Limit Controllers | Temperature Control

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.

Limit device EN Brochure thumb

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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.

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Single Loop Controllers

Multi Loop Controllers

Programmers

Limit Controllers

Thyristors

Product

DIN Size

No. of Outputs Control Type Features Certs.
STB 50 Thumbnail

STB 50 Limit Controller

1/8 DIN
96 x 48 x 198mm

3 Safety limiter
  • Graphic-LCD-display, with white LCD-backlight
  • Inputs RTD Pt100 or double-thermocouple
  • 2 alarm outputs 
  • Useable as Limiter and Exhaust gas Limiter
  • Safety Limit alarm plus separate warning 
  • DIN EN 14597 SIL2

STB55 Thumbnail

STB 55 Limit Controller

DIN Rail Mounted
100 x 50 x 110mm

1 Safety limiter
  • Graphic-LCD-display, with white LCD-backlight
  • Inputs RTD Pt100 or double-thermocouple
  • 2 alarm outputs 
  • Useable as Limiter and Exhaust gas Limiter
  • Safety Limit alarm plus separate warning
        •  
        • SIL2
        • EN 14597

         

        4700+ Limit Controller

        West 4700+

        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

          6700+ Limit Controller

          West 6700+

          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

            8700+ Limit Controller

            West 8700+


            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

              TB 40-1 Limit Controller

              PMA TB 40-1


              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

              TB 45-1 Limit Controller

              PMA TB 45


              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

              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