C21 50x26mm Panel Mount Electronic Temperature Controller
C21 50x26mm Panel Mount Electronic Temperature Controller
C21
Product Description

50x26mm

Panel Mount Electronic Temperature Controller
0.00

Brainchild C21 is a 1/32 DIN size panel mount electronic temperature controller. This temperature control unit is powered by 11-26 or 90-250 VDC/VAC supply, incorporating a 2 amp. control relay output as standard. The second output can be used as cooling control, an alarm or dwell timer. Its fast sampling rate allows the unit to control fast processes. The C21 model is widely applied in the following industries: plastic/rubber injection molding, vacuum furnace equipment, semiconductor temperature process control program, ceramic sintering furnace, fiber dyeing and drying, etc.

The Fuzzy Logic plus PID microprocessor-based temperature controllers, 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.

 UL CSA
  • 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
Power 
90 - 250 VAC, 47 - 63 Hz, 10VA, 5W maximum
11 - 26 VAC / VDC, SELV, Limited Energy, 10VA, 5W maximum
Input 1Characteristics 
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 2Linear 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
Documentation
Catalog- LF0C91Download
User Manual- UM0C911HDownload
Software&Firmware
Software- BC-Set ProDownload
Software- BC-Set_V2.0Download

*BC-SET Pro Compatible models:

300 series
4300, 2500, 8300, 9300  Version above V48R6
100 series
9100, 4100, 7100, 8100 Version above V31
C91, C21 Version above V33
Ramp and Soak Controller
P41, P91 Version above V36 
Limit controller
L41 Version above V15
L91 Version above V22
L62, L22, L42 Version above V01
C series 
C62/B62,C22,R22 Version above V16
C42,C72,C82,C83 Version above V08R2
C42-P,C72-P,C82-P,C83-P Version above V7.0
RSC Version above V4.0

Plastic/rubber industry

It is installed on the heating material tube of the injection molding machine to control the temperature of the raw material, effectively control the liquid temperature of the plastic and improve the molding quality of the product.
Installed on the hot runner system for temperature control of runners and gates to stabilize the quality of the plastic.
Temperature control on the mold temperature machine, indirectly adjusting the temperature of the mold by adjusting the temperature of the hot fluid, can improve the production efficiency of the product and reduce the generation of defective products.

Electric heating furnace industry

Vacuum furnace equipment / vacuum melting / vacuum heat treatment

A new algorithm for PID adjustment using fuzzy rules is used to adjust the PID algorithm to eliminate the PID saturation integral phenomenon when the error is large. When the error is small, the improved PID algorithm is used for adjustment and can be automatically adjusted. Learn and memorize some of the characteristics of the controlled object to optimize the effect

Semiconductor industry

The temperature control of the electric heating cloth package is often used for the heating of the exhaust pipe valve parts of the semiconductor factory, the panel factory, or the special steel cylinder.

In the semiconductor temperature process control program, the heating system of the chamber, such as the decane process, the dichloromethane process

Ceramic / kiln / glass industry

Ceramic sintering furnace:

The heating process on the sintering furnace controls the heating rate to obtain a finished product with better quality and stability.

Electric kiln:

Temperature adjustment during kiln firing to obtain a finished product with better quality and stability.

Fiber machinery

Dyeing machine:

control the temperature during dyeing to a suitable range, which in turn reduces chromatic aberration and improves the quality of dyed products.

Fiber dryer:

The temperature during drying is controlled within a suitable range to improve the fiber product.

other

Temperature Controller

Constant temperature and humidity machine
Heating/cooling air conditioning

1 2 3 4 5 6
1 Power Input 4: 90 - 250 VAC, 47-63 HZ
5: 11 - 26 VAC or VDC, SELV, Limited Energy
2 Signal Input 1: Standard Input
Thermocouple: J, K, T, E, B, R, S, N, L
RTD: PT100 DIN, PT100 JIS 
2: 0 - 60 mV
3: 0 - 1 V
4: 0 - 5 V
5: 1 - 5 V
6: 4 - 20 mA
7: 0 - 20 mA
8: 0 - 10V
9: Special Order
3 Output 1 0: None
1: Relay rated 2A / 240VAC
2: Pulsed voltage to drive SSR, 5V / 30mA
3: Isolated 4 - 20mA / 0 - 20mA
4: Isolated 1 - 5V / 0 - 5V
5: Isolated 0 - 10V
6: Triac output 1A / 240VAC,SSR
C: Pulsed voltage to drive SSR, 14V/40mA
9: Special order
4 Output 2 0: None
1: Form A relay 2A / 240VAC
2: Pulsed voltage to drive SSR, 5V / 30mA
3: Isolated 4 - 20mA / 0 - 20mA
4: Isolated 1 - 5V / 0 - 5V
5: Isolated 0 - 10V
6: Triac output, 1A / 240VAC, SSR
7: Isolated 20V / 25mA transducer power supply
8: Isolated 12V / 40mA transducer power supply
9: Isolated 5V / 80mA transducer power supply
A: RS-485 interface (for C91)
C: Pulsed voltage to drive SSR, 14V/40mA
D: Retransmit 4-20mA / 0-20mA (for C91)
E: Retransmit 1-5V / 0-5V (for C91)
F: Retransmit 0-10V (for C91)
B: Special order
5 Communications 0: None
1: RS-485 interface
2: RS-232 interface(for C21)
3: Retransmit 4 - 20 mA / 0 - 20 mA(for C21)
4: Retransmit 1 - 5V / 0 - 5V(for C21)
5: Retransmit 0 - 10V(for C21)
9: Special order
6 Display Color 0: Red color
1: Green color

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