Isolated Transmitter 250T-P 350T-P 450T-P

The 250T-P, 350T-P, 450T-P models are Potentiometer / Slidewire Input Isolated Transmitters. They are Loop, DC or AC Powered and produce DC Voltage or DC Current Output. They have a resistance of 100 to 10,000 ohm 3-wire Pot/slidewire.

250T: Loop-powered transmitter series

350T: DC-powered transmitter series

450T: AC-powered transmitter series

The Acromag 250T-P, 350T-P, 450T-P is an Isolated Transmitter.

Firstly, the performance specifications consist of:

Input Ranges: Resistance, 100 to 10,000 ohm three-wire pot/slidewire

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 Isolated Transmitter 250T-P, 350T-P, 450T-P includes:

  • Excellent accuracy and stability ensure reliable measurements in harsh industrial environments
  • RFI and EMI resistance minimize the effects of environmental noise
  • 75% span adjustment enables precise application calibration
  • Compact, 1-inch 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
  • 1500V AC peak isolation (250V AC or 354V DC continuous) prevents ground loops
  • 250T models: Input isolated from output/power
  • 350T models: Input isolated from output and power. Output and power share a common
  • 450T models: 3-way isolation. Input, output, and power circuits are isolated from each other
  • Operating temperature range: -25 to 85°C


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