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%Appendix B LOCALTALK (RS422) SERIAL INTERFACE
(OL610e/PS only)
Appendix B LOCALTALK (RS422) SERIAL INTERFACE (OL610e/PS only)
1) Connector
• Printer side : 8-pin mini DIN receptacle Type TCS7187-01-201 (made by HOSHIDEN) or equivalent •
Cable side : 8-pin mini DIN plug Type TCP7180-01-110 (made by HOSHIDEN) or equivalent
2) Cable
• To be shielded cable • Cable length LocalTalk Defined max. length : 1,000 ft. (305 m)--maximum length
for a LocalTalk network. Recommended max. length : 10 ft. (3 m) (For noise prevention) RS422 : 6 ft.
(1.8 m) max.
3) Interface signal
Pin No. Signal Name Abbreviation Signal Direction Description
1 (Not used)
2 Sync. signal SYNC
PR
(Not used)
3 Transmit data
minus
TxD-
PR
Transmit data minus
polarity
4 Signal ground SG Signal ground
5 Receive data
minus
RxD-
PR
Receive data minus
polarity
6 Transmit data
plus
TxD+
PR
Transmit data plus
polarity
7 (Not used)
8 Receive data
plus
RxD+
PR
Receive data plus
polarity
• Connector Pin Arrangement
(As viewed from the cable side)
4) Signal level
Differential output : ±5V Differential input : ±7V
5) Interface circuit
a) Receiving circuit
OKI OL600/610ex (96-01-18