3.4.2 Opto-Isolated Inputs
The standard models of the ME-630 series provide 8 opto-isolated
inputs (port B) and the models with option „-O“ provide 16 opto-
isolated inputs (port A and B). The opto-isolated inputs are
designed for 24 V level, which
is common in industrial environment (Low: 0 V…+12 V; High:
+13 V…+24 V). Make sure that a ground reference to the
external wiring is done by the various GND pins of the D-Sub
connector ST1. On the standard models these are the pins 21 and
40. Note on the models with „-O“ option, that for the higher and
lower significant half-byte separate grounds are used. Depending
on the wiring you must connect the pins 1, 6, 21 and 40
separately (see also table 2 and the pinout on page 19). If the
inputs are open a logical „0“ is returned (see diagram).
Port A
GND-pin
Port B
GND-pin
DI_A0…3
Pin 6 (GND_A0_3) DI_B0…3
Pin 21 (GND_B0_3)
DI_A4…7
Pin 1 (GND_A4_7) DI_B4…7
Pin 1 (GND_B4_7)
Summary of Contents for ME-630 Series
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