Setting Communications Jumpers; Rs485 End Of Line And Biasing; Remote Zone Sensor Jumper 12 - Quest Controls BACnet T­Stat User Manual

Making changes in the Programming Page is straightforward and can be made by typing in the desired
value. All programming capabilities outlined earlier in the manual are reflected on this page. Sections
on the page include:
•
Heating & Cooling Setpoints
•
Schedule Selection
•
Alarm Options
•
System Mode Options
•
Calibrations & Lockouts
•
Stage Offsets & Differentials
•
Fan Proving & Local Override
Once all changes are completed, click the Save Changes button. Changes will be sent down via the
internet to the respective BACnet thermostat. Allow 5 minutes for the changes to take effect.
6.0 Setting Communications Jumpers
The jumpers are on the T‐Stat main board, remove the mounting plate and turn over the T‐Stat to locate
the jumpers. Refer to Figure 5 for jumper identification and settings.
6.1 RS485 End of Line and Biasing
Wiring of the RS485 network will require the use of End of Line and Bias Resistors. We have Jumpers J13
, J14 & J17 for this. Function is as follows to: enable the End of Line resistor (EOL) move jumper J13 to
pins 1 & 2 (UP). To enable line biasing the move jumpers J14 & J17 to positions 1 &2 (UP). EOL is
required for the last board in a daisy chaining. Biasing is only required if needed on the network.
Please note that jumper 13 is second from left, 14 is third and 17 is fifth (or last jumper).
6.2 Remote Zone Sensor Jumper 12
When a remote mounted Zone Temperature sensor is used, the T‐Stat
NOTE: Jumpers J15 & J16 are for future configuration and must be left in the disabled position on pins 2
& 3. The board will experience communications issues if those jumpers are moved.
BACnet T‐Stat User's Manual Rev 1.1, 7/28/11 Page | 11