Furuno FM-8900S Operator's Manual page 122

APPENDIX 4 DIGITAL INTERFACE
[MULTI_SIO]
RS422_RXD
2 R
22
RS422_TXD
3 D
+3.3V
+3.3V
NMEA_RXD
4
5 PC400
J1 JUNCTION
13
MULTI_TD-A
14
MULTI_TD-B
15
MULTI_RD-A
16
MULTI_RD-B
Load requirements as a listener
Isolation: Optocoupler
AP-22
+3.3V
0.1µ
1
A 8
B 7
Y 5
Z 6
4
SN65HVD30DR
IEC61162-1
(default)
IEC61162-1
(default)
0.1µ
6
1
3
Input impedance: 430
J17
Z_149_3P
1
RS-422
2
3
J18
Z_149_3P
1
RS-422
2
3
0
(Not mount) (Not mount)
330
100
Max. voltage: ±15 V
10
10
10
10
100px4
Threshold: 4 mA