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DataNET Fiber Optic Connections, 
Continued 
 
The DataNET Fiber Optic Couplers use ST-style connectors (twist & 
lock). Always insure that the TX (Transmit) on one end of the link is 
connected to the RX (Receive) at the other end of the link. Some duplex 
fiber optic cables are coded to help monitor the direction of data travel. If 
the fibers are not coded, special attention must be paid to insure a 
proper connection.  
Figure 1-3: Fiber Optic 
Coupler 
 
Receive
Darker Gray Color
Transmit
Connector End View
Fiber End View
Pin 5 GND
Pin 3 Receive
Pin1 +5V
Pin 2 GND
Pin 4 XMIT
Ping 6 GND
 
2000592-001 
Installation 
  17