Operating instructions
Nordson Photosensor Wiring 
Connections 
Installation 
3-21 
WARNING: Risk 
of 
electrocution. 
The 
AC 
input power line to 
the 
PC40 provides voltage that can cause personal injury or 
death. Before making any electrical connections, disconnect 
and lock out power 
to 
the main circuit breaker for the input 
power line (see Figure 3.8). 
1. 
Connect the wires for each photosensor as indicated in Table 3.7 or 
Table 3.8. See Figure 3.9 
for 
the location 
of 
terminal block P4. 
Table 
3. 
7 - Nordson Photosensor Wire Connections (except Through-
beam Emitter,  PIN 
131 
473) 
Wire Color  Function  Trigger 
#1 
Connection  Trigger #2 (if used) 
Terminal Connection 
Red 
+VDC  P4-1  ("+12V"}  P4-5 
(" 
+ 12V") 
Green  Sourcing output  None; clip lead.  None; clip lead. 
White  Sinking output 
P4-2 ("TRIGGER 1"}  P4-6 ("TRIGGER 2") 
Black  Common  P4-3 
("GROUNDj 
P4-7 
("GROUNDj 
Table 3.
8-
Nordson Through-beam Emitter, 
PIN 
131 
473 
Wire Color Code 
Wire 
Color 
Brown 
Blue 
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Function 
+VDC 
Common 
Trigger 
#1 
Terminal Connection 
Trigger 
#2 (if used) 
Terminal Connection 
P4-1 
("+12V")  P4-5 
(" 
+ 12V") 
P4-3 
("GROUNDj 
P4-7 
("GROUNDj 
2. Ground the other end 
of 
each photosensor shield near the sensor. 
3. 
If 
you are NOT connecting remote devices 
at 
this time, 
do 
the 
following: 
a. 
Grasp the front assembly with one hand. Remove the two screws 
holding 
it 
to 
the back enclosure. 
b. 
Carefully rotate the front assembly 180" and place it on the back 
enclosure. 
c. Replace and tighten the two loose screws. 
d. Tighten the four remaining screws. 
4. Align the sensors by following the instructions that follow. 
PIN 108 389A 
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