Loop DC or AC Power Transmitter

The 250T-mV, 350T-mV, 450T-mV are a Loop, DC or AC Power Transmitter. These models convert sensor inputs to proportional process current or voltage output signals.

250T: Loop-powered transmitter series

350T: DC-powered transmitter series

450T: AC-powered transmitter series

The Acromag 250T-mV, 350T-mV and 450T-mV are a Loop, DC or AC Power Transmitter.

Input Ranges milliVolt:

-25 to 250mV.

Narrow Span: 3 to 5mV, custom calibration.

Output Ranges

DC Current: 4 to 20mA.

DC voltage: 0 to 5V or 0 to 10V.

Power Requirements

250T: 12 to 50V DC @ 20mA (loop-powered).


350T: DC Voltage Source

Output Range Power

4 to 20mA 10 to 36V DC @ 30mA

0 to 5V 10 to 36V DC @ 9mA

0 to 10V 12.5 to 36V DC @ 9mA


450T: 115V or 230V AC, ±10%, 50 to 60Hz

Output Range Power

4 to 20mA 115V AC @ 0.050A

4 to 20mA 230V AC @ 0.025A

0 to 5V, 0 to 10V 115V AC @ 0.020A

0 to 5V, 0 to 10V 230V AC @ 0.010A


Ambient Temperature Range:

Operating: -25 to 85°C

Storage: -40 to 85°C


Features of the Loop, DC or AC Power Transmitter 250T-mV, 350T-mV, 450T-mV includes:

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
  • RFI and EMI resistance minimize the effects of environmental noise
  • 90% span adjustment enables precise application calibration
  • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops
  • Compact, 2.54cm wide housing uses less space for easier installation in control panels
  • Low power consumption. 350T units operate on currents as low as 9mA to help prevent expensive upgrades to larger power supplies


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