Control Data - Honeywell HD6 Series Installation Manual

3.1 FIELD WIRING, CONTINUED

3.1.2 Control Data

On standard HD6 units, a shielded twisted-pair RS-485 cable is required. See Figure 10
for jumper settings. Set Jumpers W3 and W4 in positions 1 & 2.
On HD6 units with the UTP option, one twisted-pair of UTP cable is required for data.
The data lines can be home-run wired or daisy-chain wired from the control output.
Home-run wiring is one scan per control output and the scan must be terminated.
Daisy-chain wiring is up to 32 scans per data run with the control output at one end of
the run or in the middle of the run. If the control output is at the end of the data run, the
last scan on the end of the data run must be terminated and all intermediate scans
unterminated. If the control output is in the middle of the data run, the last scan on both
ends must be terminated, and all intermediate scans unterminated. Jumper W1 on the
circuit board in the housing or pendant dome is used to terminate the data. Refer to the
following diagram.
The data cable shield should be carried through all units by connecting the cable shields
together, but do not connect the cable shield at the dome. Connect the cable shield at
the control unit.
Rev. 1.02 21 900.0696
1-Aug-06