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Home | Products | Controllers & Displays | Controllers | Digital Controllers | C21

C21 – 50x26mm Electronic Temperature Controller

Low cost process and temperature controller.

c21 Electronic Temperature Controller
Brainchild C21 Low Cost Digital Controller

C21 Features

  • Autotuning controller with fuzzy logic + PID processing.
  • Configurable input: Thermocouple or RTD.
  • Outputs: mA, SSR drive, Relay (Please specify when     ordering)
  • Selectable alarm modes
  • 1 alarm relay.
  • Standard Power supply: 90~240Vac.
  • Soft start ramp and dwell timer
  • 4 digit display.
  • IP65 front panel and IP20 house and terminals
  • Low cost, easy to use
Brand: BRAINCHILD
Usually in stock
Request a quote
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  • Product Details
  • Technical Specs
  • Ordering Information
  • Documents

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.

 

Power
90 – 250 VAC, 47 – 63 Hz, 10VA, 5W maximum
111 – 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 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.

 

TYPE Range Accuracy@25°C Input Impedance
J -120°C -1000°C (-184°F -1832°F) ±2°C 2.2MΩ
K -200°C -1370°C (-328°F -2498°F) ±2°C 2.2MΩ
T -250°C -400°C (-418°F -752°F) ±2°C 2.2MΩ
E -100°C -900°C (-148°F -1652°F) ±2°C 2.2MΩ
B 0°C -1820°C (32°F -3308°F) ±2°C (200°C – 1820°C) 2.2MΩ
R 0°C-1767.8°C (32°F -3214°F) ±2°C 2.2MΩ
S 0°C -1767.8°C (32°F -3214°F) ±2°C 2.2MΩ
N -250°C -1300°C (-418°F -2372°F) ±2°C 2.2MΩ
L -200°C -900°C (-328°F -1652°F) ±2°C 2.2MΩ
PT100 (DIN) -210°C -700°C (-346°F -1292°F) ±0.4°C 1.3KΩ
PT100 (JIS) -200°C -600°C (-328°F -1112°F) ±0.4°C 1.3KΩ
mV -8mV -70mV ±0.05% 2.2MΩ
mA -3mA -27mA ±0.05% 70.5Ω
V -1.3V-11.5V ±0.05% 302KΩ

 

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

 

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 0.01 % for full load change
Output Settling Time 0.1 sec. ( stable to 99.9 % )
Isolation Breakdown Voltage 1000VAC
Temperature Effect ±0.0025 % 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 Functions Dwell timer,
Deviation High / Low Alarm,
Deviation Band High / Low Alarm
Process High / Low Alarm
Alarm 1 Relay Form A,Max. rating 2A/240VAC, life cycles 200,000 for resistive load.
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 50 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 ~ 500.0 °C ,
Integral time 0 – 1000 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
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 )
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
Altitude 2000m maximum

 

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
C-21-(1)-(2)-(3)-(4)-(5)-(6)
1 Power Input4: 90 - 250 VAC, 47-63 HZ
5: 11 - 26 VAC or VDC, SELV, Limited Energy
2 Signal Input1: 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 10: 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 20: 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 Communications0: 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 Color0: Red color
1: Green color
  • Brainchild Low Cost Digital Controllers - Brochure 318.61 KB
  • Brainchild C21 Digital Controller - User Manual 981.95 KB

Product Range

Product Range:
CodeSpecificationsPriceQuantity
BTC-C21-411101

Digital Controller, 48 x 24mm, Standard input, Relay/Alarm, 90~250Vac

$289.00
BTC-C21-412101

Digital Controller, 48 x 24mm, Standard input, SSR/Alarm, 90~250Vac

$289.00
BTC-C21-413101

Digital Controller, 48 x 24mm, Standard input, 4~20mA/Alarm, 90~250Vac

$289.00
BTC-C21-511101

Digital Controller, 48 x 24mm, Standard input, Relay/Alarm, 11~26Vac/dc

$289.00
All prices are in NZ$, and GST exclusive and are subject to change without notice.

Intech Instruments Ltd are New Zealand distributors for Brainchild products. Please contact the Brainchild distributor in your country if you require sales or service support for Brainchild products.

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