BTEK T419S Service Manual page 71

Below is an example of an option card. The option cards connect to the main board or
can be stacked on top of another option card. Pins on the bottom of the option card
connect to the connector at terminal J4 on the main board. Stacked cards connect at
the terminal shown at the top of the photo in
noted by the arrows, hold the board in place. Standoffs are needed between stacked
cards.
T419S Indicator Service Manual
Figure
Connector pins on
bottom of the card.
Stackable cards plug
into this connector.
Figure 8.1 Option card example
8.1. Screws, at the four locations
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