1-800-663-4209 | Welcome to our new website, found an issue or bug? Please report it here
CN3251-Series
1/4 DIN Temperature and Process Ramp and Soak Controller
- Dual PID + Fuzzy Logic Control
- Up to Five Outputs– Control, Alarm or Event
- Universal Sensor Input
- Switching Power Supply 100 to240 Vac or Optional 12 to 24 Vac/Vdc
Product Overview
The CN3251 1/4 DIN temperature and process controller is a low cost, high performance single loop controller that can be used for temperature, flow, pressure and level control applications. With universal sensor inputs and front panel operator setup, one CN3251 controller can be easily field configured for a wide variety of applications, and simply reconfigured as application needs change. This makes it an exceptional choice for applications requiring multiple control needs, manufacturing facilities, testing facilities and testing applications.
![]()
Input Types and Ranges
![]()
Input Types and Ranges
| Input Type | Range | Accuracy @ 77°F/25°C ambient (all ±% of sensor span) |
| J Iron Constantan | -73 to 760°C -100 to 1400°F | 0.20% |
| K CHROMEGA™ ALOMEGA™ | -184 to 1316°C -300 to 2400°F | 0.20% |
| T Copper Constantan | -212 to 399°C -350 to 750°F | 0.4% for PV <-80°C 0.2% for PV >-80°C |
| E CHROMEGA™ Constantan | -73 to 593°C -100 to 1100°F | 0.20% |
| R Pt-13%Rh/Pt | -18 to 1760°C 0 to 3200°F | 0.40% |
| S Pt-10%Rh/Pt | -18 to 1760°C 0 to 3200°F | 0.40% |
| B Pt-30%Rh/Pt-6%Rh | 10 to 1816°C 50 to 3300°F | 0.4% for PV >538°C |
| RTD Pt, 385 100 ohm | -128 to 538°C -200 to 1000°F -73.3 to 482.2°C -99.9 to 899.9°F | 0.20% |
| 4 to 20 mA | Scalable (-500 to 5000) | 0.20% |
| 0 to 5 Vdc | Scalable (-500 to 5000) | 0.20% |
| 1 to 5 Vdc | Scalable (-500 to 5000) | 0.20% |