6
Sensor Wiring for Outdoor Sensor
• Replace the front cover of the sensor enclosure .
Wires from
outdoor
sensor and
sensor
common
terminals
on tekmar
®
control
At the Interface:
• Connect the outdoor sensor to terminals
6 and 7 .
The 681 requires the outdoor air temperature
sensor if the BAS is not providing an outdoor air
sensor . Connect the Outdoor Sensor 070 (sold
separately) to terminals 6 and 7 . If the BAS has
an outdoor air sensor, this data can be shared
with the 681 through BACnet .
681 Electrical Schematic
Legend
S1 = tekmar Snow/Ice Sensor 090
S2 = tekmar Outdoor Sensor 070 (Optional)
S3 = tekmar Snow Sensor 095
S4 = tekmar Slab Sensor 072
-A, +B, G: BACnet MS/TP Communication
SD Card: FAT 32, 32GB
24 V (ac) ±10%, 50 and 60 Hz, 17 VA Class 2
S1
S2
S3
S4
24 V(ac)
MS/TP BAS Connection