6 UNIVERSAL I/O CARD
3021M100-002
6-5
6.2 Universal I/O Cable
The Universal I/O module is equipped with an octopus cable that features a
VHDCI connector on one end and 5 cable legs equipped with RS-232 connectors
on the other end. This allows the Universal I/O module to support 5 interfaces
through a single port. The Universal I/O cable is available for 3 types of
interfaces: V.24, X.21, and V.35. A combination of these interfaces can b
achieved by using the RS-232/V.24 cable, and adding X.21 and/or V.35 interfac
adaptors.
6.3 Configuration
Each port of the Universal I/O card is hardware configurable for the following:
• physical interface (V.24, V.35, or X.21)
• DTE or DCE operation
• clock source (internal or external) and split clock
Miniature PCBs are used to configure each port. The PCBs enable cross-
connections for the various options and do not contain active components. Th
orientation of the three PCBs, one for each configurable option, determines the
setting of the port’s attributes. Each of the five ports must be individually
configured using this method.
6.3.1 Physical Protocol Configuration
The PCB for selecting the physical protocol has contacts on three edges, one edge
for each protocol. To configure a protocol, simply insert the PCB edge that is
labelled with the required protocol into the connector. Physical interface
connectors are located at J12, J22, J32, J42 and J52. Figure 6-4 shows th
orientation of the PCB for configuring the V.35 protocol.
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