Matrix Orbital LCD/VFD Legacy - Manual (Page 7)

2 Connections
2.1 Connector Pinout
Refer to the diagram below for this chapter.
Figure 3: Electrical Connections
The display has three connectors;
Table 2: Connectors & Functions
Connector Function
2 pin header General purpose output
4 Pin Power (Vdc) and I 2 C communications
DB-9F RS-232 / Power
2.1.1 Power and I 2 C Connections
Power is applied via pins 1 and 4 as shown in the Figure above. Power requirement is +5 VDC ±0.25V.
Power may also be supplied via the RS-232 connector as described in the next section.
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 power to the DB-9 connector AND the 4 pin power
connector.
• Do not apply more than +5Vdc to pin #9 of the DB-9 connector.
Matrix Orbital LCD4041 4