Users Manual IRTrans Version 2.12
7
Pin Configuration of the 8pin MiniDIN Socket:
!
1:
Masse / GND
!
2:
+8 – 16V= Supply Voltage Serial Bus
!
3:
Data I/O
!
4:
+5V stabilized Voltage (Input)
!
5:
Relay Contact PowerOn (1)
!
6:
Output for additional IR Transmitter (Anode / +)
!
7:
Output for additional IR Transmitter (Cathode / -)
!
8:
Relay Contact PowerOn (2)
If the additional 5V Input (Pin 4) is used, care must be taken that only
a stabilized Voltage of 5V is applied. A wrong voltage on that Pin
might destroy the IRTrans.
This Pin can be used to power the IRTrans via the Standby Voltage of an
ATX Power supply. That allows switching on the PC via Infrared together
with the PowerOn Option.
To protect the PC form Short Cuts this Supply Line should be
protected by a fuse.
The output for additional IR Transmitters might get damaged by
Shortcuts or applied voltages. Therefore extra care should be taken
when connecting external Transmitters.
If every Transceiver has its own Power Supply only the Pins 1 & 3 are
needed to make up the Serial Bus. If the Pins 1, 2 & 3 are used only one
IRTrans needs to have a Power Supply connected. It is not possible to
power Transceivers connected to the Serial Bus by the USB or RS232
Interface of the PC.
Every Transceiver connected to the Serial Bus has to be powered.
Otherwise Termination Problems and Malfunctions of the Serial Bus
may arise.
The Power Supply connector is used to Power Bus units or PC Units
while the PC is switched off. The external Power Supply has to deliver 8-
16V= with 50mA for each IRTrans connected to the Bus. The Plus Pole is
the inner contact of that Connector.
Only the DC Connector of the IRTrans should be used to power the
Serial Bus. This connector is protected by an automatic fuse. If the
power is supplied directly into the Serial Bus Cables a fuse should
be used to protect the Bus System from short cuts.
Users Manual IRTrans Version 2.12
8
2.2. USB Version
Before connecting the Device to the PC the Driver CD should be
inserted into the CD Drive.
A USB A-B Cable is used to connect the USB Device to the PC or a USB
Hub. After connecting the PC detects the Device and starts the Driver
installation. The USB Version is always powered by the PC. However, an
external Power Supply might also be connected.
2.3. RS232 Version (with DSUB 9 Connector)
To connect the RS232 version to the PC a simple pass-through RS232
cable is needed. (No Null-Modem!) Baud rate and parameters are set
automatically. To supply power to the IRTrans unit you need a complete
RS232 cable. If an external power supply is used, only GND / RxD / TxD
are needed.
Most PCs deliver enough power using the status lines of the RS232 port
to power the IRTrans even while sending. If you discover problems
sending codes you need to connect an external power supply.
This power supply needs to deliver 8-16V= with about 250mA. The
positive pole has to be connected to the inner contact of the power
connector (as usual). If codes are only received, the power delivered by
the PC should always be enough to power the IRTrans.
2.4. RS232 Version (new Versions with Western Plugs)
The new serial IRTrans Versions use a 6pin Western Connector to
connect the IRTrans to the PC. This cable has to be configured as
follows:
Signal
Pin No. (PC DSUB 9)
Pin No. IRTrans
GND
5
5
RTS
7
4
DTR
4
6
RxD
2
1
TxD
3
3
Of course a suitable cable may be ordered.
