LIT-R820_REV2-E03
4
0 To 135
Ω
Room Or Duct Thermostat Control
Dip switch position
S1 S2 S3 S4
0 to 135
Ω
control signal
On On Off Off
4 To 20 mA From a Building Automation System
Dip switch position
S1 S2 S3 S4
4 to 20 mA control signal
Off
Off
On
Off
Modulating R oom T hermos tat
0 to 135 Ohms
50
60
70
80
90
Modulating S upply A ir C ontrol T hermos tat
0 to 135 Ohms
50
60
70
80
90
4 to 20 mA
Modulating S ignal F rom B A S S ys tem
1
2
3
L1
2nd S S R
models only
L2
L3
on 3 pha s e
0 O hms = 0% capacity
135 Ohms = 100% capacity
R
W
B
1
2
3
L1
2nd S S R
models only
L2
L3
on 3 pha s e
-
+
4 mA = 0% capacity
20 mA = 100% capacity
