4. Device installation | 4.3 - Hardware construction | 54
4.3.4.2 RS-485 interface
Technical data
Name Data
External connection Plug connector, 26-pin
Number of channels 1
Type
RS‑485,
full duplex
(4‑wire)
RS‑485,
half duplex
(2‑wire)
Transfer rate 1200…38 K4 bit/s
Signals TxA, RxA, TxB, RxB
Potential isolation no
Cable gauge max. 1.5mm
2
Cable length max. 1000m
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.
Block diagram