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1/4 DIN Limit Temperature/Process Controllers with Modular Communications Options


Limit Process Controller | CN3101

Limit Process Controller

  • 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
Temperature and Process Controllers and Power Switching Devices - View related products


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.

For Special Options Consult Sales or Temperature Engineering for Availability and Pricing.
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What Other People Bought: When you see this icon, click on it to expand a list of products that other people have bought when they purchased this model.


Most Popular Models!

Part Number/Desc.
CN3101-PV-S4 Star
Availability: 12 weeks
Hi/Low limit controller with single ouput mechanical relay and one alarm, retransmission, RS422/485
CN3101 Star
Availability: 2 weeks
Hi/Low limit controller with single ouput mechanical relay and one alarm
CN3101-S2 Star
Availability: 12 weeks
Hi/Low limit controller with single ouput mechanical relay, one alarm with RS-232 communications*
3250X-S2 Star
Availability: 6 weeks
RS-232 digital communications board*
3250X-S4 Star
Availability: 6 weeks
RS-485/422 digital communications board*
CN3200-SOFT-WIN2 Star
Availability: 6 weeks
Software for communications options
3250X-CASE-COMM Star
Availability: 6 weeks
Housing for CN3101 and CN3251's with digital communications**
3250X-CASE Star
Availability: 6 weeks
Housing for CN3101 and CN3251's without digital communications
3250X-SBKT Star
Availability: 2 weeks
Side mounting bracket for CN3101 and CN3251 models
Click to expand/minimize a list of what others bought with theCNQUENCHARC
Availability: 2 weeks
Noise Suppression RC snubber (2 leads), 110 to 230 Vac
All amounts shown in USD
Note: Specify input code TC, RTD, mV, V or mA. For complete product specifications, including range table for the various inputs choices download the detailed PDF data sheet in the section below.
*Only one communications option can be purchased per unit.
**In order to add communications to a CN3101, the housing must be replaced with the 3250X-CASE-COMM so that either the 3250X-S2 or 3250X-S4 communications board can be installed.
Ordering Example: (1) CN3101-PV single output limit controller, 1/4 DIN bezel, programmable input, one alarm, and recorder output, $410 + 80, USD725.00