Armfield - Process Control Technology - Controller and trainer

The PCT19BR Programmable Logic Controller (PLC) enables multi-channel compatibility with selected equipment from the Armfield range. Accepts six analogue and eight digital input signals, and provides two analogue and eight digital outputs for use in a wide variety of control loops.

Key Features

• An industrial PLC (Allen Bradley SLCSOO) with RS485 and RS232 serial communications
• Front panel connections for two digital inputs, two digital outputs, two analogue inputs, two analogue outputs, two voltage sources and a voltmeter
• Rear panel connectors for six analogue inputs, two analogue outputs, eight digital inputs and eight digital outputs
• Ladder logic software is provided

The PCT20H PID controller connects to selected Armfield equipment, providing an analogue input/output, relay and alarm sockets for a digital output control action. An RS232 port enables serial communications with a user-provided PC.

Key Features

• An Industrial PID Controller (Honeywell UDC3300) with RS485 serial communications and incorporating adaptor to RS232
• Includes software for serial communication training and introduction to SCADA
• Front panel connections for two analogue inputs, one analogue output, one relay output and one alarm output

The PCT23MkII demonstrates a complete range of process control methods and strategies, including manual control, single feedback loops, cascade loops and distributed supervisory control of the process by a remote PC.

The system is a miniature replication of a true production process. The student is presented with real process control problems, with realistic dynamic behaviour and instabilities.

Key Features

• A bench-mounted process plant trainer with multiple streams both interacting and noninteracting. The process plant incorporates a miniature three-stage plate heat exchanger heated from a hot water circulator, two independent feed tanks, a holding tube with product-divert valve and two variable-speed peristaltic pumps
• Temperature, level, flow and conductivity control loops can be implemented
• Manual control, single feedback loops, through to sophisticated cascade loops and distributed supervisory control of the whole process by a remotely located computer can be demonstrated
• The effect of ‘dead time’ and heat recycle can be demonstrated
• An electrical console provides measurement and control of the process plant and enables a variety of control techniques including manual operation, on/off control, control from an external signal and control from a PC or PLC
• The equipment incorporates electrical fault simulation and control, data logging software, and a USB computer interface