Passive Loop Powered Isolator

DR910

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Loop Powered
Isolated
0 to 20 mA, 4 to 20 mA Ranges
Din Rail Mountable

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Description

The DR910 passive isolator is used for the electrical isolation and processing of analog 0 to 20 mA or 4 to 20 mA standard current signals. The DR910 provides electrical isolation between the control electronics and process I/O. In addition, interference signals above 75 Hz are effectively suppressed. Input and output circuit do not require separate auxiliary power.

The DR910 obtains power from the input signal. The modules are snapped onto symmetrical DIN rails in accordance with EN 50 022. When using the DR910, ensure that the current-driving voltage of the measuring transducer is sufficient for driving the maximum current of 20 mA, with a power loss of 2.5 V (2.5 V + (20 mA * RLOAD). Voltage drop across the input is calculated by determining the load resistance of the output loop, drawing a vertical line to the curve (see diagram), then horizontally to the voltage drop.

The energy for the supply on the input side is taken from the analog input signal. Due to the dynamic input resistance, a power loss of approximately 2.5 V drops at the module input.

SPECIFICATIONS
Input Range: 0 to 20 mA, 4 to 20 mA
Maximum Input Current/Voltage: 50 mA/30 Vdc
Input Resistance@ 20 mA: 125 to 1125 Ω (dependent on load)
Voltage Drop at Input: See Chart on PDF
Maximum Input Frequency: <75 Hz
Response Time: 5 msec max
Output Signal: 0 to 20 mA, 4 to 20 mA
Max Load Resistance: <1375 Ω @ 20 mA
Isolation Voltage: 510 V, 50 Hz, for 1 minute
Accuracy: <0.1% of full scale
Operating Temperature: -10 to 70°C (14 to 158°F)
Temperature Coeficient: <0.002%/K of the measured value
Enclosure: Case body is green, Polyamide PA
Mounting: Standard DIN style rail, including top hat (T) profile rail according to EN50022 - 35 X 7.5 and 35 X 15, and G profile rail according to EN50035 - G32.
Weight: 84.4 g (3 oz)

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Part Number/ Desc.

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Description

DR910

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Passive loop powered isolator

RAIL-35-1

AUD29.58

Availability: 1 week

35 mm (1.4") DIN rail, 1 m (3.3') length

RAIL-35-2