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The PANEL-IR module converts serial data between electrical and infra-red formats. Ideal for
applications that require remote control or dangerous environments where cables would be a
safety risk, PANEL-IR employs the IrDA infra-red communications standard to achieve reliable
transfer of data. The snap-in integral bezel makes installation quick and easy.
• Panel mounted
• Uses IrDA Communication Standard
• Connects to Microcontroller, UART,
or EasyLog Module
PIN FUNCTIONS
1. Polarity
Selects whether the transmit/receive lines use positive or negative logic.
Connect to 0V for positive logic. Connect to V+ or leave unconnected for negative logic.
2. Disable
Disables the receiver/transmitter. Connect to 0V to disable.
Connect to V+ or leave unconnected to enable.
3. N/C
No connection. Do not connect anything to this pin.
4. 0V
0V Power supply.
5. V+
5V Power supply.
6. Baud 3
7. Baud 2
Baud rate select (see table overleaf).
8. Baud 1
9. RxD
Receive data - received data appears on this pin.
10. TxD
Transmit data - apply data to be transmitted to this pin.
If the PANEL-IR is solely used for receiving data then TxD should be connected to V+ via a 47k resistor.
Baud rate
Select the baud rate as shown in the table. Where a "0" is shown, either connect the pin to 0V or leave it unconnected. Where a
"1" is shown, connect the pin to V+.
APPLICATION NOTES
Communication can take place at distances from 0m (i.e. "nose-to-nose") to 1m. The red window of the PANEL-IR module
should be pointed at the window of the device at the other end of the infra-red link. The infra-red light beam spans
approximately 30°, so the two devices do not have to be directly aligned. There should however be a clear line of sight
between the two devices. At close range, communication is more forgiving and small obstacles will not affect the link.
Protocol
The PANEL-IR module acts as a "transparent" data translator i.e.: there is no built-in communications protocol to adhere to.
The device works by transmitting an IR pulse for "Low" bits, and not transmitting anything for "High" bits. Since the first bit of
the serial byte (the start bit) is always "Low", this marks the start of the byte. Subsequent bits are synchronised from there. Take
care to set the Polarity pin (pin 1) correctly For more detailed application advice, contact Lascar Electronics.
Connection to EasyLog Data Logging Modules
Connect as shown below to give your EL-1 infra-red communication capability. The flying leads should be soldered into the
two PCB holes on the EL-1 module, at the left hand end of the 10-way pin header. A 1K resistor must be fitted as shown if a
serial communication cable is used in addition to the infra-red link, otherwise it can be omitted.
Typical application: industrial controller
The PANEL-IR module forms part of an infra-red communications link between two totally isolated systems.
The PANEL-IR module will communicate with any computer featuring an IrDA compatible serial port, or any other PC fitted
with a Lascar EASYLINK-IR adapter.
• Half-duplex Communications
• 10-Way Pin Header
(EL-1 issue 9 and above)
2
APPLICATION NOTES
NOTES D'APPLICATION
1m (3.3ft/
piedi
)
30°
PANEL-IR
Connection to EasyLog Data Logging Modules
Connexion aux modules de saisie de données EasyLog
Anschluß an EasyLog Datenlogger-Module
Connessione a moduli di registrazione dei dati EasyLog
TxD
RxD
V+
5V
0V
PANEL-IR
Typical application: industrial controller
Application typique : contrôleur industriel
Microcontroller
Microcontrôleur
Mikrosteuerung
PANEL-IR
Microcontrollore
RxD
UART
TxD
Isolation barrier
barrière d'isolation
Trennwand
barriera isolante
ANWENDUNGSHINWEISE
NOTE APPLICATIVE
1m (3.3ft/
piedi
)
PANEL-IR
PANEL-IR
(EL-1 issue 9 and above)
(EL-1 version 9 et plus)
(EL-1 Ausgabe 9 und höher)
(EL-1, Versione 9 e seguenti)
+
-
V-
1K
EL-1
Typische Anwendung: Industrielle Steuerung
Applicazione tipica: controllore industriale
RS232 driver
TxD
RxD
Pilote RS232
RS232-Treiber
Driver RS232
PANEL-IR
e.g. MAX232 LT1081
par ex. MAX232 LT1081
wie z.B. MAX232 LT1081
es. MAX232 LT1081
7
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