RMS Technologies R325P DRIVER - Manual (Page 10)

Figure 6.1
Using the R325P with more than 5V
You can choose to supply the optos with the R325P’s internal 5V supply by jumping pins 1 to 4. But if you
choose to use more than 5V, for example, a 24V supply and the step pulse train is also a 0 to 24V low-high
signal, please use the following recommended resistor to limit the current to 10 mAmps. Note: no resistor will
be needed on the actual opto supply line, pin 1.
Step & Direction lines have a 470 ohm internal resistor
Voltage: 5V 10V 12V 24V
Ohms needed: 0 500 1000 2000
Wattage rating: 0 ¼ watt ¼ watt ¼ watt
Table 6.1
Disable line has a 1k ohm internal resistor
Voltage: 5V 10V 12V 24V
Ohms needed: 0 1000 1900 3800
Wattage rating: 0 1/8 watt 1/8 watt ¼ watt
Table 6.2
RMS Technologies Page 10 Version 1.01
R325PE Single Axis Closed loop Driver/Indexer Manual 5/29/2013