ECI1000 Network Motion Control Card Hardware Manual Version1.4
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Connection with Panasonic A5 servo low-speed differential pulse
Some servo drives are not optocoupler isolation (such as, Panasonic economical
servo), now the 2th GND must be connected with drive GND.
2.2.6.3
Wiring Reference for High-speed Differential Pulse Axis
If the low-speed differential pulse meets speed requirement, use low-speed
differential pulse preferentially. Or if need to use high-speed differential pulse, do
connect internal digital GND of controller with reference ground of drive high-
speed pulse port.