1/4 DIN Limit Temperature Controllers from OMEGA Engineering

The CN3101 is a compact, fully programmable high or low limit controller. It is UL listed and has FM approval as a limit controller. With user programmable inputs, outputs and high/low limit features, it is adaptable to almost any limit control application, and can easily be reconfigured as needed. Sophisticated limit control features include a total time over/under setpoint display and peak (maximum or minimum) process variable display. These valuable CN3101 features allow you to determine if process damage has occurred, and they can help in analyzing the cause if shutdown occurs.


  • One high/low limit 5 amp relay output
  • One independent 5 amp alarm relay, standard
  • Universal sensor inputs
  • Panel or remote controlled setpoint
  • 24 Vdc transmitter power supply
  • NEMA-4X hosedown front panel
  • Power Supply: 100 to 240 Vac, standard
  • FM approved
  • UL listed (C), (US)


  • RS-232 or RS-422/RS-485 digital communications with second 5 amp alarm relay
  • Analog output