MCI_111_A_RevB.doc
Page: 8 of 18
P/N 00355-124/0000 2011-12-01
3.4.3
RS232 Host Connection
Installation must be executed when the computer is switched off.
Insert the 9-pin D-Sub female connector (
Fig. 7
) into a free serial port
on your PC (COM x).
3.4.4 External
Power
Supply (optional)
Many computers, especially latest models, do not supply enough current on the PS2 ports to drive
our keyboard with all included modules at the specified voltage of 5V +/-5%. Therefore we
recommended using our optional external power supply for PS2/RS232 (I1) models.
Connect the appropriate PrehKeyTec power supply to the jack of above RS232 connector.
ATTENTION: Polarity is different to standard power supplies!
Only
connect the appropriate PrehKeyTec power supply P/N 05198-048/0000
Notes:
•
Please secure the connector plug against unwanted removal by means of a cable tie.
•
To prevent damage, the jack automatically cuts off the Vcc line between keyboard and PC.
•
The ML 2 A RS232 model (product code "I3") is
only
operable with external power supply.
Here the power supply is included in the delivery.
Fig. 7
RS232
Connector
