Black Box RS-422, RS-232 Specifications, Page, 1.3 DB9 Pin Assignments, Ethernet Port RJ-45

Chapter 1: Specifications

1.3 DB9 Pin Assignments

Table 1-1 shows the LES301A unit’s DB9 connector pin assignments.

Table 1-1. DB9 connector pin assignments.

Pin	RS-232 full-duplex	2-Wire RS-485 half-duplex	RS-422/4-Wire RS-485 full-duplex
1	DCD	N/A	N/A
2	RXD	N/A	TXD+
3	TXD	DATA+	RXD+
4	DTR	N/A	N/A
5	SG (Signal Ground)	SG (Signal Ground)	SG (Signal Ground)
6	DSR	N/A	N/A
7	RTS	DATA-	RXD-
8	CTS	N/A	TXD-
9	N/A	N/A	N/A

NOTE: You may need an LES30X-TB5 adapter for RS-485 or RS-422 applications.

1.4 Ethernet Port (RJ-45)

Figure 1-1. RJ-45 connector pinout.

Table 1-2. RJ-45 connector pin assignment.

Pin Assignment	568A Definition	568B Definition
1	Green-White	Orange-White
2	Green	Orange
3	Orange-White	Green-White
4	Blue	Blue
5	Blue-White	Blue-White
6	Orange	Green
7	Brown-White	Brown-White
8	Brown	Brown

You can choose either 568A or 568B pinning. To make a crossover cable, use 568A pinning at one end of a UTP cable and use 568B pinning at the other end of the UTP cable.

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