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Brainchild C21/C91 Established Process and Temperature controllers

Introduction

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.

Brainchild C21/C91 Established process and temperature controllers 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.

Brainchild C21/C91 General Information

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.

  • 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

Brainchild C21/C91 Model

  • C21 : 50x26mm
  • C91: 48x48mm
  • BTC-4100: 96x96mm
  • BTC-7100 : 72x72mm
  • BTC-8100: 48x96mm
  • BTC-9100: 48x48mm
  • BTC-9090: 48x48mm

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