Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 538)

I/O Interface
Section 10A
10A-15
Important: When an inductive load (a relay, for example) is directly
connected to the output circuit, connect a noise suppressor in the circuit,
parallel with the load.
Figure 10A.9
Output Device Requiring a Noise Suppressor
Fiber
optics
MTB Panel I/O Module
MTB Panel
Operator Panel
Noise
suppressor
Load
dc power
supply
11315-I
Converted
from optical
to electrical
signal
+12V
Common
Output
Common
Table 10A.I lists the connectors used to make the fiber optic connections to
the I/O ring. Each module connected to the system I/O ring has an optical
transmitter and receiver. Fiber optic cables connect transmitters to
receivers to form the I/O ring. Refer to Appendix A for additional
information on fiber optic cables and connectors.
Table 10A.I
Push-Button MTB Panel I/O Module Fiber Optic Connectors
Connector on Rotary MTB
Panel I/O Module
Connected To Remark
OP11 (RED) Receiver on next module in I/O ring Output
OP12 (BLacK) Transmitter on previous module in I/O ring Input
10A.2.3
Push-Button MTB Panel I/O
Module Fiber Optic
Connection