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Appendix I
K3Tj Intelligent Signal Processor Protocol
285
Connections
The connections used for the K3Tj Intelligent Signal Processor Protocol are shown below.
RS-232C Connections
Serial Commu-
nications Board
RS-232C port
K3Tj
CQM1H
Signal name Abbreviation Signal
direction
Pin No.
Protective ground or earth FG – 1
Signal ground or common return line SG – 7
Send data SD Output 2
Receive data RD Input 3
Request to send RS Output 4
Clear to send CS Input 5
Data set ready DR Input 6
Data terminal ready ER Output 20
Serial Communications
Board
Shielded cable
Intelligent Signal
Processor
MAX232C or
equivalent
Signal
Name
Pin
No.
Signal
Name
Termi-
nal
.
RS-232C: D-sub
9-pin female
RS-232C:
Terminal block
Note 1. The connection configuration is a one-to-one configuration and the maximum cable length is 15 m.
2. Use shielded twisted-pair cable (AWG28i or greater).