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Appendix
RS-422/RS485 connection (CX9020-N031)
The CX9020-N030 system interface provides an RS
485 interface, COM1. It is implemented on a 9-pole
Sub-D socket strip. To connect to ELSA deceives
using RJ11 connectors, use the connection setup
illustrated below:
X000
X100
X102
0V
24V
X001
X101
X103
RS232
RS485
X200
DV1-D
TxD+/RxD+
Txd-/RxD-
TxD+
RxD+
Txd-/RxD-
TxD+/RxD+
For RS 485 pins 2 and 3 (data +) must be connected,
and pins 7 and 8 (data -).
Pin assignment of the COM interface
PIN
Signal
Type
2
TxD+
Data-Out +
3
RxD+
Data-In +
5
GND
Ground
6
VCC
VCC
7
TxD-
Data-Out -
8
RxD-
Data-In -
8
CX9020
X0 00
07 08
PWR
TC
24V
0V
01 02
+
+
-
-
-
-
-
-
HDD
HDD
PE PE
03 04
EL2004
BECKHOFF
RxD-
RxD-
1
2
3
4
5
6
Description
Transmit 422
Receive 422
Ground
+5 V
Transmit 422
Receive 422
1
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