PID Temperature Controller - Value Range - 48Wx48Hx61D

The NEX301 (48x48) PID Temperature Controller from Radix  is a cost effective & economical model in the Value Range. It has an easy-to-read, large, customized display and compact size. This PID temperature controller is used in applications such as food processing machines, plastic extruders and moulding machines, packaging machines, ovens and small furnaces. Its precise temperature control provides a reliable solution at an affordable price.

NEX301 accepts five types of thermocouples -  J, K, R, S, T - and Pt100 RTD inputs. All these inputs are user settable through keys (not factory selected). No DIP switch is used. Thus, if a user needs to change the input type from thermocouple J to Pt100 RTD, he can easily do so through the keys. This feature allows dealers as well as end-users to use one product instead of multiple instruments for different inputs. NEX301 has a high input accuracy : Thermocouple : ± 0.25% of span ±1 °C, RTD Pt100 : ± 0.05% of span ±1 °C, and maintains high accuracy throughout the operating temperature of -10 to 50 °C. Sampling time is 200 ms . The ‘Digital Filter’ parameter removes the fluctuation when the inputs have electrical noise. Many parameters such as Input Bias and Input Limits allow the instrument to adapt to any application. Sensor break detection is automatic and the relay can be selected to be on or off during sensor break.

NEX301 has a dual-row, four-digit customized display. The upper row is a large,16.3mm (0.64”), bright red display, and the lower row is a 9mm (0.35”), bright green LED display. This makes it easily viewable from far. The dual display shows both the process value and the control setpoint in the run mode. The dual display also makes it easier to configure parameters. 

NEX301 is an easy-to-use product with four user friendly keys. The programming and setting of parameters can be easily done by any layman or technician. The programming levels and parameters are designed such that any parameter can be found easily. The setpoints can be quickly and easily set without going into program mode.

NEX301 is a PID temperature controller with an advanced PID and fuzzy logic algorithm. It has two setpoints, one for PID/On-Off Control and another for On-Off Control/Alarm. All the PID parameters can be set by the user or can be autotuned. Autotuning is preferred for precise control. The procedure for autotuning is simple, fast and gives good accuracy. The controller can be easily converted from PID action to On-Off action by setting a single parameter. When On-Off action is selected, all parameters related to PID action such as band, integral time, etc. are hidden to make it easy for the user. Similarly, NEX301 can be easily set for only time proportional mode.

Thus, NEX301 can be used as a PID Temperature controller with one relay for PID control and another for On-Off control; or ON-OFF controller with two relay outputs; or PID controller with alarm; or On-off controller with alarm. All these configurations can be easily set by the user. Alarm modes include high, low, deviation and band alarms. Latch mode for alarm is provided and one can reset the alarm through the Acknowledge key.

NEX301 has relay and SSR outputs available for the first relay. This minimises the varieties of order codes for dealers as well as end-users. The end-user can select either output by just setting a parameter and wiring at the proper terminals. Second relay option is also available, thus providing a maximum of (2 Relay + 1 SSR) outputs in a compact  size.

NEX301 is compact with a depth of only 60mm behind panel. This makes it useful in tight spaces with limited depth.

Also available in the Value Range of PID Temperature Controllers from Radix is  NEX305  (similar to NEX301, but of size 96Wx96Hx35D mm).