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