C7600B, H7655A
Solid State Humidity Sensors
PRODUCT DATA
FEATURES
• Long-lasting solid state sensing element is accurate
and stable over time.
• Enclosed in rugged, wall-mounted plastic case.
• Vents on top and sides of cover allow air flow to
humidity sensing element.
• Compact size and lightweight construction provide
easy mounting.
• C7600B provides 2-10 Vdc output directly proportional
to relative humidity and can be used with the H775
Humidity Controller.
• H7655A provides 0-10 Vdc output directly proportional
to relative humidity and can be used with the T7350
Temperature/Humidity Controller.
APPLICATION
C7600B, H7655A Solid State Humidity Sensors senses the
relative humidity level of an area and is used with any
controller capable of processing a 0-10 Vdc or 2-10 Vdc
signal.
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
an individual unit may not exactly match the listed
specifications. Also, this product is tested and
calibrated under closely controlled conditions and
some minor differences in performance can be
expected if those conditions are changed.
Models: C7600B, H7655A Solid State Humidity Sensors.
Provide a dc voltage output in direct proportion to the
change in relative humidity.
Dimensions: See Fig. 1.
Case: Rugged, lightweight, compact plastic, easy to install.
Electrical Ratings:
Input: 16-40 Vdc or 16-30 Vac.
Output:
C7600B: 2-10 Vdc voltage signal; increases from 2 to 10
Vdc as humidity increases. Output voltage is directly
proportional to relative humidity increase. See Fig. 2.
H7665A: 0-10 Vdc voltage signal; increases from 0 to 10
Vdc as humidity increases. Output voltage is directly
proportional to relative humidity increase. See Fig. 3.
Maximum Power Consumption: 0.3 VA.
Mounting: Wall mount (directly to wall or standard outlet box).
Ambient Temperature Ranges:
Operating: 32°F to 125°F (0°C to 52°C).
Shipping: -40°F to +150°F (-40°C to +66°C).
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
63-2166—8
C7600B, H7655A SOLID STATE HUMIDITY SENSORS
SPECIFICATIONS (continued from page 1)
Humidity Range: 10 to 90 percent RH, noncondensing.
Humidity Accuracy:
From 30 to 70% RH: ±5 percent RH.
From 10 to 90% RH: ±7 percent RH.
1-13/16 (46)
3-1/4
(83)
4-5/8
(117)
3-13/16
(97)
10
9
8
7
6
5
4
VOLTAGE OUTPUT (VDC)
3
2
0
20
HUMIDITY IN PERCENT RH
40
NOMINAL
80
60
Fig. 2. C7600B nominal output voltage
vs. relative humidity.
% RH
100
Vdc
10
2.8
20
3.6
30
4.4
40
5.2
50
6.0
60
6.8
70
7.6
80
8.4
90
9.2
M8810A
7/8 (22)
1-1/16 (27)
3/8
(10)
2-7/8 (73)
3-5/8 (92)
M17720
Fig. 1. C7600B, H7665A dimensions in in. (mm).
10
9
8
7
6
5
4
VOLTAGE OUTPUT (VDC)
3
2
1
0
0
20
HUMIDITY IN PERCENT RH
40
NOMINAL
80
60
Fig. 3. H7655A nominal output voltage
vs. relative humidity.
100
% RH
0
10
20
30
40
50
60
70
80
90
100
Vdc
0
1
2
3
4
5
6
7
8
9
10
M22589
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
63-2166—8 2
C7600B, H7655A SOLID STATE HUMIDITY SENSORS
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check ratings given in instructions and on the product to
ensure the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Location
The sensor cay be installed directly on a wall or standard wall
outlet box.
The sensor should be located away from traffic areas, on an
inside wall, at least 3 ft (1m) from an outside wall and 54 in.
(1.4m) from the floor.
Mounting
1. Loosen the cover locking screw and remove the cover.
2. Run wire to the selected location; thread wire through
the semicircular hole in the wallplate; and make
connections to the sensor (see the Wiring section).
