ROI-XMA loop powered 4-20mA transmitters

ROI-XMA loop powered 4-20mA transmitters

The ROI-XMA series is a versatile family of loop powered 4-20mA transmitters with built in sensor excitation. Signal ranges can be from mV to V with sensor excitation of 2.5Vdc or 5Vdc. Versions are available for full bridge sensor or sensors that require bridge completion, for sensors between 100 Ohm and 10K Ohm impedance. Transmitter supply voltage may be from 7.5 to 36Vdc. Output circuit is reverse connection protected and filtered.

Input sensor data, into your PLC or USB A-D; using standard:

4-20mA input A-D channels.
0-20mA input A-D channels.
0-5Vdc input A-D channels.
0-10Vdc input A-D channels.

No need to replace working sensors, you can signal condition your sensors to make them compatible with most modern industrial control systems.

Loop powered sensor 4-20mA transmitter, signal conditioner format; configured as:

Temperature transmitters, such as thermistor transmitters and RTD transmitters.
Position transmitters, such as potentiometer transmitters.
mV transmitters, to be used as bridge transmitters such as pressure transmitters.

4-20mA loop transmitters are used where weak sensor signals need to be connected long distances to PLC or PC A-D.
Robert Owen Inc manufactures: 100 ohm & 1000 ohm Platinum (PT100 & PT1000) RTD 4-20mA transmitters, 2252 ohm and 10K ohm NTC thermistor 4-20mA transmitters, bridge Sensor 4-20mA transmitters, potentiometer 4-20mA transmitters, resistive sensor 4-20mA transmitters, and mV 4-20mA transmitters.