ADLINK LPCI-7230 - Manual (Page 37)

Installation 29
EICOM: Common ground or common power of isolated input
channels #8 to 15.
IDI_nH: High input of isolated differential DI channel #n.
IDI_nL: Low input of isolated differential DI channel #n.
EOGND: Ground return path of isolated output channels.
VDD: Power input signal for fly-wheel diode of DO channels.
ISO5V: Isolatied power output 5V.