TR21, TR22, TR23, AND TR24 WALL MODULES
TR21-J MODEL
1
TERMINAL
BLOCK
1
2
3
4
LONTALK
CONNECTOR
(TR21-J MODEL ONLY)
1
COMPONENTS VARY WITH MODEL. SEE TABLE 1.
2
NUMBER OF TERMINALS VARIES WITH MODEL.
3
FACTORY USE ONLY. DO NOT ATTEMPT TO ADJUST.
DIP SWITCH S1 IS USED FOR HUMIDITY MODELS (TR21-H AND TR23-H) ONLY.
4
5
SECOND SWITCH (2) ON DIP SWITCH S2 IS FOR FACTORY USE ONLY.
Table 2. TR21, TR22, TR23, and TR24 Wall Module Terminal Connections.
When
Wall
Used With
Module
Controller
Model
Model(s)
TR21
TR21-A
W7761
TR21-H
TR21-J
• W7750,
TR22-F5
W7751,
TR23
W7752,
and
TR23-N
W7753
• Excel 600,
T24
500, 100,
and 80
TR23
TR23-F3
TR23-F5
W7753
TR23-H
T24
63-1321ES—06
TR21 AND TR21-A
MODELS
1
1
2
2
(TR21-H AND TR23-H ONLY)
Fig. 3. Wall module circuit board components.
LON
LON
b
c
GND
Sensor
+
–
1
2
3
4
TR21-H, TR22, TR23, AND TR24 MODELS
3
FACTORY
HUMIDITY
POTENTIOMETER
1
2
3
3
FACTORY
TEMPERATURE
SETPOINT
POTENTIOMETER
HUMIDITY
SENSOR
LONTALK CONNECTOR
Terminal Usage and Number (See Fig. 3 on page 4)
SETPT
Override
(Setpoint)
Return
LED
5
6
7
4
4
5
6
7
8
9
10
11
12
ON
ON
1 2
1 2
S1
S2
ON
1 2 3
S3
FAN SWITCH
a
LED
Override
Return
/ Fan
Override
8
9
10
Fan
Fan
Fan
1
2
TERMINAL
BLOCK
DIP
4
SWITCH
S1
DIP
5
SWITCH
S2
DIP
SWITCH
S3
LED
OVERRIDE
(BYPASS)
PUSHBUTTON
M28140
18-24
d
Humidity
Vac
11
12