TEMPTRAC INTERFACE GUIDE, GATEWAY SETUP AND POINTS LIST
Page 7 of 30
PV7069-T 03/17
Part number 129209
WIRING OF TEMPTRAC TO BAS (Direct, no Gateway):
The back side of the TempTrac has a white header with an 8 inch cable, connecting to an orange adapter
module with 2 green terminals labeled (+) & (-). This is the RS-485 Modbus connection point.
Field connection
for BAS
TempTrac
Orange adapter
TempTrac #2
Orange adapter
Testing
VDC
Results for proper
hookup
RS 485 +
(+)
(+)
Positive
lead
+ 0.100
To
+ 5.500
RS R85 -
(-)
(-)
Negative
lead
GND
Ensure the proper polarity, check with a Digital Volt Meter set to Volts DC. Take a reading at the orange
adapter from the (-) Terminal to the (+) Terminal. The (+) should be the positive lead when connected.
GATEWAY CONFIGURATION CONNECTION:
Both the LONWORKS and BACNET gateway have an Ethernet port. Connect the computer using a patch
cable or cross-over cable to establish a direct connection to the gateway. Older units may require a cross-
over cable or two patch cables with an Ethernet switch. If using BACNET IP or MODBUS TCP interface,
connect the BAS Ethernet cable to the gateway when configuration is complete.
At this point, each heater and the gateway should all be powered, and have all wiring finished. The RUN
LED will toggle every second to indicate the gateway is running.