Chapter 2 Specifications
2-9
2.3.3 ST402-AG41-24V
Serial Interface
RS-485 (MPI) Interface (X)
Recommended Connector : Dsub 9 pin pin-type XM2A-0901
<made by OMRON Corp.>
Recommended Cover : Dsub 9 pin cover XM2S-0913 <made by OMRON Corp.>
• RS-232C can be used to connect the ST with Devices/PLCs.
• Use inch type screw (#4-40UNC) as set screws.
Pin Connection Pin No. Signal Signal Name Direction
*1
*1 The connector of the ST side is socket type.
1 NC No connection -
2 NC No connection -
3 LINE(+) Line (+) In/Output
4 RTS Request Send Output
5 SG Ground -
6 5V 5V External Output
*2
*2 When providing power via the Seimens Corporation Profibus connector, power cannot be
connected to the Device/PLC.
Output
7 NC No connection -
8 LINE(-) Line (-) In/Output
9 NC No connection -
• This communication port is designed exclusively to be used for an MPI Direct Connection with
Seimens Corporation S7-200/300/400 Series PLCs.
• Use inch type screw (#4-40UNC) as set screws.
• This unit is not equipped internally with termination resistance. Attach termination resistance to
the cable. If there is no designation on the PLC side, attach 100Ω1/2W.
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