ACTiSYS ACT-IR320L User manual

The Wireless Connectivity Expert

48511 Warm Springs Blvd., Suite 206, Fremont, CA 94539, USA

Tel: +1-510 490-8024 Fax: +1-510-623-7268

Web: http://www.actisys.com, E-mail: [email protected]

ACT-IR320L

LONG DISTANCE INFRARED ADAPTER

USER’S MANUAL

November 6, 2006

Version 1.0

The Wireless Connectivity Expert

ACT-IR320L

User’s Manual

Version 1.0

TABLE OF CONTENT

REVISION HISTORY ............................................................................................. 3

1. OVERVIEW ............................................................................................................. 4

2. FEATURES .............................................................................................................. 4

3. APPLICATION DESCRIPTION ............................................................................. 5

4. DTE-DB9M CONNECTOR DESCRIPTION ......................................................... 6

5. CHARACTERISTICS AND SPECIFICATIONS ................................................... 6

6. LED BEHAVIOR..................................................................................................... 6

The Wireless Connectivity Expert

ACT-IR320L

User’s Manual

Version 1.0

REVISION HISTORY

Revision History

Revision Date Comment

0.1 02/28/2002 Draft Preliminary Design Specification for internal review.

1.0 11/06/2006 Added LED behavior chapter & changed connection distance

ACTiSYS reserves the right to make changes without further notice to any products herein to improve

reliability, function or design. ACTiSYS does not assume any liability arising out of the application or use of

any product or circuit described herein.

The Wireless Connectivity Expert

ACT-IR320L

User’s Manual

Version 1.0

1. OVERVIEW

The ACT-IR320L is a long distance infrared adapter that enables the host system with long distance infrared

communication capabilities. The host system may be an industrial controller, a data collector, a medical

instrument, or any other device. The interface between ACT-IR320L and the host is the traditional

asynchronous serial data port (RS232C). Figure 1.1 shows the system block diagram.

Figure 1.1 System Block

Level

Converter

Micro controller Logic

Circuit

Optical

Transceiver

RS232C

ACT-IR320L

2. FEATURES

 Long distance transmitting / receiving adapter by using 455 KHz ASK-IR technology.

 Supports maximum 30 meters transmitting / receiving distance.

 Supports 9.6 kbps, 19.2 kbps and 38.4 kbps baud rate.

 Instantly converts RS232 Port to IR, without special IrDA protocol SW and uses existing application SW.

 True cable-to-IR replacement using ASK-IR technology.

 No buffer in circuit, no delay caused.

 Need to be used in pairs.

The Wireless Connectivity Expert

ACT-IR320L

User’s Manual

Version 1.0

3. APPLICATION DESCRIPTION

ACT-IR320L uses 455 KHz ASK-IR technology to support long distance transmitting / receiving. ASK-IR is a

technology that based on sub-carrier and it is not compatible to IrDA. Therefore, it should be used in pairs.

Once ACT-IR320L is connected to serial port of host device, it enters into ready mode. The LED is on. Two

ways can make IR320L to enter into active mode. One is the host device sends some data to it by passing

RxD pin. Another is that IR320L receives ASK sub-carrier from outside and passes those data to TxD pin.

When IR320L is in active mode, the LED blinks.

ACT-IR320L detects RxD pin’s level and turns the ASK sub-carrier on and off when it is sending data. Thus

no need to care about baud rate setting. It’s only limited by the frequency of ASK modulation. The baud rate

supports up to 38.4 kbps.

Generally, there are two ways to connect to a serial port. One is 3-wires (Flow Control free), while another is

9-wires (Flow Control enabled). Based on ACT-IR320L no buffer in circuit, it is a 3-wires operating dongle. It

doesn’t have to enable flow control mechanism. It means that it doesn’t detect the DSR and CTS pins from

host device and always pull DTR and RTS pins to high. Application program itself should take care of flow

control.

The radiant intensity of ACT-IR320L relates to angle between two dongles that face to face. The angle of half

intensity is +/- 10o. It will get more effective performance by adjusting angle.

The Wireless Connectivity Expert

ACT-IR320L

User’s Manual

4. DTE-DB9M CONNECTOR DESCRIPTION

ACT-IR320L is a DTE adapter, like serial port on PC. It can be connected to any DCE device directly. If you

want to connect this adapter to a Notebook or Desktop computer, the DB9F-to-DB9F converter is needed.

The converter plays like a null-modem, redirecting serial port signals from DTE to another DTE.

Pin No. Name Descriptions I/O

1 CD

Data Carrier Detect I

2 RXD Receiver Data I

3 TXD Transmitter Data O

4 DTR Data Terminal Ready O

5 GND Signal Ground GND

6 DSR Data Set Ready I

7 RTS Request to Send O

8 CTS Clear to Send I

9 RI Ring Indicator I

Front View

5. CHARACTERISTICS AND SPECIFICATIONS

Parameter Min. Typical Max. Units

DC supply voltage 5.0 7.5 12 V

Supply voltage, VSS 0 V

Operating temperature range 0 60 ℃

DC current (Ready mode) 2 mA

DC current (Active mode) 200 300 mA

RS232 signal threshold level +/-3 +/-12 +/-25 V

6. LED BEHAVIOR

Activities Status LED Behavior

COM port closed & disconnected LED off

Ready (COM port opened & connected) mode LED on

Active (Data transfer) mode LED blinks once per bit

Version 1.0

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