Matrix-orbital PK202-25 Manual do Utilizador descarregar pdf (Página 10)

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 conncetion, power may also be supplied via the RS-232 connector as

described in section 2.1.4.

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 connector

• Do not apply more than +5Vdc to pin 9 on the DB-9 connector.

Connector pinout is as follows:

1 23 4 12 34

Figure 3: Power Connector

Table 3: Connector Pinout

Pin 1 +5.0 VDC (+7 to +15 VDC with wide voltage option)

Pin 2 SCL (I

C clock), Rx

Pin 3 SDA (I

C data), Tx

Pin 4 Ground

2.1.2 Five Volt Modules

If the display is used in a PC it becomes tempting to plug a spare power connector into the unit. Don’t

do this! Wiring for the PC power connector and that required for the display are different as shown in the

Figure below.

Matrix Orbital PK202-25 6

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Matrix-orbital PK202-25 Manual do Utilizador Página 10