Matrix-orbital LCD2041 Legacy Manuale Utente Scaricare il pdf (Pagina 10)

LCD2041 rev 2

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 ± 3V to ± 12V. It will not operate

correctly at TTL (0 to +5V) levels.

Pin Number Direction Description LCD Host

2 Data from LCD Data out (LCD) Tx Rx

3 Data to LCD Data in (LCD) Rx Tx

5 - Ground gnd gnd

2.2.2 Applying Power via the RS-232 Connector

The power connector on the PC cable is wired as shown in Figure 2-7. Power may be provided to the

module by pin 9 of the DB9 connector instead of through the 4-pin SIP. If power is to be applied using the

DB9, it must be a regulated 5Vdc supply. Note: This applies to wide voltage units (V and VPT

extensions) as well as to standard 5 volt units.

To use pin 9 as the power source, the user must solder the 5 volt jumper pad beside the DB9 connector. If

you have any further questions or concerns don’t hesitate to contact Matrix Orbital at support@matrix-

orbital.com.

Warning: Use this method of power up at your own risk. Application of a voltage to pin 9 greater

than 5.5 volts will cause immediate destruction of unit and void the warranty.

2.2.3 Configuring RS-232 and I

RS-232 baud rate and I

C address are configured by means of jumpers (see ).

Figure 2-8 RS-232 jumpers

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 29 30

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Matrix-orbital LCD2041 Legacy Manuale Utente Pagina 10