DB9 Pin Assignments, Ethernet Port RJ-45 | Black Box RS-422, RS-232

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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		LES301A user manual

RS-422, RS-485, 1-Port 10/100 Device Server, RS-232 specifications

The Black Box IC113C and IC175C are part of a series of versatile RS-485 interface converters designed to facilitate reliable data transmission over long distances. RS-485 is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems, and these specific Black Box converters exemplify the technology's adaptability and robustness.

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