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HR 12 M
ANUAL
Manual version 1.0 (15-07-2018)
2.5.2 Wiring
A twisted-pair cable must be used for connection to the Mod-
bus system. The cable must also have a third core for the
GND (grounding). Normally, a four-pole, twisted-pair cable is
used; one pair is used for communication and one core from
the other pair is used as the GND.
Modbus A = -
Modbus B = +
GND = ground
Note:
n
If there is no communication, this may be caused by
incorrectly connected wiring. Swap the A- and B+
wires.
2.5.3 Connecting the unit to Modbus
2. Lay a cable between the Modbus system and the unit.
3. Lead the cable into the electronic housing.
4. Connect the cable to terminal X382 1 of the unit's con-
trol circuit board, in accordance with the wiring diagram
supplied.
Note:
n
The b-touch control panel is no longer necessary for
the operation. After going through the installation
guide, it can be removed. However, make sure to
keep it to be able to adjust the settings in a later
stage.
en
I
NSTALLATION
en-15
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