Using An Isolated Power Supply - Galil Motion Control DMC-1600 Series User Manual

The optoisolated inputs are connected in the following groups
Group (Controllers with 1- 4 Axes)
IN1-IN8, ABORT
FLX,RLX,HOMEX
FLY,RLY,HOMEY
FLZ,RLZ,HOMEZ
FLW,RLW,HOMEW
LSCOM
INCOM
Figure 3-1. The Optoisolated Inputs

Using an Isolated Power Supply

To take full advantage of opto-isolation, an isolated power supply should be used to provide the
voltage at the input common connection. When using an isolated power supply, do not connect
the ground of the isolated power to the ground of the controller. A power supply in the voltage
range between 5 to 28 Volts may be applied directly (see Figure 3-2). For voltages greater than 28
Volts, a resistor, R, is needed in series with the input such that
DMC-1600
FLSX HOMEX
RLSX
IN1 IN2 IN3
1 mA < V supply/(R + 2.2K
Group (Controllers with 5 - 9 Axes)
IN1-IN16, ABORT
FLX,RLX,HOMEX,FLY,RLY,HOMEY
FLZ,RLZ,HOMEZ,FLW,RLW,HOMEW
FLE,RLE,HOMEE,FLF,RLF,HOMEF
FLG,RLG,HOMEG,FLH,RLH,HOMEH
RLSY
FLSY HOMEY
IN4 IN5 IN6
Ω
) < 15 mA
Chapter 3 Connecting Hardware • 35
Common
Signal
INCOM
LSCOM
IN7 IN8 ABORT