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Text version of the page
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4871 Process Controller
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Sélection Guide
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Each 4871 Controller will be specified and assembled to match the users intended application. These applications can vary from a single reactor with full process control to eight reactors operating in parallel. The 4871 Process Controller connects to a
customer-supplied PC with a current Windows Operating System.
There are three basic parts to this configuration process.
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1. Basic Controller
The base model includes all of the components that will be required for
any system:
• Control chassis with CPU
• Communication module to PC
• Power supply
• Connection cable to PC
• Operating and configuration software
• Ethernet connection
• Specview Scada Software
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Available Models:
4871A Process Controller for up to 4 I/O Modules 4871B Process Controller for up to 8 I/O Modules 4871C Process Controller for up to 12 I/O Modules
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2. Input and Output Modules
These are the analog and digital inputs and outputs required to receive the signals from the sensors (thermocouples, pressure transducers, position switches, safety interlocks, etc.) installed on the system and to drive the control devices (motors, heaters, control valves, coolant flow, etc) which operate the system.
•Analog Input (AI) 8 / module
• Digital Input (DI) 16 / module
• Analog Output (AO) 4 / module
• Digital Output (DO) 16 / module
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3. Power Controller
The load carrying components are mounted separately from the data processing components mounted in the controller cabinet. Typically the components mounted
in a power controller would include:
• A Solid state load relay for heater control
• A Solid state load relay for cooling control
• Motor speed controller
• Fuses and circuit breakers for above
A Model 4875 Power Controller includes a complement of heating, cooling and motor control to operate a single reactor. Each reactor being controlled by the Model 4871 Controller will require its own power controller. Power controllers can be custom designed to meet unique requirements with additional control features or more
limited systems.
Please contact the customer service department for assistance in configuring the Series 4871 Process Controllers.
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Parr Instrument Company
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Printed in USA
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211 53rd Street
Moline, Illinois 61265 USA
Phone: 1-309-762-7716 or 1-800-872-7720
Fax: 1-309-762-9453
E-mail: parr@parrinst.com
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Bulletin 4871 3500 0207
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