Selectron CPU 723-T User Manual

CPU 72x
24.05.2019 page 11
1.4.3.2 RS-232C
The serial interface RS-232C can be used as data or programming interface.
The connection of the RS-232C interface ensues via the 3 pole connecting terminal (RXD,
TXD and COM).
The maximum bit rate is 38.4 kbit/s.
RS-232C
CPU 723-T, CPU 725-LT/LTH and CPU 727-T/TH
Galvanic separation
RS-232C  logic
Yes
1)
RS-232C  CAN
Yes
1)
RS-232C  UC
Yes
1)
RS-232C  ground
Yes
1)
Test voltage
560 Vac, 800 Vdc
Bit rates
setting via DIP switch S1 and/or software
Driver
Level according ISO 11898 standard
1)
simple insulation
Fig.10: RS-232C wiring
1.4.3.2.1 Installation Remarks
To fulfill the EMC standards (89/336/EEC and EN 50081-2/EN 50082-1) the following point
is to consider at wiring:
RS-232C cable screening to connect on a large area by means of the strain reducing clip
of the CTA 703-T.
IMPORTANT
Do not connect screen on the peripheral side (e.g. PC) with the ground.
TxD RxD COM

Selectron CPU 723-T Specifications

General

Brand	Selectron
Model	CPU 723-T
Category	Computer Hardware
Language	English