MS7923 (MS7924) thermistor input signal isolator (supports output circuit power supply)

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

The thermal resistance temperature transmitter is powered by an independent DC power supply and supports output circuit 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 thermistor: P100; P110; Cu50; Cu100 and other types of thermal resistors

Allowable wire resistance: ≤ 10 Ω per wire

● 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):<25mA (1 in 1 out)

<35mA (1 in 2 out)

● Comprehensive parameters

Standard accuracy: ± 0.1% (refer to the table of thermal resistance types, ranges, and measurement errors)

Temperature drift: Basic error/10 ℃

Response time:<10ms

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)