Installation 
Table 2-7 Terminals for connecting a UDC to a MDI Compliant Hub or Switch  
UDC Terminal  UDC Signal Name  RJ45 Socket Pin #  Switch Signal 
Name 
Position 14 Shield Shield Shield 
Position 15  RXD-  6  TXD- 
Position 16  RXD+  3  TXD+ 
Position 17  TXD-  2  RXD- 
Position 18  TXD+  1  RXD+ 
 
Table 2-8 shows how to connect a UDC directly to a PC utilizing a straight-through cable 
(wiring the UDC cable this way makes the necessary cross-over connections)
 
Table 2-8 Terminals for connecting a UDC directly to a PC utilizing a straight-
through cable 
UDC Terminal  UDC Signal Name  RJ45 Socket Pin #  PC Signal Name 
Position 14 Shield Shield Shield 
Position 15  RXD-  2  TXD- 
Position 16  RXD+  1  TXD+ 
Position 17  TXD-  6  RXD- 
Position 18  TXD+  3  RXD+ 
 
 
12 
13 
+
 
 
uxiliary 
Load 
 0 - 1000 
Connect shield 
to ground at one 
end only. 
1 
1 
uxiliary Output and Digital Input 2 are mutually exclusive. 
Auxiliary Output
 
10 
11 
+
 
 
Digital 
Input #1
Connect shield 
to ground at one 
end only. 
Digital Inputs
 
1 
12 
13 
+
 
 
Digital 
Input #2
 
Figure 2-17 Auxiliary Output and Digital Inputs Option Connections 
 
34  UDC3200 Universal Digital Controller Product Manual  12/04