Resistance Transducers
Voltage to Resistance Transducers

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Electrically isolated resistive output
Failsafe to original control
Status indicators
Compact and economical

Voltage To Resistance Transducers
DRN3

The DRN3 is an interface that allows microprocessor control of a variable resistance. The DRN3 isolated resistor network is controlled by pulse, analog, or tri-state input signals. It directly replaces a variable resistive controller and simulates the action of a slide wire or rotary potentiometer. All connections of the simulated potentiometer, the wiper and both ends of the resistance range, are available on the DRN terminal strip.

The DRN3 has on-board failback relays that lock out the original resistive controller during DRN3 operation. However, if the DRN3 supply power is lost, control of the circuit will revert back to the original controller or user installed shunt, switch or fixed resistor. This feature allows remote hand and system overrides. There are LED indicators for the power and input signals.

Some of the applications of the DRN3 include electric actuator control, electronic potentiometer, resistive sensor simulation and remote volume control.

Voltage To Resistance Transducers - Technical Data

Supply:	24VAC or 24 Vdc, ± 10%, 250 mA max.
Dimensions:	6.2"L X 3.25"W X 1"H mounted on a snap track
Operating:	-20 to 150 deg F, 10% to 95% rH
Resolution:	256 steps (No Wrap Around)
Pulse off time:	80 milliseconds minimum
Tri-State rates of change:	5, 15, 30, 90 seconds
ANALOG RANGES:	0-5Vdc or 1-5Vdc; 0-15Vdc or 3-15Vdc; 0-10Vdc or 2-10Vdc 0-20mA or 4-20mA
IMPEDANCES:	Voltage/115K ohms; Current/250 ohms
RELAY CONTACTS:	Form C, Gold-clad Silver, 2 amp max. resistive @ 24V 100,000 operations