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1/16 DIN Limit Controller

Item# CN6221-R

1/16 DIN Limit Controller CN6221-R CN6221-R
  • Dual Display
  • Universal Input
  • High or Low Limit
  • Digital Input for Remote Reset
  • RS485 Communications (Optional)
  • Alarms (Optional)
  • Retransmission Output (Optional)
  • FM Approved
  • UL and CSA Approved


CN6221 Series are in the end of life cycle. As a possible substitute & upgrade, please check out Newest Released 16 DIN Dual Display PID Controller CND3 Series for more advanced features with better price.

The CN6221 Series is an FM approved limit controller that can be configured either as a high limit or as a low limit controller. The CN6221 features universal input, Optional 2 alarm outputs, Optional retransmission output, a timer to count the total time the setpoint is exceeded, and a register to retain the maximum. The RS485 communication interface is available as an option.

Input TypeRange (°C)Range (°F)
ThermocoupleK-270 to 1370-300 to 2500
0 to 60032 to 999.9
0 to 40032 to 750
-199.9 to 200-300 to 400
J-199.9 to 999.9-300 to 2100
T-199.9 to 400-300 to 750
E-199.9 to 999.9-300 to 1800
R0 to 170032 to 3100
S0 to 170032 to 3100
B0 to 180032 to 3200
N-200 to 1300-300 to 2400
L-199.9 to 900-300 to 1600
U-199.9 to 400-300 to 750
Platinel 20 to 139032 to 2500
RTDPt100-199.9 to 850-199.9 to 999.9
0 to 40032 to 750
-199.9 to 200-300 to 400
-19.9 to 99.9-199.9 to 999.9
JPt100-199.9 to 500
DC Voltage0 to 100 mV0 to 100
0 to 5 V0 to 5
1 to 5 V1 to 5
0 to 10 V0 to 10

SPECIFICATIONS 
Power Supply 
Voltage: 100 to 240 Vac (±10%), 
Frequency: 50 or 60 Hz 
Maximum Power Consumption: 8 Va max (4 W max) 
Memory: Non-volatile memory 
Withstanding Voltage (Between Primary and Secondary Terminals): 1500 Vac for 1 min (see Note1) 
Insulation Resistance (Between Primary and Secondary Terminals): 20 MΩ or more at 500 Vdc (see Note 1) 
Note 1: The primary terminals are the power supply terminals and relay output terminals. The secondary terminals are the analog input and output terminals, the voltage pulse output terminals, and the contact input terminals. 

Contact Input 
Function: Resetting "exceeded status" 
Input: 1 point 
Type: Non-voltage contact or transistor contact 
Contact Capacity: At least 12 V/10 mA 
On/Off Judgment: On state for 1 kΩ or less; off state for 20 kΩ or greater 

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