C21

50 x 26 mm Low cost controller

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The Fuzzy Logic plus PID microprocessor-based temperature controller, incorporate one bright, easy to read 4-digit LED display, indicating process value and set point value. The Fuzzy Logic technology enables a process to reach a predetermined set point in the shortest time, with the minimum of overshoot during power-up or external load disturbance.
As a professional and experienced manufacturer, we supply high-performance and quality temperature controllers, which are also called temperature control, electronic temperature control, electronic temperature controller, and PID controller.

Features

  • Easy-to-use
  • Fuzzy modified PID heat & cool control
  • Fast A-D sampling rate (5 times/s)
  • Universal input (PT100, thermocouple)with high accuracy 18-bit A-D
  • Analog output (linear current or voltage)uses high accuracy 15-bit D-A
  • RS-485 RS-232 interface
  • Programming port provided on board
  • Support manual control & auto-tune function
  • Wide variety of alarm mode selection
  • Lockout protection control
  • Bumpless transfer during failure mode
  • Soft-start ramp and dwell timer
  • Bright display stabilized with digital filter
  • Front panel sealed to NEMA 4X & IP65(model C21)
  • UL/CSA/CE approval
  • High performance with low cost

 
Specification
Power 
90 - 250 VAC, 47 - 63 Hz, 10VA, 5W maximum
11 - 26 VAC / VDC, SELV, Limited Energy, 10VA, 5W maximum

Input 1 Characteristics 
Resolution 18 bits
Sampling Rate 5 times / second
Maximum Rating -2 VDC minimum, 12 VDC maximum( 1 minute for mA input )
Temperature Effect ±1.5 uV/ °C for all inputs except mA
input ±3.0 uV/ °C for mA input
Sensor Lead Resistance Effect T/C: 0.2uV/ohm
3-wire RTD: 2.6 °C/ohm of resistance difference of two leads
2-wire RTD: 2.6 °C/ohm of resistance sum of two leads
Burn-out Current 200nA
Common Mode Rejection Ratio ( CMRR ) 120dB
Normal Mode Rejection Ratio ( NMRR ) 55dB
Sensor Break Detection Sensor open for TC, RTD and mV inputs,
Sensor short for RTD input,
below 1 mA for 4-20 mA input,
below 0.25V for 1 - 5 V input, unavailable for other inputs.
Sensor Break Responding Time  Within 4 seconds for TC, RTD and mV inputs,
0.1 second for 4-20 mA and 1 - 5 V inputs.

Input 1
Type Range  Accuracy@ 25 °C Input Impedance
J -120 ~ 1000 °C (-184 ~ 1832 °F) ±2 °C 2.2MΩ
K -200 ~ 1370 °C (-328 ~ 2498°F) ±2 °C 2.2MΩ
T -250 ~ 400°C (-418 ~ 752°F) ±2 °C 2.2MΩ
E -100 ~ 900 °C (-148 ~ 1652 °F) ±2 °C 2.2MΩ
B 0 ~ 1800 °C (32 ~ 3372 °F) ±2 °C (200°C - 1800°C) 2.2MΩ
R 0 ~ 1767.8 °C (32 ~ 3214 °F) ±2 °C 2.2MΩ
S 0 ~ 1767.8 °C (32 ~ 3214 °F) ±2 °C 2.2MΩ
N -250 ~ 1300 °C (-418 ~ 2372 °F) ±2 °C 2.2MΩ
L -200 ~ 900 °C (-328 ~ 1652 °F) ±2 °C 2.2MΩ
PT100 (DIN) -210 ~ 700 °C (-346 ~ 1292 °F) ±0.4°C 1.3KΩ
PT100 (JIS) -200 ~ 600 °C (-328 ~ 1112 °F) ±0.4°C 1.3KΩ
mV -8 ~ 70mV ±0.05% 2.2MΩ
mA -3 ~ 27mA ±0.05% 70.5Ω
V -1.3 ~ 11.5V ±0.05% 650KΩ

Output 1 / Output 2 Linear Output Characteristics
Relay Rating 2A/240 VAC, life cycles 200,000 for resistive load
Pulsed Voltage Source Voltage 5V, current limiting resistance 66Ω .

Linear Output Characteristics
Type Zero Tolerance Span Tolerance Load Capacity
4-20 mA 3.6-4 mA 20-21 mA 500Ω max.
0-20 mA 0 mA 20-21 mA 500Ω max.
0-5 V 0 V 5-5.25 V 10KΩ min.
1-5 V 0.9-1 V 5-5.25 V 10KΩ min.
0-10 V 0 V 10-10.5 V 10KΩ min.

