SUPCON SB3073-Ex Temperature Transmitter Type Isolated Intrinsically Safe Safety Barrier

SUPCON SB3073-Ex Temperature Transmitter Type Isolated Intrinsically Safe Safety Barrier

I. Product Full Name
Temperature Transmitter Isolated Explosion-proof Safety Barrier (SB3000-Ex Series)
Brand: SUPCON Zhejiang Zhongkong (domestic DCS mainstream explosion-proof isolation barrier)
Main Purpose: Collect temperature probe signals in hazardous areas + Isolate safe energy + Signal conversion and output, specially designed for petrochemical, chemical, and oil and gas explosion-proof scenarios
Core Functions
A. Explosion-proof: Limit the transmission of electrical energy from the control room to the 0 zone / 1 zone hazardous area to prevent electric sparks from igniting flammable and explosive gases; Explosion-proof grade Ex ia IIC T4~T6 Ga, applicable to the highest explosion-proof area Zone 0
Integrated Integration: Safety barrier + Temperature transmitter + Electrical isolation in one unit
Collect on-site thermocouple / thermal resistance temperature signals, isolate and convert them into standard 4~20mA / 1~5V DC signals and send them to the central control ECS700/ECS100 DCS system
Three-terminal complete magnetic-electric isolation for power supply, input, and output, strong resistance to industrial interference

Detailed Technical Parameters
1) Channels and Input Signals (Single Channel)
Channel: 1 Input 1 Output
Can connect two types of temperature measurement elements (same hardware, order / programming selected type):
✅ Thermocouple: K, J, E, T, S, R, B, N full types, input millivolt range: -75 ~ +75mV
✅ Thermoresistor: Pt100, Pt1000, Cu50; Resistance range: 0~450Ω
Pt100 temperature measurement range: -200℃ ~ 850℃; Cu50: -50~150℃
Thermocouple comes with automatic cold junction compensation, accuracy ±1℃
2) Output Signals (Choose one, set by software)
Standard: 4~20mA DC (most commonly used)
Optional: 1~5V DC voltage signal
3) Break-line Fault Alarm
When the temperature measurement line is open-circuited, the current is fixedly output:
Lower limit fault: 1.8mA
Upper limit over-limit fault: 22mA
The DCS can directly recognize the break-line alarm
4) Electrical and Environmental
Power Supply: DC 24V (standard power supply for control cabinet)
Response Time: ≤5ms
Operating Temperature: -20℃ ~ +60℃
Size: 114.5 × 99 × 17.5 mm
Installation: Standard 35mm DIN rail snap-in installation
Terminal: Screwed fixed wiring terminal
Protection: IP20 (installed in the control cabinet)
5) Calibration Configuration
The body comes with a dedicated programming interface, and with the matching data cable, it can be modified by computer: temperature measurement type, temperature range, output mode, no need for hardware modification

Model Suffix Meaning
Ex: Intrinsically Safe Explosion-proof Certification (Intrinsic Safety Type), without Ex suffix is an ordinary isolation device, cannot be used in explosion-proof areas

Lifecycle & Replacement Options
Production Cycle: Main production from 2008 to 2020; After 2021, the original factory gradually stopped the SB3000 old series
Current Status: The original factory’s new model upgrade replacement: SB5000 series temperature safety barrier, pin, installation, and signals are fully compatible, can be directly replaced;
spare parts market: The existing supply sources are mostly new inventory and dismantled second-hand industrial control spare parts.

Similar Models in the Same Series
SB3073-Ex: 1 Input 1 Output Temperature Transmitter Isolated Explosion-proof Safety Barrier (mainly used)
SB3075-Ex: 1 Input 2 Output Temperature Signal Isolation Distribution Safety Barrier