4 general purpose output – Matrix Orbital VFD2041 Legacy User Manual

Page 14

/ write bit. If we take a standard Phillips 7bit address of 45hex this would be in binary 1000101. This is

7bits. Matrix Orbital would describe the Phillips I

C address of 45hex as 8Ahex. The read address would

be 8Bhex.

For more information on Phillips I

C please visit;

¢¡£¡¥¤§¦©¨£¨£§¤¢ !¢"¢¨¢#$¤¢£%£&£')(0¨12¢34¢5761¨12¢3¢$£8¢"79@A ¢¡B

To communicate by I

C two jumpers have to be set into the I

C position above the DB-9 connector.

Figure 14: I

Connector pinout is as follows;

Figure 15: Connector Pinout

Table 6: Connector Pinout

Pin 4

Ground

Pin 3

SDA (I

C data)

Pin 2

SCL (I

C clock)

Pin 1

Vdc

2.4 General Purpose Output

The display has a general purpose output which can be used to control relays or other electronic devices.

This allows external devices to be turned on or off using your PC or controller and software commands. The

+ terminal is connected to the module positive supply, the - terminal is connected through a 240 ohm current

limiting resistor and the electronic switch to ground.

Matrix Orbital

VFD2041