Parr 4871 Process Controller 控制器

官方英文资料：The Parr Model 4871 Process Controller has been developed to provide an integrated stand alone control system for controlling either a single reactor with multiple feed and product controls or multiple reactors operating independently or in parallel. The 4871 is the ideal choice for all of Parr Instrument Company’s custom systems, including: tubular reactors, multiple reactor systems (both batch and cascade systems), continuous flow stirred reactors, and fluidized bed reactors.

官方英文资料：The Parr 4871 Process Controller combines the following components into a single control system:

官方英文资料：Flexible, Powerful Software:

官方英文资料：The control module of the Parr 4871 Process Controller is a Honeywell HC900 Hybrid Controller. This controller combines analog and logic control into a versatile, cost-effective controller designed specifically for process applications requiring analog measurement combined with programmable control actions.

官方英文资料：Controller Functions

官方英文资料：Analog Input (AI) Maximum Channels 480

官方英文资料：Analog Output (AO) Maximum Channels 200

官方英文资料：Digital I/O Maximum Channels 1920

官方英文资料：Control Loops Per Memory

官方英文资料：Ethernet Communications Yes

官方英文资料：Peer to Peer Communications Yes

官方英文资料：On-line Programming Yes

官方英文资料：Function Blocks 2000

官方英文资料：Sequential Functions Yes

官方英文资料：The controller is adapted to each user’s requirements by adding to the control chassis input and output modules. Each module provides for between four and sixteen individual inputs or outputs fully isolated from one another. These modules include:

官方英文资料：Input Modules: The analog inputs are of universal type and are most commonly used for thermocouple or RTD temperature sensors, strain gage type pressure transducers, and similar devices with mV, V, or resistance inputs. Input isolation, cold junction compensation, and burnout protection are incorporated into the circuitry. Each analog input module provides for eight separate inputs.

官方英文资料：The digital inputs can be logic inputs or contact closures. These are typically used for sensing valve positions or conditions of safety devices. Each digital input module provides for sixteen separate inputs.

官方英文资料：Output Modules: The analog outputs are 0-20 mA. A suitable dropping resistor can be used to convert this to 0-5 or 0-10 VDC. Analog outputs are commonly used to set stirrer motor operating speeds, position control valves, or drive mass flow controllers or pumps. Each analog output module is capable of controlling four separate devices or functions.