User Guide

Honeywell • 24 INSTALLATION
4
If SmartVFD HVAC/SmartDrive HVAC AC drive is the last device on the bus, the bus
termination must be set. Locate the DIP switches to the right of the control keypad of the
drive and turn the switch for the RS485 bus termination resistor to position ON. Biasing
is built in the termination resistor. See also step 6 on page 25.
5
Unless already done for the other control cables, cut
free the opening on the AC drive cover for the RS485
cable (protection class IP21).
NOTE! This is only a principle drawing and the actual
drive may look different.
6
Remount the AC drive cover and run the RS485
cables as shown in picture.
NOTE! When planning the cable runs, remember to
keep the distance between the fieldbus cable and the
motor cable at a minimum of 30 cm.
RS-485 bus termination
OFF
ON
9110.emf
9201.emf
9202.emf
Fieldbus
cables