Page
16
of
18
ADU71 User Manual
If the device under control requires a 0-10VDC input, a 500 ohm resistor ( or two 250 ohm resistors in series)
should be shunted across the input terminals of the device under control. The ADU71 LOOP is then programmed
to provide 0-20mA to the loop as shown in Figure 5.
CAUTION: Ensure the resistor is correctly and firmly connected to the device input terminals. If the resistor is
not correctly connected, or open circuit, the ADU71 will apply 24VDC to the input of the device under control
when the ADU71 loop current is enabled. This may damage the input circuitry of the device under control.
Figure 5 : ADU71 driving a 0-10VDC input VFD or valve.
Multiple voltage input devices can also be connected to the ADU71 LOOP output provided each is shunted by the
appropriate resistor as shown in Figure 6.
Figure 6 : ADU71 driving multiple 0-5VDC voltage input devices with 0-20mA output.