
NOTICE!
Risk of damaging the terminal base!
Excessive current might damage the clamp and terminal base.
Make sure that the current flowing through the removable clamps never
exceeds 8 A (with 1.5 mm
2
conductor).
Serial Interface COM1
Serial Interface
Pin
Signal
Interface
Description
Terminal
block
removed
Terminal
block
inserted
1
Terminator P
RS-485
Terminator P
2
RxD/TxD-P
RS-485
Receive/Transmit,
positive
3
RxD/TxD-N
RS-485
Receive/Transmit,
negative
4
Terminator N
RS-485
Terminator N
5
RTS
RS-232
Request to send
(output)
6
TxD
RS-232
Transmit data
(output)
7
SGND
Signal Ground
8
RxD
RS-232
Receive data
(input)
9
CTS
RS-232
Clear to send
(input)
The serial interface COM1 is connected to a removable 9-pin terminal block. It is configurable
for RS-232 and RS-485.
NOTICE!
Unused connector!
Make sure that the terminal block is always connected to the terminal base,
even if you do not use the interface.
For a detailed description of COM1, please refer to Serial interface COM1
“Serial Interface COM1 of the Terminal Bases” on page 1278
.
Serial Interface COM2
The serial interface COM2 is connected to a D-sub 9. It is configurable for RS-232 and RS-485.
COM2 cannot be used for communication via CS31 System Bus. For a detailed
description of COM2, please refer to Serial interface COM2.
“Serial Interface COM2 of the Terminal Bases ” on page 1280
Pin assignment
Device Specifications
Processor Modules > AC500 (Standard)
2019/04/17
3ADR010121, 13, en_US
84