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3.2 Connection of Modbus devices
Diagram
Connection must be carried out according to the following diagram. Refer to the
Electrical Installation Guide for the relevant VEX. (supplied with the VEX unit) for further
details of how to connect standard components to the connection box.
*Not supplied by EXHAUSTO
MHCW/MHCE
MXCU/MCCW
MPT DUCT
XXXXX
HMI
3.2.1 Cable (type, max. length and termination)
Cable
Max. cable length
Module for controlling heating coil (water or electric)
Module for control of coil with cold water supply.
Pressure measurement in duct
Can be different modules, e.g. MIO module or additional MPTDUCT
Control panel
EXHAUSTO recommends the use of 4-core, twisted pair, shielded cable. To limit
voltage drop across the cable, 0.25
correct connection of shielded cable to Modbus units, refer to the Electrical
Installation Guide for the relevant VEX.
The overall cable length of a complete installation may not exceed 200 m.
diameter conductor is recommended. For
12/90
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