Limit Controllers | PID Control

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When Should You Use a Limit Controller? 

Limit controllers should be used for processes where there is a safety or quality requirement to protect a product or appliance from damage caused by excessive temperatures.

Typical Usage and Benefits

Limit devices are used in process control applications where independent limit switching for over or under temperature is required. If the pre-set temperature limit is exceeded then the output switches to shut down the system.

A limit controller is often used in conjunction with a loop controller. It will generally accept a variety of inputs such as thermocouple, RTD, or process inputs, then allowing for high or low temperature inputs to be set. Limit controllers are used in a variety of applications, particularly industrial ovens and furnaces applications as well as by the life science industry.

Limit Controllers from West Control Solutions

West Control Solutions has a selection of limit controllers from its leading product brands, CAL, Partlow, PMA and West. These are available in a range of sizes and offer different levels of output functionality.

Search limit controllers

Product

DIN Size

No. of Outputs Control Type Features Certs.

Limit Controller - 4700+ Limit Controller

West 4700+ Limit Controller

1/4th DIN 

96 x 96 x 110mm

    3

    High/low limit

    Alarm

    • 5A Latching Limit Relay
    • Easy to use HMI
    • Configuration via PC
    • Auto-hardware detect/set-up
    • Modbus communications
    • Jumperless configuration
    • Process alarms
    • CE
    • UL
    • cUR
    • UR
    • FM
    • CSA

    Limit Controller - 6700+ Limit Controller

    West 6700+ Limit Controller

    1/16th DIN
    48 x 48 x 110mm
      3

      High/low limit

      Alarm

      • 5A Latching Limit Relay
      • Easy to use HMI
      • Configuration via PC
      • Auto-hardware detect/set-up
      • Modbus communications
      • Jumperless configuration
      • Process alarms
      • CE
      • UL
      • cUR
      • UR
      • FM
      • CSA

      Limit Controller - 8700+ Limit Controller

      West 8700+ Limit Controller


      1/8th DIN
      96 x 48 x 110mm
        3

        High/low limit

        Alarm

        • 5A Latching Limit Relay
        • Easy to use HMI
        • Configuration via PC
        • Auto-hardware detect/set-up
        • Modbus communications
        • Jumperless configuration
        • Process alarms
        • CE
        • UL
        • cUR
        • UR
        • FM
        • CSA

        Limit Controller - TB 40-1 Limit Controller

        PMA TB 40-1 Limit Controller


        1/8th DIN
        96 x 48 x 118mm
        3 Limiter
        • Applicable for heating and cooling applications
        • For all types of thermocouples and resistance transducers
        • BluePort Front interface and BlueControl Software
        • Maintenance manager and error list
        • Alarm reset via RESET-key
        • Alarm reset via digital
        • IP65
        • CE
        • EN 14597
        • cULus

        Limit Controller - TB 45-1 Limit Controller

        PMA TB 45 Limit Controller


        DIN Rail Mounted
        99 x 22.5 x 118mm
        3 Limiter
        • Compact solution
        • Clips onto top-hat DIN rail
        • Plug-in screw terminals
        • Dual-line LC display
        • Convenient 3-key operation
        • Fast 100 ms response
        • IP65
        • CE
        • EN 14597
        • IP20
        • cULus

        STB 55

        STB 55 Limit Controller

        DIN Rail Mounted
        100 x 50 x 110mm


        1 Safety limiter
        • Certified to EN 61508 SIL2 and EN 14597
        • Input from Pt 100 in 3-wire connection, or dual thermocouples type J, K, N and S
        • Programmable temperature limit and switching hysteresis
        • Basic error <0,5 %, ±2 digits
        • Response time 0,5s
        • 1 SPDT relay for alarm output
        • Memory function for error signalling
        • Operator lock (password protection)

         

        • EN 61508 SIL 2
        • EN 14597
        • IP20
        • CE

         

        MAXVU Rail Limiter

        DIN Rail Mounted
        107 x 22.5x 123mm
          2 or 3

          High/low limit

           

          • DIN rail mounted
          • Universal input
          • Up to 3 outputs
          • Digital input
          • RS485 communications option
          • Fast configuration
          • Clear OLED display
          • 22.5mm module width

           

           

          • CE
          • UL
          • cUL
          • FM Approval

           

          CAL 3300 Temperature Controller

          CAL 3300 Temperature Controller

          1/32 DIN
          24 x 48 x 107mm
            2

            High limit

            • 1 x 4 digit LED display with 2 outputs LED
            • Easy-to-use autotuning
            • Simple menu-driven configuration
            • Single ramp/soak (dwell) program
            • IP66 protection
            • CALgrafix datalogging software

             

            • IP66
            • CE
            • UL
            • CSA
            • FM Approval

             

            CAL 9300 Temperature Controller

            CAL 9300 Temperature Controller


            1/16th DIN
            48 x 48 x 107mm
              2

              High limit

              • PID Control
              • Auto-Tune
              • Quick Start Wizard
              • Single Ramp/Soak (Dwell Programme)
              • On/Off Control
              • Derivative Approach Control (dAC)
              • Remote Configuration via CALgrafix
              • Datalogging Software
              • IP66
              • CE
              • UL
              • CSA
              • FM Approval

              CAL 9400 Temperature Controller

              CAL 9400 Temperature Controller


              1/16th DIN
              48 x 48 x 107mm
              2 High limit
              • PID Control
              • Auto-Tune
              • Quick Start Wizard
              • Single Ramp/Soak (Dwell Programme)
              • On/Off Control
              • Derivative Approach Control (dAC)
              • Remote Configuration via CALgrafix
              • Datalogging Software
              • IP66
              • CE
              • UL
              • CSA
              • FM Approval

              CAL 9500 Programmable Controller

              CAL 9500 Programmable Controller


              1/16th DIN
              48 x 48 x 107mm
              3 High limit
              • 2 x 4 Digital LED
              • Programmer Function
              • 31 Programs with up 126 Segments
              • PID Control
              • Auto-Tune
              • Quick Start Wizard
              • Remote Configuration via CALgrafix
              • Datalogging Software
              • IP66
              • CE
              • UL
              • CSA
              • FM Approval