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  5. Classic Performance Series | 50 x 26 mm  BTC-2500

Classic Performance Series | 50 x 26 mm

BTC-2500
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Process and Temperature Controllers

• Compact 1/32 DIN size (48×24mm)
• Stable control with fuzzy + PID logic
• Supports T/C, RTD, voltage, and mA
• Auto/manual tuning for flexibility
• LED display with compact panel mount

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Features Applications Specification Download FAQ Ordering Code

Features

  • Compact 1/32 DIN size (48x24 mm)
  • Universal input: T/C, RTD, voltage, mA signals
  • Dual 18-bit A/D and 15-bit D/A resolution
  • Auto-tune and self-tune for stable control
  • Supports fuzzy logic + PID control
  • Supports analog retransmission output
  • Heater, loop, and sensor break alarms
  • Programmable digital filtering function
  • Front panel sealed to IP65 for indoor use
  • Event input for mode & setpoint change

  • Soft-start ramp with dwell timer control
  • Fast sampling rate: 5 times per second
  • Supports RS-485 and RS-232 communication
  • Analog input for remote setpoint control
  • CE, UL, CSA certified for global safety

DIN-Size Fuzzy PID Process Controllers

Universal input and flexible outputs in compact DIN form

This unit is a compact DIN-size fuzzy PID controller designed for accurate and stable control in temperature and process applications. It supports universal inputs such as thermocouple, RTD, voltage, and current signals, enabling wide compatibility with industrial sensors. Output options include relay, SSR voltage, and analog (mA/V) for flexible control logic. Equipped with fuzzy logic enhancement, auto-tuning, manual tuning, and optional RS-232/RS-485 communication, this unit ensures dependable integration into modern automation systems. The intuitive panel interface and programmable alarms make it ideal for diverse factory environments.

Clear LED Display and 3-Key Navigation for Easy Setup 

This unit is equipped with a bright, high-contrast 4-digit LED display that shows real-time process values, set points, and configuration parameters with clarity. The intuitive 3-key interface allows operators to easily access menus, adjust control settings, initiate auto-tuning, and switch between operation modes. Clearly labeled indicators—including Output, Alarm, and Manual Mode—offer immediate visual confirmation of system status. The simplified front panel layout improves usability and minimizes training time, making it ideal for use in fast-paced production environments. With its responsive tactile buttons and well-organized navigation flow, this unit ensures reliable and error-free operation across various applications.

Universal compatibility with various signal types 

This controller supports a wide range of universal input signals including thermocouples, RTDs, voltage, and current inputs. The input type and range can be easily configured from the front panel, offering great flexibility in temperature or process control applications.  

Flexible output options for precise control  

The controller provides multiple output choices including relay, SSR drive, analog voltage, and current. Outputs are available with high resolution and isolation for reliable control, with some models offering dual output or retransmission functionality.

Fuzzy PID Technology   

Smarter Control with Less Overshoot and Faster Response  

Fuzzy logic is combined with traditional PID control to deliver smarter and more adaptive temperature regulation. Unlike standard PID controllers that require manual fine-tuning for each application, fuzzy PID dynamically adjusts control responses based on real-time process behavior. The result is faster stabilization, reduced overshoot, and improved resilience to disturbances—ideal for processes where precision and speed are critical.

Dedicated Programming Port for Easy Setup

Touch-port with special cable for offline configuration

The controller features a dedicated touch-type programming port, designed for use with the CC91-1 programming cable. This port allows fast and reliable offline parameter setup, calibration, and ATE-based testing, connecting to a PC or automated test equipment without accessing the main terminals.

To ensure system integrity, this port is intended for setup and testing only. It should be disconnected during normal operation. Optional adapters such as the SNA12A can convert this port for RS-232 communications if required.

BC-SET Pro Configuration Software

Easy parameter setup, backup and firmware upgrade

BC-SET Pro is the official configuration software developed by BrainChild for its over-temperature protection controllers. With a streamlined and intuitive interface, the software allows users to connect via USB programming cable and quickly configure control parameters. It supports efficient parameter editing, setting duplication between devices, and firmware upgrades to maintain device performance and stability. BC-SET Pro also enables offline configuration with the ability to save and manage multiple profiles, making it ideal for production environments, system deployment, and ongoing maintenance. Whether for new setup or existing system adjustment, this tool helps engineers and technicians simplify workflow, reduce setup time, and ensure consistent configuration across all devices.

Batch Read/Write for Multiple Controllers 

BC-SET allows users to connect multiple controllers of the same model and perform batch parameter read/write by defining a node address range. This feature significantly streamlines configuration in OEM or multi-device environments.

Clear and Accessible System Menu 

The system menu offers quick access to key operations like Rescan (F5), Read Data (F6), Write Data (F7), Write Multiple (F8), and Communication Settings (F9). Built-in hotkeys support fast, efficient navigation.

