Matrix Orbital GLK240128-25 Legacy - Manual (Page 11)

1 DB-9 Connector 4 Keypad Interface Connector
2 Power Through DB9 Jumper 5 Power / Data Connector
3 Manual Override 6 File System Lock Jumper
Figure 11: GLK240128-25
2.1 DB-9 Connector
The GLK240128-25 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.
Matrix Orbital GLK240128-25 6