5
COM2
Recommended Cable
Connector
XM2D-0901 <made by OMRON Corp.>
(AST3201-A1-D24 only)
XM2A-0901 <made by OMRON Corp.>
(AST3211-A1-D24 only)
Recommended Jack Screw
XM2Z-0073 <made by OMRON Corp.>
Recommended Cable Cover XM2S-0913 <made by OMRON Corp.>
Interfit Bracket
#4-40 inch screws are used.
Pin #
RS422/RS485
*1
(AST3201-A1-D24 only)
*1 RS485 is compliant with AST-3201A units with revision code “C” or later.
RS485 (MPI only)
(AST3211-A1-D24 only)
Signal Name
Meaning
Signal Name
Meaning
1
RDA
Receive Data A(+)
NC
⎯⎯
2
RDB
Receive Data B(-)
NC
⎯⎯
3
SDA
Send Data A(+)
LINE(+)
Line(+)
4
ERA
Data Terminal Ready A(+) RS(RTS)
Request to Send
5
SG
Signal Ground
SG
Signal Ground
*2
*2 In COM2 on the AST3211-A1-D24, the SG and FG terminals are isolated.
6
CSB
Clear to Send B(-)
5V
5V External Output
*3*4
*3 The 5V output for Pin #6 is not protected against overcurrent. To prevent damage or unit
malfunctions, use only the rated current.
*4 When providing power via the Siemens Co.'s Profibus connector, power cannot be connected to the
Device/PLC.
7
SDB
Send Data B(-)
NC
⎯⎯
8
CSA
Clear to Send A(+)
LINE(-)
Line(-)
9
ERB
Data Terminal Ready B(-)
NC
⎯⎯
Shell
FG
Frame Ground
(Common with SG)
FG
Frame Ground
*2
SEE
