Matrix Orbital LK202-25 Legacy - Manual (Page 10)

Table 2: Connectors and Functions
Connector Function
12 pin dual header General purpose outputs
(6)
4 pin Power (5.0 VDC), Data
(Rx,Tx), I 2 C communica-
tions and Ground
10 pin header Keypad and ground strap-
ping
DB-9F RS-232 / power
2.1.1 Power Connections
Power is applied via pin1 and ground via pin 4 as shown in the figure below. Power requirement is +5
VDC ±0.25V. As an alternate power connection, power may also be supplied via the RS-232 connector as
described in section2.1.4
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 connec-
tor.
• Do not apply more than +5Vdc to pin #9 on the DB-9 connector.
Power connector pinout is as follows:
1 2 3 4 1 2 3 4
Figure 3: Power Connector
Matrix Orbital LK202-25 6