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2 Hardware Information
Refer to the following diagram for this chapter:
1 DB-9 Connector 6 Legacy Connector Jumper
2 Power Through DB9 Jumper 7 Protocol Select Jumpers
3 Manual Override 8 File System Lock Jumper
4 Keypad Interface Connector
5 Power / Data Connector
Figure 11: GLK24064-25
2.1 DB-9 Connector
The GLK24064-25 provides a DB-9 Connector to readily interface with serial devices which use the
EIA232 standard signal levels of ±12V to ±12V. It is also possible to communicate at TTL levels of 0 to
+5V by setting the Protocol Select Jumpers to TTL. As an added feature it is also possible to apply power
through pin 9 of the DB-9 Connector in order to reduce cable clutter. However, in order to accomplish this
you must set the Power Through DB-9 Jumper.
Pin 2 Rx \ SCL (I
2
C clock)
Pin 3 Tx \ SDA (I
2
C data)
Pin 5 GND
Pin 9 PWR (Must solder Power Through DB-
9 Jumper. See table 1 on page 10 for
power requirements.)
Figure 12: RS-232 Pin-out
Matrix Orbital GLK24064-25 8