3. Four mounting screws are provided, two self-tapping
type for wall mounting and two for outlet box mounting.
Select the proper screws for the application.
4. If air drafts occur through the wall opening, eliminate
with suitable material.
5. Fasten the sensor on the wall or outlet box with screws
through the wallplate mounting holes. See Fig. 4.
6. Replace the cover and tighten the cover locking screw.
WALLPLATE
MOUNTING
SCREW (2)
MOUNTING
TAB
(2 INSIDE
COVER)
OUTLET BOX
Operation
C7600B
The sensor provides a 2 to 10 Vdc output signal directly
proportional to the humidity of the air where the unit is
mounted.
H7665A
The sensor provides a 0 to 10 Vdc output signal directly
proportional to the humidity of the air where the unit is
mounted.
WIRING
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
See Fig. 5 through 9 for wiring details. Wire input power
(16 to 40 Vdc or 16 to 30 Vac) to V+ and GND terminals.
Connect sensor output (OUT) and GND to a controller analog
input as shown in Fig. 5 through 9.
HUMIDITY
SENSOR
~V+
GND
OUT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 5. C7600B, H7655A typical wiring.
CONTROLLER
ANALOG
INPUT
SIG
GND
24 Vac
+
–
L1
L2
120 Vac
1
M2025E
THERMOSTAT
Fig. 4. Mounting the sensor on an outlet box.
MOUNTING
TAB SLOT (2)
COVER
LOCKING
SCREW
M17719
C7600B
-V+
OUT
GND
L1
120 Vac
24 Vac
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
L2
1
W7620 (W7600)
V1 (ANALOG INPUT)
COMM
M8809B
Fig. 6. C7600B wiring to W7620.
3 63-2166—8
C7600B, H7655A SOLID STATE HUMIDITY SENSORS
C7600B
-V+
OUT
GND
123
24 Vac
H775A HUMIDITY
1
L2
L1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
CONTROLLER
Fig. 7. C7600B wiring to H775A.
T7770 REMOTE SENSOR
T7350
SUBBASE
1
T5 T6 T7 T4
L2
2
L1
(HOT)
HS
Vo
(0-10 Vdc)
HUMIDITY SENSOR
456
Gnd Vin
24 Vac
5
123456789
T3
(Vac)
M5232B
OUTDOOR
AIR
SENSOR
OSOS ASAS
M
MHC HP
MOTION
SENSOR
H775B -E
HUMIDITY CONTROLLER
C7600B
-V+
OUT
GND
45 67
1
L1
L2
1
24 Vac
C7600C
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
+
-
123
Fig. 8. C7600B wiring to H775B-E in two-sensor system
with C7600C.
HEAT
RELAY 2
DISCHARGE
AIR
SENSOR
COMPRESSOR
CONTACTOR 4
W3/Y4 Y3 W2
RCX
AUXRH
3
4
ECONOMIZER
HEAT
RELAY 1
COMPRESSOR
CONTACTOR 2
W1 G
Y1
FAN
RELAY
COMPRESSOR
CONTACTOR 1
Y2
COMPRESSOR
CONTACTOR 3
24 Vac
8
M5231B
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
2
3
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
4
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
5
HC AND HP PROVIDE 24 VAC TO THE HUMIDITY SENSOR.
Fig. 9. Humidity Sensor (0-10 Vdc output) wiring with T7350
(use with RH/Temperature combination T7350 units only).
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
63-2166—8 B.B. Rev. 11-04 www.honeywell.com
M1V 4Z9
M22529
By using this Honeywell literature, you agree that Honeywell will have no liability
for any damages arising out of your use or modification to, the literature. You
will defend and indemnify Honeywell, its affiliates and subsidiaries, from and
against any liability, cost, or damages, including attorneys’ fees, arising out of,
or resulting from, any modification to the literature by you.
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