Intuitive Communication Setup Interface

The communication settings window lets users define COM port, baud rate, parity, data bits, and stop bits — with a “Default” button for quick reset and “Save and Exit” to finalize setup. Designed to reduce setup errors.

Visual Profile Editor for Programmable Controllers 

For controllers with profile functionality, BC-SET provides a graphical editor to configure temperature ramp/soak segments. Users can easily read, modify, and write profile parameters for precise thermal process control.

Applications

Specification


 Power

90-264 VAC, 47-63Hz, 15VA, 7W maximum

1-26 VAC/VDC, 15VA, 7W maximum
Input 1

Resolution

18 Bits

Sampling Rate

5 times / second

Maximum Rating

-2 VDC minimum, 12 VDC maximum( 1 minute for mA input )

Temperature Effect

±1.5uV/ BC for all inputs except mA input
±3.0uV/ BC 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)

120 dB

Normal Mode Rejection Ratio (NMRR)

55dB

Sensor Break Detection

Sensor open for TC, RTD and mV inputs,
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 characteristics

 Type

Range

Accuracy @ 25°C

Input Impedance

J

-120°C  ~ 1000°C( -184°F ~ 1,832°F)

±2°C

2.2 MΩ

K

-200°C ~ 1370°C (-328°F ~ 2498°F)

±2°C

2.2 MΩ

T

-250°C ~ 400°C ( -418°F ~  752°F )

±2°C

2.2 MΩ

E

-100°C ~ 900°C( -148°F ~ 1652°F )

±2°C

2.2 MΩ

B

0°C ~ 1800°C( 32°F ~  3272°F )

±2°C( 200°C ~ 1800°C )

2.2 MΩ

R

0°C ~ 1767.8°C( 32°F ~ 3214°F )

±2°C

2.2 MΩ

S

0°C ~ 1767.8°C( 32°F ~ 3214°F )

±2°C

2.2 MΩ

N

-250°C ~ 1300°C( -418°F ~ 2372°F)

±2°C

2.2 MΩ

L

 -200°C ~ 900°C( -328°F ~ 1652°F )

±2°C

2.2 MΩ

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

-8mA  ~ 70mA

±0.05%

2.2MΩ

mA

-3mA  ~ 27mA

±0.05%

70.5Ω

V

-1.3V  ~ 11.5V

±0.05%

650KΩ
Input 2

Resolution

18 bits

Sampling Rate

1.66 times / second

Maximum Rating

-2 VDC minimum, 12 VDC maximum

Emperature Effect

 ±1.5uV/ °C for all inputs except mA
input ±3.0uV/ °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

Below 1 mA for 4-20 mA input, below 0.25V for 1 - 5V input, unavailable for other inputs.

Sensor Break Responding Time

0.5 second

Characteristics

Type

Range

　Accuracy@ 25 °C

Input Impedance

CT94-1

0-50.0 A

±2% of Reading ±0.2A

302K

mA

-3 mA-27 D156mA

±0.05%

70.5 + 0.8V /input current

V

-1.3 V-11.5 V

±0.05%

302K
Input 3 (Event Input)　

Logic Low

-10V minimum, 0.8V maximum.

Logic High

2V minimum, 10V maximum

External pull-down Resistance

400 K maximum

External pull-up Resistance

1.5 M minimum

Functions

Select second set point and/or PID, reset alarm 1 and/or alarm 2, disable output 1 and/or output 2, remote lockout.
Output 1  / Output 2

Relay Rating

2A,240V AC,200000 Life Cycles 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

10 KΩ min.

1 ~ 5 V

0.9 ~ 1 V

5 ~ 5.25 V

10 KΩ min.

0 ~ 10 V

0 V

10 ~10.5 V

10 KΩ min.
Linear Output

Resolution

15 Bits

Output Regulation

0.02% for full load change

Output Settling Time

0.1 Second ( Stable to 99.9%)

Isolation Breakdown Voltage

1000 VAC

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

DC Voltage Supply Characteristics
(Installed at Output 2)

Type

Tolerance

Max. Output Current

Ripple Voltage

Isolation Barrier

20V

±1.0 V

25mA

0.2Vp-p

500VAC

12V

±0.6V

40mA

0.1Vp-p

500VAC

5V

±0.25V

80mA

0.05Vp-p

500VAC
Alarm 1 / Alarm 2 ( Output 2 )

Alarm 1 Relay

5V Logic output for BTC-2500

Alarm 1 Max. Rating

2A, 240VAC, 200000 Life Cycles for Resistive Load

Alarm 2 Relay Type

Form A

Alarm 2 Maximum Rating

2A, 240VAC, 200000 Life Cycles for Resistive Load

Alarm Functions

Dwell timer,
Deviation High / Low Alarm,
Deviation Band High / Low Alarm,
PV1 High / Low Alarm,
PV2 High / Low Alarm,
PV1 or PV2 High /Low Alarm,
PV1-PV2 High /Low Alarm,
Loop Break Alarm,
Sensor Break Alarm.

