22
£
RS485 TERM (RS485 serial communications termination resistor)
Please note there are two RS485 connections to the unit, one non-iso-
lated and one optional, which is isolated.
The position of the termination link is important only if theRS485
serial communications are to be used, JP7 if the optional isolated
RS485 output and JP6 is for the non-isolated RS485 output. The two
units at the end of the communications bus should have this link set to the IN position. All other units
should have the link set to the OUT position. If only two control modules are on the communications
bus, set the links on both units to the IN position.
Final Checks
Before applying power, make the following checks:
The unit is set for the correct line supply voltage.
All other link positions are correct.
The fuse within the unit is intact and of the correct value.
All wiring and connections have been made according to the specifications detailed in this chapter.
JP6
IN
OUT
JP7
IN
OUT
