Moxa Technologies EM-1240-LX user manual Connecting to the Network, Connecting to a Serial Device

EM-1240-LX User’s Manual Introduction

Connecting to the Network

Connect one end of the Ethernet cable to the EM-1240-LX’s 10/100M Ethernet port and the other end of the cable to the Ethernet network. If the cable is properly connected, the EM-1240-LX will indicate a valid connection to the Ethernet in the following ways:

yThe top-right LED on the connector glows a solid green when connected to a 100 Mbps Ethernet network.

yThe top-left LED on the connector glows a solid orange when connected to a 10 Mbps Ethernet network.

yThe LEDs will flash when Ethernet packets are being transmitted or received.

The 10/100 Mbps Ethernet LAN 1 and LAN 2 ports use 8-pin RJ45 connectors. Pinouts for these ports are given in the following diagram.

8-pin RJ45

10 Mbps		100 Mbps	Pin	Signal
indicator		indicator	1	ETx+
			2	ETx-
			3	ERx+
			4	---
			5	---
			6	ERx-
1	8
			7	---
			8	---

Connecting to a Serial Device

Connect the serial cable between the EM-1240-LX and the serial device(s).

Serial ports P1 and P2 use male DB9 connectors, and can be configured for RS-232/422/485 by software. The pin assignments are shown in the following table:

DB9 Male Port		RS-232/422/485 Pinouts
1 2 3 4 5
	Pin	RS-232	RS-422	RS-485	RS-485
				(4-wire)	(2-wire)
	1	DCD	TxDA(-)	TxDA(-)	---
	2	RxD	TxDB(+)	TxDB(+)	---
	3	TxD	RxDB(+)	RxDB(+)	DataB(+)
	4	DTR	RxDA(-)	RxDA(-)	DataA(-)
6 7 8 9
	5	GND	GND	GND	GND
	6	DSR	---	---	---
	7	RTS	---	---	---
	8	CTS	---	---	---

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