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Product Name: R851B/V Line Voltage Step/Vernier Controller
Product Description
The R851B/V series line voltage ( up to 240 V a.c.) electronic step controller is designed for cost-effective and precise control of multi-stage applications typically found in electric duct heaters and boilers. Available in four or eight stage models, the R851V can also be used in conjunction with the R810 power switch or R820 SCR power controller, which will result in a fully proportional control of the load. The R851B is specifically designed for electric boiler sequencing.
The R850 can also be used on any type of staging applications found in refrigeration or automation applications.
Features:
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Microcomputer-based
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Adjustable
inter-stage time delay
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Test-button
to bypass time delay
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Choice of
last-in first out (LIFO) or first in, first out (FIFO) configuration
for even wear
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8 stage
model can be slaved to another 8 or 4 stage R850 for 12 or 16 stages
maximum
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Accepts
industry standard signals: 0-10 V d.c., 4-20 ma d.c., 0-135 ohm
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Models
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Model
No.
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Description
/ Application
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Technical
Bulletin
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R851V-4
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4 stage step
controller
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R851V-8
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8 stage step
controller
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R851B-4
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4 stage,
boiler
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R851B-8
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8 stage,
boiler
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Company Details
Viconics Electronics Inc. was founded in 1981 in Montreal, Canada as Quantum Electronics to respond to the increasing demand for accurate, versatile, cost-effective and reliable industrial process and temperature instruments and controls.
... more
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| Related Products: |
C1000 Series Microcomputer-based Zoning Thermostats for Oem Use, CBE117/118 Advanced Heat Pump Thermostat, H100 Humidity Transmitter, H200 Electronic Humidistats/Dehumidistat, H263 Diagnostic Tool for H200/270 series, H270 Advanced Humidistat/Dehumidistat, Hp727/S Swimming Pool Heat Pump Controller, R805 Solid State Relay Electric Heat Control, R810 Solid State Relays with Heat Sink Electric Heat Control, R811 Solid State Relays with Heat Sink and Mounting Cover Electric Heat Control, R820 SCR Power Controller, R842 Electronic Relay for Electric Baseboard Heater, R850 Low Voltage Step/Vernier Controller, S1010E1000 Capsule Type Sensor, S2000D1000 Duct Mounted Sensor, S2020E1000 Outdoor Temperature Sensor, S2060A1000 Duct Mounted Averging Sensors, S3000 Room Temperature Sensor, S3000 Room Temperature Sensor for HVAC Building Automation, S3010W1000 Room Sensor, S3020W1000 Room Sensor with Override Button, S80 Room Sensor, T021-M018 Proportional Mixed Air Controlle, T7600 BACnet communicating thermostat, T7600 LonTalk communicating thermostat |
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