Delta AH500 Hardware Operation Manual page 225

A H 5 0 0 H a r d w a r e a n d O p e r a t i o n M a n u a l
4.8.1.3 Open-collector Input Type

Sinking
(NPN transistor whose collector is open)
NPN

Sourcing
(PNP transistor whose collector is open)
PNP
4 - 5 8
I/O
X0.0
S/S
24VDC
I/O
+Vcc
X0.0
S/S
0V
24VDC
Internal
circuit
Internal
circuit