3.4 TP ports
Connector pinout
On the CSM 1277, the TP ports are implemented as RJ-45 sockets with MDI-X assignment
(Medium Dependent Interface–Autocrossover) of a network component.
Figure 3-2 RJ-45 jacks
Figure 3-3 RJ-45 jack
Table 3-1 Pin assignment of the RJ-45 jack
Pin number Assignment
Pin 8 n. c.
Pin 7 n. c.
Pin 6 TD-
Pin 5 n. c.
Pin 4 n. c.
Pin 3 TD+
Pin 2 RD-
Pin 1 RD+
Product characteristics
3.4 TP ports
Compact Switch Module CSM 1277
14 Compact Operating Instructions, 06/2022, A2B00079397-02
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