Matrix Orbital GLK24064-25 Legacy - Manual (Page 9)

To lock down the memory chip, solder the jumper in the ’red box’ and cut the trace where the red ’X’
is. This will lock down the memory chip, preventing anything from being changed inside it until the track is
restored and the solder jumper is removed.
2 Connections
2.1 Power
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
• Do not use any cables other than the cables supplied by Matrix
Orbital, unless aware of the modifications required.
• Do not apply voltage to the DB-9 connector AND power connector
• Do not apply more then +5Vdc to pin #9 on the DB-9 connector.
Refer to the Figure below for this chapter.
Figure 3: Electrical Connections
Table 1: Connectors and Functions
Connector Function
10 pin header Keypad header, 5x5 matrix
4 pin Power (Vdc) and I 2 C communica-
tions or RS-232
DB-9F RS-232/power
2 pin header GPO header
3x2 header I 2 C and RS-232 select
Matrix Orbital GLK24064-25 5