Linear Output  
Resolution 15 bits
Output Regulation 0.02 % for full load change
Output Settling Time 0.1 sec. ( stable to 99.9 % )
Isolation Breakdown Voltage  1000VAC
Temperature Effect ±0.01 % of SPAN / °C

Triac ( SSR ) Output  
Rating 1A / 240 VAC
Inrush Current 20A for 1 cycle
Min. Load Current 50 mA rms
Max. Off-state Leakage 3 mA rms
Max. On-state Voltage 1.5V rms
Insulation Resistance 1000 Mohms min. at 500 VDC
Dielectric Strength 2500 VAC for 1 minute

Alarm( Output 2 )
Alarm 1 Relay Form A,Max. rating 2A/240VAC, life cycles 200,000 for resistive load.
Alarm Functions Dwell timer,
Deviation High / Low Alarm,
Deviation Band High / Low Alarm
Process High / Low Alarm
Alarm Mode Normal, Latching, Hold, Latching / Hold.
Dwell Timer  0.1 - 4553.6 minutes

Data Communication  
Interface RS-232 ( 1 unit ), RS-485 ( up to 247 units )
Protocol  Modbus Protocol RTU mode
Address 1 - 247
Baud Rate 0.3 ~ 38.4 Kbits/sec
Data Bits 7 or 8 bits
Parity Bit None, Even or Odd
Stop Bit 1 or 2 bits
Communication Buffer 160 bytes

Analog Retransmission  
Output Signal 4-20 mA, 0-20 mA, 0-1V, 0-5V, 1-5V, 0-10V
Resolution 15 bits
Accuracy ±0.05 % of span ±0.0025 %/ °C
Load Resistance 0 - 500 ohms ( for current output ),10 K ohm minimum ( for voltage output )
Output Regulation  0.01 % for full load change

User Interface  
Single 4-digit LED Displays 10mm (C21, C91)
Keypad 3 keys(C21), 4 keys(C91)
Programming Port For automatic setup, calibration and testing
Communication Port Connection to PC for supervisory control

Control Mode  
Output 1 Reverse ( heating ) or direct ( cooling )action
Output 2 PID cooling control, cooling P band 50 ~ 300% of PB, dead band -36.0 ~ 36.0% of PB
ON-OFF 0.1 - 90.0 ( °F ) hysteresis control ( P band = 0 )
P or PD  0 - 100.0 % offset adjustment
PID Fuzzy logic modified , Proportional band 0.1 ~ 900.0°F ,
Integral time 0 - 3600 seconds , Derivative time 0 - 360.0 seconds
Cycle Time 0.1 - 100.0 seconds
Manual Control Heat (MV1) and Cool (MV2)
Auto-tuning Cold start and warm start
Failure Mode Auto-transfer to manual mode while sensor break or A-D converter damage
Ramping Control 0 ~ 900.0°F/minute or 0 ~ 900.0 °F/hour ramp rate
Sleep Mode Enable or Disable
Ramping Control  0 ~ 500.0 °C/minute or 0 ~ 500.0 °C/hour ramp rate

Digital Filter  
Function First order
Time Constant 0, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 seconds programmable

Environmental & Physical  
Operating Temperature -10°C ~ 50°C
Storage Temperature -40°C ~ 60°C
Humidity 0 to 90 % RH ( non-condensing )
Altitude 2000m maximum
Pollution  Degree 2
Insulation Resistance 20 Mohms min. ( at 500 VDC )
Dielectric Strength  2000 VAC, 50/60 Hz for 1 minute
Vibration Resistance 10 - 55 Hz, 10 m/s² for 2 hours
Shock Resistance 200 m/s² ( 20 g )
Moldings Flame retardant polycarbonate
Dimensions C21 ---50mm(W) X 26.5mm(H) X 110.5mm(D), 98.0 mm depth behind panel
C91 ---48mm(W) X 48mm(H) X 94mm(D), 86 mm depth behind panel
Mounting C21 ---panel mount, cutout 22 X 45( mm )
C91 ---panel mount, cutout 45 X 45 ( mm )
Weight C21 --- 120 grams
C91 --- 140 grams

Approval Standards
Safety UL 61010C-1 , CSA C22.2 No. 24-93 , EN61010-1 (IEC1010-1)
Protective Class NEMA 4X ( IP65 ) front panel for C21,
IP30 front panel for C91, all indoor use,
IP20 housing and terminals
EMC EN61326

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