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LocalTalk Serial Interface
B - 1
OL600e/610e/610e-PS/610e-S
Service Manual, P/N 59271602
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.
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
Abbreviation
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