4. Device installation | 4.3 - Hardware construction | 49
4.3.4.1 RS-232 interface
Technical data
Name Data
External connection Plug connector, 26-pin
Number of channels 1
Type
RS‑232,
full duplex
Transfer rate 1200…38 K4 bit/s
Parity None, odd, even
Data bits 7/8 bits
Input signal level Logic 1 (high) -3 to -15V
Logic 0 (low) +3 to +15V
Output signal level Logic 1 (high) -5V to -15V
Logic 0 (low) +5V to +15V
Signals Input: Rx, CTS
Output: Tx, RTS
Potential isolation None
Cable gauge max. 1.5mm
2
Cable length max. 15m
Cable type Twisted pair, screened (e.g. LifYCY 3x2x0.20), 1pair
of wires for ground (GND).
Cable screen must be connected to the housing at
the rear wall or in the cable gland.