Single-loop Thyristor Temperature Controller Reduces Wiring and Cabinet Size
- Published: Wednesday, 16 January 2013 14:20
The REVO TC from CD Automation combines a temperature controller, solid state relay (SSR) thyristor, quick blow fuse protection and current monitoring – all in a compact single-loop package.
CD Automation’s REVO TC thyristor power controller provides an integrated control zone and boasts a space reduction of 50%, labour reduction of two hours per control zone, single-loop integrity and high reliability. The wiring and labour savings are the result of not connecting 11 wires per zone with each wire typically taking 11 minutes. Multiple loops can be provided as an option for use in larger, multi-loop systems.
There is also less risk associated with schematic reading and understanding, distance and path measuring, and wire cutting, strapping, labelling on two terminations, crimping, terminals block wiring and panel drilling.
If one zone fails, a non-technical user can repair it within minutes. The 40A solid state relay and current transformer is designed without compromise, with heatsink and thyristor junctions generously sized to guarantee long thyristor life.
“The temperature control features in the product mean that it works at low junction thyristor temperature with 20% margin on maximum temperature,” claims Jez Watson of CD Automation. “REVO TC is a combined SSR and temperature controller with four outputs and with proportional integral derivative (PID) closed loop control affording single-loop Integrity.”
Because its REVO range is designed for field-bus systems, CD Automation also offers a range of Monitouch touch panels from 5” to 15″ that can be used as a gateway between different bus systems. For example, Modbus, Profibus DP, CanOPEN, Modbus and TCP/Ethernet can all be used. Certain models also support memory cards and feature a USB port for external memory or a printer.
The REVO TC up to 40A is normally used for plastics machinery, while the REVO TC over 60A in one, two and three phase versions is normally used in furnaces. Featuring a PID temperature controller with pre-tune, self-tune and manual tune, it provides RS485 communication from 19200-57600 baud on the Modbus RTU protocol. The operator has a dual display to read PV (Process Value), set point and load current.
REVO TC is endowed with a universal input for thermocouple, resistance temperature detector (RTD) and linear signal, and has four configurable outputs: relay, SSR, 4:20mA and 0:10V. Cooling output allows for selection between water, oil or ventilation.