MS7911 (MS7912) thermocouple input signal isolator (supports output circuit power supply)

·Suitable for thermocouple or other millivolt signal input, after isolation, converted into standard 4-20mA current signal output to control system or other instruments.

·The thermocouple temperature transmitter is powered by an independent DC power supply and supports transmission loop power supply, with isolation between the power supply input output.

Standard 35mm DIN rail card installation. Plug and unplug terminal block with spring compression connection.

● Input

Input thermocouple: K; E; S;B; R;T; N;W; J and other types of thermocouples

Optional millivolt signal input: -5-+60mV range;

***Small millivolt range: 3mV

● Output

Output current (lo): 4-20mA

Output circuit power supply voltage (Ue): 12-35V

Voltage drop (Ud): 5V

Output load resistance (RL): Calculation formula RL ≤ (Ue Ud) ÷ 0.02

Output ripple:<10mVp-p

Note: The selection of power supply voltage for the output circuit should be determined based on the size of the load. If the voltage is too high and the load is very small, it will aggravate the heating condition of the isolator. ）

● Power supply

Power supply voltage range: 20~30VDC

Rated supply voltage: 24VDC

Current consumption (when powered by 24VDC):<30mA (1 in 1 out)

<42mA (1 in 2 out)

Standard accuracy: ± 0.1% (see thermocouple type, range, and measurement error table)

Cold end temperature error: ± 1 ℃

Cold end temperature compensation range: -5~+60 ℃

(Cold end compensation resistor has been installed inside the temperature transmitter)

Temperature drift: Basic error/10 ℃

Response time:<10ms

Compensation temperature stabilization time:<1 minute

Isolation capability: 2.5KV, 1min, 50Hz between input output power supply

Insulation resistance: ≥ 100M Ω/500VDC between input output power supply

Working environment temperature: -20~+60 ℃

Storage environment temperature: -40~+80 ℃

Shell material/protection level: PC (polycarbonate) material/IP20

Dimensions: 16 × 116 × 110 (mm)