Advantech PCI-1753E Manual do Utilizador descarregar pdf (Página 4)

4 Startup Manual

Dry Contact Support for Digital Input

Each digital input channel accepts either dry contact or

0 ~ 5 VDC wet contact inputs. Dry contact capability

allows the channel to respond to changes in external cir-

cuitry (e.g., the closing of a switch in the external cir-

cuitry) when no voltage is present in the external

circuit. Figure 3-1 shows external circuitry with both

wet and dry contact components, connected as an input

source to one of the card’s digital input channels.

PIN Assignment Connection

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