
2 Connection
Extension Board for MODBUS on SMARTCON Control Unit
DS-ENGLISH-MODBUS-V2.01-2019.05.15
renders the bus in this strand inoperational. Therefore, it is advised to use active bus termination through a
dedicated device.
The single-channel version of SMARTCON is connected to MODBUS-RTU via channel I. The dual-channel
version (Option: redundant) is connected via channel I and II.
2.1.1
Connection Board (customer end)
The connection board is situated in the connection compartment under the topmost cover.
Figure 1:
Connection Board
2.1.2
Connecting to MODBUS-RTU
Recommended Cable Confectioning
Prior to connection the bus lines are to be confectioned as seen in the figure below:
The clamps on the connection board are designed for a maximum line cross-section of 1.5mm
2
. The line
diameter has to be in the range of 5 to 8 mm.
2