Furuno FAR-2107 Series Service Manual page 416

The figure below is the block diagram of connection of RCU-013 and RCU-014. See
page.4-58 for information of System Fail.
SPU
p.c.b
RS422 I/F
U21
MAIN CPU
ALARM 3 OPERATOR FITNESS
The second control unit to be connected is RCU-016.
If RCU-014 or RCU-015 is connected as the second unit, the following operations are
disabled form the second unit.
- The power cannot be turned on and off
- A key beep does not sound.
- Key lighting cannot be used.
For these reasons, use RCU-016 to be connected as the second control unit.
RPU-013
KEY
J602
KEY TXD H/C
1, 2
KEY RXD H/C
3, 4
PWR 5
p.c.b
6, 8
12V
TERMINAL 7
p.c.b
SYS FAIL H
9
SYS FAIL C
10
J622
1
GND
2
KEY
11
12
EXT ALARM ACK N
9
1
ALARM 1 ALARM 2
to
8
J612
EXT ALARM
Fig. 7.4.2 Block diagram of connection
7-72
RCU-014
PROCESSOR
U6
J501
(RS422 I/F)
TD UP H/C
TX/RX 0
1, 2
RD UP H/C
3, 4
PWR SW
5
GND
6, 8
POWER SW
12V IN
7
SYS FAIL H
9
4
1
SYS FAIL N
SYS FAIL C
10
3 2
U12
(PS7241 1B)
SYS FAIL H
1
SYS FAIL C
2
U14
SYS ACK N
SYS ACK H
3
GND
4
J507
SYSTEM FAIL
7.4 Control Unit
REMOTE
U6
J502
(RS422 I/F)
TD DN H/C
TX/RX 1
1, 2
PROCESSOR
RD DN H/C
3, 4
5
S36
(DIP SW) GND
6, 8
12V IN
U8
7
CPU
U9
BZ
9
SOUND
10
RADAR OK
1
GND
2
J506
EMRI
KEY &
ILLUMI
Rotary
Encoder
RCU-016
REMOTE