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Cabling
The pin assignment of the parallel interface DB25 female connector is arranged such that
shield and data lines are ordered sequentially on a ribbon cable. If discrete wires are used, the
shield and data lines need to be twisted together to eliminate potential crosstalk.
The pin assignment of the power/serial (DB9) interface is arranged to accommodate discrete
wires. The two data lines are run as a twisted pair, and the power and ground lines are run as a
twisted pair. The shield is used to encase both of the twisted pairs within the cable.
When using the parallel interface, a common ground is required for the master/slave power
supply.
Installing the Switch
To install the switch:
1. Mount the chassis using the four holes provided (Figure 6). An M3 lug with maximum thread
depth in the unit of 5 mm is recommended.
Fiber
Cable
Figure 6: Mounting Hole Locations for Fiber and Cable Versions
Getting Started – 13
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