Applied-motion STAC6-C Manuel d'utilisateur télécharger pdf (Page 29)

STAC6 Hardware manual

920-0029 Rev. C

5/2/2012

What is COM?

“Common” is an electronics term for an electrical connection to a common voltage. Sometimes “common”

means the same thing as “ground”, but not always. In the case of the STAC6, if you are using sourcing

(PNP) input signals, then you will want to connect COM to ground (power supply -). If you are using sinking

(NPN) signals, then COM must connect to power supply +.

Note: If current is owing into or out of an input, the logic state of that input is low or closed. If no current is

owing, or the input is not connected, the logic state is high or open.

Digital Input Connection Examples

IN/OUT1

switch or relay

(closed=logic low)

X3..X7

X COM

12-24

VDC

Power

Supply

Connecting an Input to a Switch or Relay

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Applied-motion STAC6-C Manuel d'utilisateur Page 29