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Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex
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Power supplies & barriers supplies e.g. a transmitter with power, if required also in the Ex-area, and then transmits the galvanically isolated signal. With the optionally available HART® monitoring the status of the transmitter is monitored. Thus even just briefly occurring errors can be easily located.
Portfolio description
Our portfolio of DIN rail power supplies & barriers provides:
Power supplies for 2 or 4 wire transmitters
Active barrier with power supply for safe separation of 4...20 mA current circuits in one device
Power supplies & barriers with bidirectional HART® transmission, communication sockets for HART® and integrated HART® resistor for sensor configuration
Application example - power supply of a temperature transmitter: If a 4 to 20 mA HART® head transmitter is installed in a thermometer it has to be supplied with power. An active barrier supplies the head transmitter with power, if required also in the Ex-area, and then transmits the galvanically isolated signal. With the optionally available HART® monitoring the status of the head transmitter is monitored. If an error arises a relay at the active barrier sends an alarm.
Application example for a passive barrier with SPS: If a sensor in the Ex-area is to be supplied via a SPS the use of a passive barrier is necessary. The passive barrier transmits the supply from the Non-Ex area into the Ex-area and sends back the 4 to 20 mA signal. The passive barrier does not require a power supply as it receives its power from the 4 to 20 mA loop.
Benefits
Wide range power supply, flexible power source
Power supplies for 2 or 4 wire transmitters
Galvanic isolation of 4 to 20 mA current circuits
International Ex approvals, Germanischer Lloyd / marine approval available
Sensor monitoring with early-warning system
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Brochure field of activity system products
System products and data managers - Solutions for the loop
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