Power Transmitter 250T-AC 350T-AC 450T-AC

These transmitters convert 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-AC 350T-AC and 450T-AC are a Loop, DC or AC Power Transmitter that converts sensor inputs to output signals.

Firstly, they accept 50/60 Hz, 0 to 150V AC and 0 to 20A Inputs. They produce 4 to 20mA or 0 to 5V or 0 to 10V Outputs. The power requirements depend on the model used as shown below.

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


Other features of the Loop DC or AC Power Transmitter 250T-AC 350T-AC 450T-AC include:

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments.
  • External AC current sensor with DC mA output enables remote mounting of transmitter (for safe monitoring of the AC signal)
  • AC current range is a function of sensor primary turns for easy rescaling in field
  • Factory-calibrated AC current transmitter does not need recalibration
  • RFI and EMI resistance minimize the effects of environmental noise.
  • Compact, 1-inch wide housing uses less space.
  • Low power consumption. (350T as low as 9mA).
  • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops.
  • 250T: Input isolated from output/power
  • 350T: Input isolated from output and power. Output and power share a common.
  • 450T: 3-way isolation Input, output, and power circuits are isolated from each other.
  • Operating temperature range: -25 to 85°C


Finally, for more information, contact us.


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