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B - 1
Appendix B LOCALTALK (RS422) SERIAL INTERFACE
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) (It is the 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.
1
2
3
4
5
6
7
8
Signal Name
Sync. signal
Transmit data minus
Signal ground
Receive data minus
Transmit data plus
Receive data plus
Abfreviation
SYNC
TxD-
SG
RxD-
TxD+
RxD+
Signal Direction
PR
PR
PR
PR
PR
Description
(Not used)
(Not used)
Transmit data minus polarity
Signal ground
Receive data minus polarity
Transmit data plus polarity
(Not used)
Receive data plus polarity