SMC Networks CDUJB10-20D, Manual

Page: 15 / 28

Basic Wiring
Solid state 3-wire, NPN
Sink input specifications
2-wire
Source input specifications
2-wire with 2-switch AND connection 2-wire with 2-switch OR connection
2-wire 2-wire
Solid state 3-wire, PNP
Example: Power supply is 24VDC
Internal voltage drop in switch is 4V
Example: Load impedance is 3k
Ω
Leakage current from switch is 1mA
(Power supplies for switch and load are separate.)
Connection Examples for AND (Series) and OR (Parallel)
Examples of Connection to PLC
Connect according to the applicable
PLC input specifications, as the con-
nection method will vary depending
on the PLC input specifications.
When two switches are
connected in series, a load
may malfunction because
the load voltage will drop
when in the ON state.
The indicator lights will
light up if both of the
switches are in the ON
state. <Solid state>
When two switches
are connected in
parallel, malfunction
may occur because
the load voltage will
increase when in
the OFF state.
Blue
[Black]
Main
switch
circuit
Load
Brown
[Red]
Black
[White]
Main
switch
circuit
Brown
[Red]
Load
Blue
[Black]
Black
[White]
Main
switch
circuit
Load
Blue
[Black]
Brown
[Red]
Main
switch
circuit
Load
Blue
[Black]
Brown
[Red]
Main
switch
circuit
Load
Brown
[Red]
Blue
[Black]
Black
[White]
PLC internal circuit
COM
Switch
Input
Black
[White]
Brown
[Red]
Blue
[Black]
PLC internal circuit
COM
Switch
Input
Brown
[Red]
Blue
[Black]
PLC internal circuit
Switch
Input
COM
Blue
[Black]
Brown
[Red]
PLC internal circuit
COM
Switch
Input
Black
[White]
Brown
[Red]
Blue
[Black]
Switch 1
Switch 2
Load
Blue
[Black]
Brown
[Red]
Blue
[Black]
Brown
[Red]
Switch 1
Switch 2
Load
Brown
[Red]
Blue
[Black]
Brown
[Red]
Blue
[Black]
3-wire
OR connection for NPN output
Switch 1
Switch 2
Load Switch 1
Brown
[Red]
Switch 2
Black
[White]
Blue
[Black]
Relay
Relay
Black
[White]
Load
Relay
contact
AND connection for NPN output
(using relays)
Switch 1
Brown
[Red]
Switch 2
Load
Brown
[Red]
AND connection for NPN output
(performed with switches only)
The indicator lights will light up when
both switches are turned ON.
<Solid state>
3-wire, NPN 3-wire, PNP
Brown [Red]
Blue
[Black]
Blue
[Black]
Black
[White]
Black
[White]
Blue
[Black]
Brown
[Red]
Blue
[Black]
Black
[White]
Blue
[Black]
Black
[White]
Brown
[Red]
Load voltage at ON = – x 2 pcs.
= 24V – 4V x 2 pcs.
= 16V
Power supply
voltage
Internal
voltage
drop
Leakage
current
Load
impedance
Load voltage at OFF = x 2 pcs. x
= 1mA x 2 pcs. x 3k
Ω
= 6V
Note) Lead wire colors inside [ ] are those prior
to conformity with IEC standards.
Series
CUJ
Auto Switch Wiring Connections
and Examples
12