4 Specifications
4.1 RS-485 interface
The connection to the other devices must be established via a twisted shielded bus
cable. The order of the devices among each other is arbitrary. For reasons of electro-
magnetic compatibility, the shield must be connected at both ends to a large area and
to be connected in a good conducting manner to the protective end. The wiring must
be in a bus structure. Branch lines longer than 5 m should be avoided. The two ends
of the bus line must be terminated with a resistance of 120
Ω
.
Description
Value
Unit
Norm
RS-485
Baudrate
19200
Baud
Data bits
8
Stopbits
1
Parity
even
Protocol
Modbus RTU
Max. Cable length
1200
1
m
1
This is only a guideline. The actual line length may vary depending on cable quality and interference
on the transmission path down or up.
4.2 Supply
4.2.1 AC Supply
Description
Min
Rated
Max
Unit
Voltage
50
230
253
V AC
Frequency
40
50
60
Hz
Power consumption
2,5
VA
4.2.2 DC Supply
Description
Min
Rated
Max
Unit
Voltage
1
20
24
253
V DC
Power consumption
1.5
W
1
The polarity of the voltage at the connection terminals must be observed.
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