Plc Connections - Photon Focus D/L-2048 User Manual

6 Hardware Interface
An example of improper wiring that causes a ground loop is shown in Fig. 6.17.
C o n n e c t i n g C A M _ G N D a n d
G r o u n d l o o p
I S O _ G N D t h e w r o n g w a y
1 s o l a t o r
I S O _ I N
I S O _ G N D
C A M _ G N D
G r o u n d l o o p
G r o u n d p l a n e v o l t a g e d i f f e r e n c e
Figure 6.17: Improper I/O wiring causing a ground loop

6.6 PLC connections

The PLC (Programmable Logic Controller) is a powerful device where some camera inputs and
outputs can be manipulated and software interrupts can be generated. Sample settings and an
introduction to PLC are shown in Section 7.10. PLC is described in detail in the document [PLC].
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