Brainchild BTC-2500 Temperature Thermostat

The BTC-2500 Temperature Thermostat is available with 3 outputs, 2 from the list above as well as an alarm output.

All BrainChild Fuzzy Logic plus PID microprocessor-based temperature controller, incorporate two bright, easy to read 4-digit LED displays, 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.

All BTC Temperature Thermostat models have programmable rate of temperature rise and an inbuilt timer that will bring a process up to temperature at a set rate and hold it for a predetermined time before switching off.

BrainChild is professional and experienced in the field of high-performance and quality temperature controllers. No matter what kinds of industrial electronic temperature controls you need, we are confident to satisfy your specific requirements.

The Fuzzy Logic plus PID microprocessor-based temperature controller, incorporate two bright, easy to read 4-digit LED displays, 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.

Feature

Fast input sample rate (5 times / second)
Basic & full function
User menu configurable
Pump control
Fuzzy+PID microprocessor-based control
Automatic programming
Differential control
Auto-tune function
Self-tune function
Sleep mode function
“Soft-start ” ramp and dwell timer
Programmable inputs (thermocouple,RTD,mA,VDC)
Analog input for remote set point and CT
Event input for changing function & set point
Programmable digital filter
Hardware lockout + romote lockout protection
Loop break alarm
Heater break alarm
Sensor break alarm+Bumpless transfer
RS-485,RS-232 communication
Analong retransmission
Signal conditioner DC power supply
A wide variety of output modules available
Safety UL / CSA / IEC1010-1
EMC / CE EN 61326

Specification

Power
90 – 264 VAC, 47 – 63 Hz, 15VA, 15W maximum
11 – 26 VAC / VDC, SELV, Limited Energy, 15VA, 7W 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, 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 ~ 1820 °C (32 ~ 3308 °F)	±2 °C (200°C – 1820°C)	2.2MΩ
R	0 ~ 1768 °C (32 ~ 3214 °F)	±2 °C	2.2MΩ
S	0 ~ 1768 °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%	302KΩ

Input 2	Characteristics
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
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

Input 2
Type	Range	Accuracy@ 25 °C	Input Impedance
CT94-1	0-50.0 A	±2% of Reading ±0.2A	302K
mA	-3 ~ 27mA	±0.05%	70.5 +0.8V / input current
V	-1.3 ~ 11.5V	±0.05%	302KΩ

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/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
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	Form A or Form B for BTC-9300, Form C for BTC4300, BTC-8300, 5V Logic output for BTC-2500 Max. Rating 2A/240VAC, life cycles 200,000 for resistive load.
Alarm 2 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, 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	Normal, Latching, Hold, Latching / Hold.
Dwell Timer	0 – 6553.5 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
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	Dual 4-digit LED Displays
BTC-4300	Upper 0.55″ ( 14mm ) Lower 0.4″ ( 10 mm )
BTC-8300, BTC-9300	Upper 0.4″ ( 10 mm ) Lower 0.31″ ( 8 mm )
BTC-2500	0.4″(10mm)
Keypad	3 keys
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 ( °C ) 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 ~ 500.0 °C/minute or 0 ~ 500.0 °C/hour ramp rate
Sleep Mode	Enable or Disable
Ramping Control	0 ~ 500.0 °C/minute or 0 ~ 500.0 °C/hour ramp rate
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 & 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	BTC-4300 —96mm(W) X 96mm(H) X 66mm(D), 53 mm depth behind panel BTC-8300 —48mm(W) X 96mm(H) X 80mm(D), 65 mm depth behind panel BTC-9300 —50.7mm(W) X 50.7mm(H) X 88.5mm(D), 75mm depth behind panel BTC-2500 —50mm(W) X 26.5mm(H) X 110.5 mm(D), 98.0 mm depth behind panel
Mounting	BTC-4300 —panel mount, cutout 92 X 92 ( mm ) BTC-8300 —panel mount, cutout 45 X 92 ( mm ) BTC-9300 —panel mount, cutout 45 X 45 ( mm ) BTC-2500 —panel mount, cutout 45 X 22.2 ( mm )
Weight	BTC-4300 — 255 grams BTC-8300 — 220 grams BTC-9300 — 150 gram BTC-2500 — 120 grams

Approval Standards
Safety	UL 61010C-1 , CSA C22.2 No. 24-93 , EN61010-1 (IEC1010-1)
Protective Class	BTC-8300, BTC-4300: IP 20 housing and terminals with protective covers. BTC-2500, BTC-9300: NEMA 4X(IP65) front panel , IP 20 housing and terminals
EMC	EN61326