User manual

AVMFlex-SA Series User Manual P/N 821624 Rev-A

Tally Control Connector Wiring

A front panel dual-color Tally Indication LED is associated with each LCD display module. Interface is provided to the LEDs via

the Tally Control Connector located on the chassis rear panel. The Tally Indicator LEDs are capable of displaying three colors;

RED, GREEN, and AMBER. Illuminating the RED or GREEN LEDs separately will result in that tally color. Illuminate the RED and

GREEN LEDs simultaneously to achieve a AMBER tally indication in the LED. For Tally Control Connector pinout functions, see

the diagram below.

Three examples of tally connection configurations are shown on the next page. You can operate the Tally Indication LEDs by

numerous methods. The three tutorial examples showing dry closure, positive true logic drive, and open collector activation are

illustrated to show basic operation. The LEDs interface with TTL levels. You can design illumination circuits as shown, by using

TTL buffers, or by using transistors as switches.

Note that since the AVMFlex-SA Series units feature only a single LCD display (and Tally LED), only the first tally channel is

utilized in the pinout diagram below and in the wiring examples on the next page.

Tally Connector Pin Functions

Section 3: Technical Information

Not connected for

AVMFlex-SA

Series units