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H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS
3 63-2579—3
WIRING
For voltage output, shielded cable (16-22 AWG) should
be used.
For current output, either shielded cable or twisted pair
(16-22 AWG) can be used.
NOTE: When using shielded cable, ground the shield
only at the controller end (see Fig. 2). Grounding
both ends can cause a ground loop.
The 20K ohm NTC temperature output is accessed
through the separate blue and green wires (located inside
the enclosure).
Fig. 2. Typical wiring diagram for transducer with two-
wire mA output and external DC power supply.
Fig. 3. Humidity sensor (0-10 Vdc output) wiring with T7350
(use with RH/Temperature combination T7350 units only).
mA OUTPUT
TRANSDUCER
ONLY
18 TO 36 Vdc
POWER SUPPLY
CONTROLLER, METER
OR RECORDER
INPUT SIGNAL
COMMON
Vin +
+
Io –
–
M22528
GROUND
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
HC AND HP PROVIDE 24 VAC TO THE HUMIDITY SENSOR.
1
M22529
2
3
2
3
4
5
5
RCX
T7350
SUBBASE
W1 G
T7770 REMOTE SENSOR
Y1
W3/Y4 Y3 W2
Y2
AUXRH
T5 T6 T7 T4
T3
DISCHARGE
AIR
SENSOR
OUTDOOR
AIR
SENSOR
MOTION
SENSOR
HUMIDITY SENSOR
M
OSOS ASAS
MHC HP
HS
Gnd Vin
(Vac)
Vo
(0-10 Vdc)
1
4
L1
(HOT)
L2
COMPRESSOR
CONTACTOR 1
COMPRESSOR
CONTACTOR 2
HEAT
RELAY 1
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FAN
RELAY
ECONOMIZER
HEAT
RELAY 2
COMPRESSOR
CONTACTOR 3
COMPRESSOR
CONTACTOR 4