Motion Control & Drives


High density modular control system

November 2013 Motion Control & Drives

RKC Instruments has introduced the new SRZ DIN rail mounted high-density modular system with a sample cycle time of 250 ms. Control method is selectable between position proportional control and cascade control in addition to the typical heat only and heat/cool methods. The enhanced tuning PID II achieves a quick response to set-point and with greater protection from overshoot/undershoot cause by external disturbances.

Universal inputs include 10 thermocouples types, RTD and voltage or current. A single module may provide up to four channels of Heat only or two Heat/Cool with up to 16 modules connectable in cascade. Numerous alarms choices include loop break alarm, heater break alarm and alarm interlock. CT modules and DIO modules may be used to provide expanded options. Additional functions include auto and start-up tuning, eight memory areas which can be used for ramp/soak applications, peak current limit, output distribution function, feed forward, differential set-point and an auto temperature rise learning function so all channels reach set-point at the same time, eliminating partial burns or thermal swelling.

The SRZ is designed for mounting on the inside of an instrument panel to save space and to replace banks of discrete temperature controllers. Addition or removal of individual modules can be easily done without cycling power to the unit. It is an excellent solution for adding multi-zone PID temperature control to new equipment or retrofit existing control panels. This controller may also be connected to a PC, touch screen or PLC and linked together to operate as one system. It may also be connected to a third-party machine interface already in operation on the machine.

The flexibility of the SRZ series makes it an ideal instrument for both end-users and the OEM market in a wide range of industries including extrusion, semiconductor, test stands, environmental chambers, plastics, packaging, and heat-related processes.



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