Specifications - Honeywell R7426B Product Data

R7426A,B,C TEMPERATURE CONTROLLER

SPECIFICATIONS

Models:
R7426: Temperature controller with integrated real time clock
(RTC), On/Off output, and other model-specific features.
R7426A: Includes one three-position floating output. Choice of
selectable output signals to drive solid-state or step relays.
R7426B: Three three-position floating outputs. Choice of
selectable output signals to drive solid-state or step relays.
R7426C: For sequence control of heating, energy recovery or
mixed-air damper, and cooling.
Three analog 0/2 to 10 Vdc outputs.
Dimensions: See Fig. 1.
Weight: 0.55 lb (250g).
Mounting: Back panel, wall, DIN rail, or (with panel mounting
accessory frame) front panel.
Electronic:
Microcontroller: 8-bit, 10-bit A/D converter, EEPROM and LCD.
Power Supply: 24 Vac +10, -15%, 50/60Hz.
Power Consumption: 3 VA.
Battery: Lithium/Manganese Dioxide; 3 Vdc, 170 mAh
(approximate life: 8 years).
Wiring:
Maximum Wiring Run from Controller to All Devices:
18 AWG: 328 ft (100m).
16 AWG: 492 ft (150m).
Offset Due to Wire Resistance: See Table 1.
Ambient Ratings:
Temperature:
Operating: 32°F to 122°F (0°C to 50°C).
Storage: -31°F to +158°F (-35°C to +70°C).
Humidity: 5 to 95% relative humidity, non-condensing.
Control Point Adjustment (CPA)/Setpoint Adjustment
(SPA) Input: See Accessories and Table 2.
Control ranges:
32°F to 130°F.
32°F to 260°F.
Input (Temperature Sensors):
I01: Main.
I02: Limit or cascade.
I03: Compensation.
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 Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 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.
63-2564—1
Accuracy: ±0.9°F (±0.5K) (not including sensor inaccuracy).
Digital inputs:
Occupancy (Summer/Winter Changeover):
Operation Mode: unoccupied (winter), occupied (summer).
Potential Free Contact:
open > 40K ohms, closed < 100 ohms.
Freeze Protection:
Operation Mode: freeze protection (normal contact closed).
Potential Free Contact:
open > 40K ohms, closed < 100 ohms.
Output:
Maximum Load:
R7426A,B: 450 mA at 24 Vac.
R7426C (Analog 0/2 to 10 Vdc Outputs): 1.2 mA at 12 Vdc.
On/Off: 24 Vac On/Off single-pole, single-throw (spst) digital
output to switch pump or fan.
TRIAC (selectable):
Floating: Single-pole, double-throw (spdt) switching.
Multi-Stage: On (24 Vac) / Off (0 Vac).
Pulse Width Modulation: 6 to 180 sec pulse width (for
European electric current valves).
Sensor Ratings:
Temperature Range:
Pt 1000: -22°F to 266°F (-30°C to +130°C).
NTC 20K ohms: -22°F to 266°F (-30°C to +130°C).
Characteristics:
Pt 1000: 1000 ohms at 32°F (0°C).
NTC 20K ohms: 20K ohms at 77°F (25°C).
Approvals:
Protection class II.
NEMA 1, IP30 or (with front panel mounting only) IP40.
FCC Part 15, Class B.
Meets CE requirements.
Accessories:
43193862-001 Front panel mounting frame.
NTC 20K ohm sensors:
C7031B1033: For duct discharge air, hot water.
C7031D1062: For hot or chilled water.
C7031F1018: For outdoor air temperature.
C7031J1050: For duct discharge air (averaging).
C7031K1017: For hot or chilled water (strap-on).
T7770A1006: Wall module with locking cover.
T7770B1004: Wall module with locking cover and setpoint
adjustment knob (55°F to 85°F) for CPATYP 3.
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