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EM-1220 Hardware User’s Manual EM-1220 Functionality

EM-1220 Embedded Module Functions

The EM-1220 Embedded Module is designed to be integrated directly into the user’s system and

application. The module has two software-selectable RS-232/422/485 serial ports, dual 10/100

Mbps LAN ports, 1 RS-232 console port, and GPIO/SD signals. In addition, the EM-1220 uses the

Moxa ART ARM9 32-bit 192 MHz communication processor, which ensures excellent

performance for data transmission.

The pre-installed μClinux Kernel 2.6.9 makes it easy for users to develop programs for a variety of

applications. The EM-1220 is an ideal solution for manufacturing automation, intelligent

transportation monitoring, and remote device control.

RS-232/422/485 Serial Ports

The EM-1220 Embedded Module has 2 software-selectable RS-232/422/485 serial ports. Pin

assignment diagrams are shown in a later section. The ports can be configured by software. Please

refer to Software User’s Manual for details.

Console Port

The EM-1220 Embedded Module has 1 console port for onsite configuration. The port supports

TxD, RxD, and GND RS-232 signals. However, it can also be used as a serial port with standard

RS-232 interface. Refer to the Software User’s Manual for details.

LAN Ports

The EM-1220 Embedded Module has 2 10/100 Mbps LAN ports that can be used to set up a

redundant Ethernet network for non-stop operation, and the on-board transformer provides 1.5 KV

isolation protection.

SD Signals

The EM-1220 Embedded Module provides SD signals for storage expansion. Designers can use

these signals to create an SD socket. Note that you can use a Secure Digital (SD) memory card

compliant with the SD 1.0 standard to provide up to 1 GB of additional memory space. However,

the SD signals share the same mechanical layout with the GPIO. When you enable the SD signals,

the GPIO function will be disabled, and vice versa.

GPIO

The EM-1220 Embedded Module provides 10 software-selectable GPIOs. Note that users can

choose to enable either the SD Signals or the GPIO function, but not both. When you enable the

GPIO function, the SD Signals will be disabled.

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