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TEMPTRAC INTERFACE GUIDE, GATEWAY SETUP AND POINTS LIST
Page 2 of 30
PV7069-T 03/17
Part number 129209
OVERVIEW OF INTERFACE METHODS:
This document is a quick reference for connecting the TempTrac water heater / boiler control to a Building
Automation System (BAS). Direct connection via MODBUS RTU or using a gateway to interface to
protocols other than MODBUS RTU are the methods covered in this manual.
BAS to Heaters direct, using MODBUS RTU:
Building Automation System (BAS) connecting directly to water heaters using MODBUS RTU twisted pair
wire. (Wiring is RS-485 physical layer.)
BAS to heaters using a Protocol Gateway:
Building Automation System (BAS) connecting to a PVI gateway. This can provide interface to BACNET
MSTP, BACNET IP, LONWORKS, and MODBUS TCP.
(Wiring from gateway to heaters is RS-485 physical layer. Wiring from BAS to gateway will depend on
Protocol.)
BAS to heaters using discrete connections:
This is simply control of the heater using the external ENABLE/DISABLE contacts, remote equipment
contacts and the alarm contacts. See wiring diagram of equipment for details.
Other equipment
GATEWAY
PVI WATER HEATERS
BAS
Other equipment
PVI WATER HEATERS
BAS