ACTiSYS ACT-IR320L User manual

The Wireless Connectivity Expert
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ACT-IR320L
LONG DISTANCE INFRARED ADAPTER
USER’S MANUAL
November 6, 2006
Version 1.0
© Copyright 2000-2006 ACTiSYS Corporation,
All Rights Reserved

The Wireless Connectivity Expert
ACT-IR320L
User’s Manual
Copyright 2000-2006 ACTiSYS Corp Page 2 of 6Nov. 6, 2006
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
Copyright 2000-2006 ACTiSYS Corp Page 3 of 6Nov. 6, 2006
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
Copyright 2000-2006 ACTiSYS Corp Page 4 of 6Nov. 6, 2006
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
Copyright 2000-2006 ACTiSYS Corp Page 5 of 6Nov. 6, 2006
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
Copyright 2000-2006 ACTiSYS Corp Page 6 of 6Nov. 6, 2006
Version 1.0