Pin assignments appendix c – Rockwell Automation 1770-M12 Mass Storage Systems User Manual
Page 56

Pin Assignments
Appendix C
CĆ3
Pin Number
Abbreviation
Signal
15
Incoming Call
IC
16
Select Frequency/Signaling Rate Selector
SF/SR
1
17
Terminal Timing
TT
18
Test Mode
TM
19
Signal Ground
SG
20
Receive Common
RC
21
Spare
Spare
22
Send Data
SD
23
Send Timing
ST
24
Receive Data
RD
25
Request to Send
RS
26
Receive Timing
RT
27
Clear to Send
CS
28
Terminal In Service
IS
29
Data Mode
DM
30
Terminal Ready
TR
31
Receiver Ready
RR
32
Select Standby
SS
33
Signal Quality
SQ
34
New Signal
NS
35
Terminal Timing
TT
36
Standby Indicator
SB
37
Send Common
SC
1
Circuit SF and Circuit SR share the same contact number.
Reference: Electronic Industries Association RS-449
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