5
RG-MHLON
Drive Setup & Programming
2.3 Serial Communications Wiring
Figure 2 illustrates one method of wiring the MCH Series LonWorks® Bus Connector with an optional
switch to provide remote operation of the service pin.
Optional Switch
MCH LonWorks Bus Connector
1
2
3
4
5
Shield
Ground
Remote Service Pin
Net A
Net B
(For remote
operation of
service pin
)
Figure 2: Wiring the MCH LonWorks® Bus Connector
Net A, Net B
This is the 2-wire LonWorks bus designed according to the LonMark® design guidelines.
The bus is of non-polarization character and supports line-powered networks.
Service Pin
This pin is used for the (optional) remote functionality of the Service Pin pushbutton. Refer
to Figure 2 for an illustration on how to wire this.
Ground
This pin is used for the remote Service Pin functionality. Refer to Figure 2.
Shield
This pin should be connected to the shield of the LonWorks cable, in cases where such
cable is to be used. The pin is connected to the Ground terminal (2) on the communications
module through an RC-filter.