Alarm Mode

Latching, Hold, Normal, Latching/Hold

Dwell Timer

0 - 6553.5 minutes
 Data Communication

Interface

RS-232 ( 1 unit ), RS-485 ( up to 247 units )

Protocol

Modbus RTU (Slave Mode)

Address

1 ~ 247

Baudrate

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

Functions

PV1, PV2, PV1-PV2, PV2-PV1, Set Point,
MV1, MV2, PV-SV deviation value

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

Output Settling Time

0.1 sec. (stable to 99.9 % )

Isolation Breakdown Voltage

1000 VAC min.

Integral Linearity Error

±0.005 % of span

Temperature Effect

±0.0025 % of span/ °C

Saturation Low

0 mA ( or 0V )

Saturation High

22.2 mA ( or 5.55V, 11.1V min. )

Linear Output Range

0-22.2mA ( 0-20mA or 4-20mA ),
0-5.55V ( 0-5V, 1-5V ),
0-11.1 V ( 0-10V )
User Interface

Keypad

3 Keys

Display Type

4 Digit LED Display

No. of Display

1

Upper Display Size

0.4" (10mm)

Lower Display Size

-

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 1-255% of PB

ON-OFF

0.1 ~ 55.6 (°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 to 500.0°F/Minute or 0 to 500.0°F/Hour Ramp Rate

Sleep Mode

Enable or Disable

Power Limit

0 ~ 100 % output 1 and output 2

Pump / Pressure Control

Sophisticated functions provided

Remote Set Point

Programmable range for voltage or current input

Differential Control

Control PV1-PV2 at set point
Digital Filter

Function

First Order

Time Constant

0,0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 Seconds Programmable
 Environmental and Physical Specifications

Operating Temperature

-10°C ~ 50°C

Storage Temperature

-40°C ~ 60°C

Humidity

0 ~ 90 % RH (Non-Condensing)

Altitude

2000 Meters maximum

Pollution

Degree II

Insulation Resistance

20MΩ minimum(@500VDC)

Dielectric Strength

2000VAC,50/60 Hz for 1 Minute

Vibration Resistance

10 to 55 Hz , 10m/s2 for 2 Hours

Shock Resistance

200 m/s2(20g)

Moldings

Flame Retardant Polycarbonate

Mounting

Panel 

Dimensions (W*H*D) (mm)

50*26.5*110.5

Depth Behind Panel (mm)

98

Cut Out Dimensions (mm)

45*22.2

Weight (grams)

120
Approval Standards

Safety

UL 61010-1, 3rd Edition.CAN/CSA-C22.2 No. 61010-1(2012-05), 3rd Edition.

Protective Class

NEMA 4X(IP65) front panel , IP 20 housing and terminals

EMC

EN61326

Download

ClassicPerformanceSeries_Catalog_V1.02_EN

ClassicPerformanceSeries_Catalog_V1.01_CH
CoreSeries_Temperaturecontroller_QuickStartGuide_UMQOC621C_EN

CoreSeries_Temperaturecontroller_QuickStartGuide_TCEQSC01B_v2_CH
ClassicPerformanceSeries_BTC-2500_UserManual_UM25001I_EN
ClassicPerformanceSeries_BTC2500_UserManual_ParameterPropertyTable_EN

Software_BC_Set_2.0
Software_BC_Set_Pro_V1.1.0.12_2.0(above V48R6)
Software_USB_Update_Tool_V2.8B1

Software_DAQ_V2.73(2501)*1-hour trial only
Training_Demo_Data_Acquistion_Studio

Data_Logger_Firmware_XH10_v1.1.0.34​

Software_BC_Set_Pro_V1.1.0.12_2.0​
Software_DAQ_V2.73(2501)*1-hour trial only

Training_Demo_Data_Acquistion_Studio

UMEIO01A​
UMEIO01A​

IO_Brouchure_Ver.1.4/

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FAQ

What types of input signals are supported?

The controller supports universal input types, including thermocouple (T/C), RTD, voltage (mV), and current (mA). Input type is selectable via panel settings.

Can I use the controller to drive an SSR (Solid State Relay)?

Yes. The controller provides a pulsed voltage output (typically 12VDC or 5VDC) specifically for SSR driving.

Does the controller support both auto-tuning and manual tuning?

Yes. You can initiate auto-tuning from the front panel. Manual tuning of PID parameters is also supported for advanced control.  

What happens when the sensor breaks or fails?

The unit will trigger a sensor break alarm and optionally switch to manual mode to protect the process.

Is the panel waterproof? What is the IP rating?

Yes. The BTC-2500 features a front panel rated IP65, which protects against dust and low-pressure water jets, making it suitable for most industrial indoor environments.

Ordering Code

BTC-2500
4: 90 ~ 264 VAC, 47 / 63 Hz
5: 11 ~ 26 VAC or VDC
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