Limit Controllers | PID Control

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Limit Controllers

Limits and monitors provide control and safety override capabilities to protect personnel, products and machinery against high or low temperatures. These devices are used in process control applications where independent limit switching for over or under temperature is required. They allow users to define upper or lower limits by entering setpoint values. If the pre-set temperature limit is exceeded, the output switches to ensure that the system is in a safe state. For example, the limit or monitor device can shut the system down or trigger forced cooling. Applications that often require limit and monitoring devices are ovens, furnaces, combustion plant, steam systems and food heating equipment, to name a few.

Thermal process applications require monitors and limiters to be type tested to appropriate standards, such as EN14597-1, FM3454 and SIL2. Generally, limits and monitors accept a variety of inputs such as thermocouple, RTD, or process inputs, allowing for high or low temperature inputs to be set. West Control Solutions offers a comprehensive range of devices, from simple, cost-effective units to high-end solutions.

Find out more - Download the product guide

Several factors should be considered in selecting the correct device: limit device and machinery standards, risk assessment or legislation defining the safety integrity level and the mounting style needed for a machine. Download here to find out more. Limit device EN Brochure

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

         

        STB 50 Limit Controller

        STB 50 Limit Controller

        1/8 DIN
        96 x 48 x 198mm 

        3 Safety limiter
        • 1/8 DIN (96 x 48 mm), 198 mm depth
        • Graphic-LCD-display, with white LCD-backlight
        • Inputs RTD Pt100 or double-thermocouple
        • 2 alarm outputs and retransmission output
        • Useable as Limiter and Exhaust gas Limiter
        • Safety Limit alarm plus separate warning 
        • Memory function for error message
        • Certified according to DIN EN 14597 SIL2
        • DIN EN 14597 SIL2

        MAXVU Rail Limiter

        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