GHM Delta OHM HD2013.3, Operating Manual

Page: 7 / 26

HD2013.3
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V1.2
Connector Function
Wire color
CP2013.2… cable
1 Voltage-free contact Green
2 Power supply positive (+Vdc) Red
3 RS485 B/+ White
4 Voltage-free contact Blue
5 RS485 A/- Brown
6 Analog output positive Yellow
7 Power supply negative (GND) Grey
8 Serial ground Black
To ensure a good noise immunity, it is recommended to connect the cable shield to
ground (GND).
RS485 connection:
By default, the instrument has MODBUS address 1 and communication parameters
19200, 8E1. Different parameters can be set using the proprietary protocol or the
MODBUS-RTU protocol.
Fig. 3.3: RS485 connection
Current analog output:
By default, the current analog output is 4…20 mA, with:
4 mA = sensor sensitive surface completely wet
20 mA = sensor sensitive surface completely dry
With the commands of the proprietary protocol it is possible to set the range 0…20 mA
for the output and reverse the direction of the output, so that when the sensor sensi-
tive surface is completely wet the output is 20 mA.
In case of measurement error, the output goes to 22 mA.
Power supply
12…30 Vdc
Red
Grey
Brown
White
CP2013.2… cable
PLC, data logger or
RS485/USB or RS485/RS232
converter for PC
Other sensors with
RS485 output
Termination
Termination