Installation, Wiring,
and Specifications
2–22
Installation, Wiring, and Specifications
DL05 Micro PLCs with DC inputs are particularly
flexible because they can be either sinking or
sourcing. The dual diodes (shown to the right) allow
current to flow in either direction. The inputs accept
10.8 – 26.4 VDC. The target applications are +12
VDC and +24 VDC. You can actually wire half of the
inputs as DC sinking and the other half as DC
sourcing. Inputs grouped by a common must be all
sinking or all sourcing.
PLC DC Input
Input
Common
In the first and simplest example below, all commons are connected together and all
inputs are sinking.
+
–
+24 VDC
In the next example, the first four inputs are sinking, and the last four are sourcing.
+
–
+
–
+24 VDC +12 VDC
DC Input Wiring
Methods
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