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Chapter 4 Installing Hardware

4-15

4.6.1.3 Open-collector Input Types

 Sinking (NPN input type)

S/S

I/O

Inter nal circuit

24VDC

+Vcc

NPN

Internal circuit

 Souring (PNP input type)

S/S

I/O

Internal Circuit

+Vcc

24VDC

PNP

Internal circuit

4.6.1.4 Two-wire Proximity Switch

Use the two-wire proximity switch whose leakage current IL is less than 1.5 mA when the switch is OFF. If the

leakage current is larger than 1.5 mA, connect the divider resistance Rb using the formula below.

5.1

−

≤

（k Ω）

 Sinking

S/S

I/O

Internal Circuit

I L

24VDC

Two-wire Proxim ity Switch

Delta DVP32ES300T User Manual

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