TW147HLTW147HL is a two-wire loop powered PWM signal conditioning module, converting PWM signal into 4-20mA current signal, which have no need for DAC. It is in compact package (SIP9) and offers 2000VAC isolation and excellent temperature drift (≤50PPM/℃ at operating temperature of -40 ℃ to +85 ℃), suitable for two-wire smart field instrument application.

Obtaining power directly from back-end current loop to supply front-end equips, TW147HL isolates the PWM signal from the front-end equips and converts it into 4-20mA two-wire current signal. Integrated HART signal, the series realize half duplex communication between the field area and control area.

The series adopt electromagnetic isolation technology and high performance power feedback, achieving the function of converting PWM signal into isolated standard 4-20mA accurately which matches instruments analog input port such as PLC, DCS, etc.


Suitable for two-wire smart field instrument application

Two-wire loop powered

PWM signal input

HART compatible

High linearity (0.1% F.S.)

Compact size: SIP9 package (26*9.5*12.5mm)

Extremely low temperature coefficient: 50ppm/℃ (TYP)

Operating temperature range: -40℃to +85℃

ESD protection (bare component ±4KV)

Isolated power output: 3.3VDC/4mA