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)
