C7772A, F, G
Wallplate Temperature Sensor
PRODUCT DATA
FEATURES
•
Low profile when mounted on industry standard utility
conduit box.
•
•
Rugged, brushed stainless steel wallplate.
Integral foam pad isolates wallplate sensor from conduit
box.
•
•
Insulated screw terminals ensure reliable field wiring
connection.
Models available with a variety of resistive temperature
sensor elements.
APPLICATION
The C7772A series of Wallplate Temperature Sensors are
designed to be used with the Excel 5000 family and other
Honeywell controllers. The C7772F Series is designed to be
used with the TB7600, TB7300, and TB7200 Series
communicating thermostats and other controllers that require
a 10K ohm NTC Type II sensor. The C7772G is designed to
be used with WEBs-AX I/O modules and other controllers that
require a 10K ohm NTC Type III sensor. The C7772 sensors
provide a resistive output signal proportional to sensed room
or space temperature. The C7772 is well suited for low-profile
wall-mounted applications where durability and tamper-proof
construction is desired, such as schools, prisons and
institutions.
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C7772A, F, G WALLPLATE TEMPERATURE SENSOR
Table 1. C7772 Models.
Resistance-Temperature
Curve Type
Lead Wire
Color
Model
C7772A
C7772F
C7772G
Sensor Type
20K NTC Thermistor
Nominal Resistance
20,000 ohms at 77°F (25°C)
Non-linear Negative TCR
Green/Blue
Green/White
White/White
10K Ohm NTC Type II Thermistor
10K Ohm NTC Type III Thermistor
10,000 ohms @ 77°F (25°C) Non-linear Negative TCR
10,000 ohms @ 77°F (25°C) Non-linear Negative TCR
NOTE: TCR = temperature coefficient of resistance.
Mounting
To mount on conduit box (see Fig. 2):
1.
Do not route temperature sensor wiring with
1. Remove the appropriate knockout on the standard utility
conduit box for the application.
2. Make wiring connections to the system components.
building power wiring, next to control contactors,
near light dimming circuits, electric motors or
welding equipment.
2.
3.
Avoid poor wiring connections.
Do not mount sensor in an incorrect environment.
IMPORTANT
Level only for appearance. The sensor functions
normally even when not level.
Connect the low voltage wiring from the controller terminals to
the sensor screw terminals and tighten. See Fig. 2.
3. Use the No. 6 screws provided to mount the wallplate to
the conduit box.
STANDARD UTILITY
CONDUIT BOX
Wiring
BLANK
FACEPLATE
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
CONNECTOR
LOCKNUT
AND
CONDUIT
Disconnect all power supplies before installation.
CAUTION
Failure to follow proper wiring practices can introduce
disruptive electrical interference (noise).
Keep wiring at least one foot away from large inductive
loads such as motors, line starters, lighting ballasts,
and large power distribution panels.
Erratic System Operation Hazard.
TO APPROPRIATE
SYSTEM
COMPONENTS
M16296
Shielded cable is required in installations where these
guidelines cannot be met.
Ground shield only to grounded controller case.
Fig. 2. Mounting, wiring for C7772.
IMPORTANT
•
Temperature sensor wiring can be sized from
16 to 20 AWG depending on the application.
The maximum length of wire from a device to the
wallplate sensor is 300 ft (91m).
OPERATION
The C7772 Wallplate Temperature Sensor provides a resistive
output signal proportional to the sensed room temperature.
•
NOTE: Erratic temperature readings from a sensor can be
caused by the wiring practices described below.
These must be avoided to assure proper operation:
3
68-0213—04
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C7772A, F, G WALLPLATE TEMPERATURE SENSOR
Table 2. Typical Resistance of Sensor Models.
CHECKOUT
Typical Resistance (in ohms)
The C7772 Wallplate Temperature Sensor is immediately
operational after wiring connections are made. Use an
accurate thermometer of ±1°F (0.5°C) to measure the
temperature at the sensor location. To verify sensor accuracy,
use an ohmmeter to measure the resistance across the
sensor wires and use Table 2 to check the accuracy of the
specific model.
C7772A
54,200
C7772F
25,392
C7772G
23,467
At 41°F (5°C)
At 50°F (10°C) 41,758
At 59°F (15°C) 32,427
At 68°F (20°C) 25,370
At 77°F (25°C) 20,000
At 86°F (30°C) 15,856
At 95°F (35°C) 12,654
19,901
15,712
12,493
10,000
8,057
18,789
15,137
12,268
10,000
8,196
6,531
6,754
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
® U.S. Registered Trademark
© 2012 Honeywell International Inc.
68-0213—04 L.L. Rev. 01-2012
Printed in United States
Golden Valley, MN 55422
customer.honeywell.com
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