Libratherm offers two zone and four zone temperature control panel for heater control in plastic injection moulding machines. The control panel comprises microcontroller based PID temperature controller, Auto/Manual selector switches, manual potentiometers and current meters on the front. Back side of the panel has provision for easy connection of sensors, heaters and power cable.Maximum Heaters of 4KW @ 230VAC can be connected per zone and the heater power is controlled through suitably rated Solid state relays, using PID controllers in the Auto mode and using potentiometer in the Manual mode. The Auto/Manual selection is through the toggle switch on the front panel.

The heart of the panel is Libratherm make PID controller – model PID-723, which accepts J, K or Pt-
100 sensors as the input and provides PID control output in the form of DC pulses to control outputs
to control the SSRs. The front panel current meter shows the heater status and the current flowing through each heater. The manual control operation is performed by using special PWM card accepting input from the potentiometer. Each heater is protected against short circuit using the individual MCB switches. Heaters are connected using standard 16A plug/sockets for easy connections and disconnections. AC supply to the panel is also connected through heavy duty plug and socket. Cooling fan is provided to exhaust the heat generated inside the panel.

The panel can be mounted on the bench close the injection moulding machine, it is user friendly to operate and easy to maintain.