Matrix-orbital VFD2041 Legacy Manual do Utilizador descarregar pdf (Página 9)

2.1.4 Applying Power through the DB-9 Connector

Power may be provided to the module by pin 9 of the DB-9 connector instead of through the 4-pin SIP.

If power is to be applied using the DB-9, it must be a regulated 5Vdc supply.

NOTE This applies to wide voltage units (V and VPT extensions) as well as to standard

5volt units.

Figure 8: DB-9 Power

To use pin 9 as the power source, the user must solder the 5 volt jumper pad beside the DB-9 connector.

WARNINGS

• Do not apply power to both pin 9 AND the 4 pin SIP header.

WARNING Application of a voltage to pin 9 greater than 5.25 volts

will cause immediate destruction of unit and result in a void Manufac-

turer’s Warranty.

2.2 RS-232 Communications

The RS-232 connector on the PC cable is wired so that a standard ’straight through’ 9 pin D-sub cable

may be used to connect the module to a standard serial port such as COM ports on PCs. Note that this device

complies with the EIA232 standard in that it uses signal levels from ± 12V to ± 12V and can be converted

to TTL levels as well. The display is set at 19.2Kbps default speed. Other settings are;

8 bits, no parity, 1 stop bit.

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Matrix-orbital VFD2041 Legacy Manual do Utilizador Página 9