500 mA at maximum
3. SW REG （05P0873)： FS-2575 and FS-5075
The SW REG board generates 42V PA VC. This 42V power is generated by adding 24V
input power to 18V power outputted from this SW REG board. Furthermore, the SW
REG board has a built-in overcurrent (19A) protection circuit.
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Table 7.7.1 Configuration of Power Supply Block
Type
FS-1575
7-67
Applicable Model
FS-2575 FS-5075
7.7 Power Supply