Display Unit: Nx-700A/B - Furuno NX-700B Service Manual

（
J401 25p D-sub connector
1 SD
14 RD
2 TD-A
15 TD-B
3 RD-A
16 RD-B
4 Alarm-H
17 Alarm-C
5 TEST TD-A
18 TEST TD-B
6 FRQ TD-A
19 FRQ TD-B
7 490 RD-A
20 490 RD-B
8 518 RD-A
21 518 RD-B
9 +12 VDC
22 0 V
10 GND ISO
23, 11, 24 DC +
12, 25, 13 DC -

2. Display unit: NX-700A/B

The specifications of the input/output of [RECEIVER] port of the Display unit:
NX-700A incorporating a printer and the [RECEIVER] port of NX-700B including LCD
unit alone are same, although SD/RD signals of #1 and #14 pins of the [RECEIVER]
port on NX-700A are not connected.
Pin No. Signal
1 SD
14 RD
2 TD-A
15 TD-B
3 RD-A
16 RD-B
4 Alarm-H
17 Alarm-C
5 TEST TD-A
18 TEST TD-B
6 FRQ TD-A
19 FRQ TD-B
7 490 RD-A
20 490 RD-B
8 518 RD-A
）
IN RS-232C external printer signal
(For NX-700B only, NC signal for NX-700A)
OUT
IEC61162-1/2: RS-485
IN
(INS Data output)
IEC61162-1/2: RS-485
OUT
(GPS data/INS Data input)
Photo MOS relay contact output for external alarm
IN
(50 VDC / 0.5 A max.)
OUT RS-485
OUT RS-485
IN RS-485
IN RS-485
IN
OUT +12 VDC to +24 VDC
Table 5.2.2 Specifications of Input/Output of Display unit
IN/OUT
OUT RS-232C external printer signal
(For NX-700B only, NC signal for NX-700A)
IN
IEC61162-1/2: RS-485
OUT
(INS Data output)
IEC61162-1/2: RS-485
IN
(GPS data/INS Data input)
PhotoMOS relay contact output for external alarm
OUT
(50 VDC / 0.5 A max.)
OUT RS-485
OUT RS-485
IN RS-485
IN RS-485
5-4
Specifications
5.2 Connection