Installation guide

Installation
890USE17100 September 2003 43
Creating a
Keying Scheme
There are a multitude of keying schemes you can use in you Advantys STB island.
Here are some strategies to keep in mind when designing your scheme
.When keying module connectors:
key the top and bottom connections differently
key adjacent modules differently
When keying the module to base connections:
key adjacent modules differently
The following is a suggested keying scheme for base to module connections. We
use the six keying combinations that are unique, meaning a module with a different
keying profile will not fit into the uniquely keyed base. However, you can design your
keying scheme with more than the six keying combinations. Verify your keying
scheme prior to starting up your system.
We are going to key all the base/module combinations on our island. We have
decided to use the six unique keying patterns(#1 to #6) and one non unique pattern
(#7). The illustration below points out the key slots (which will be left open or keyed)
and the break-off pins (which will be left alone or removed).
Base Module
Key slotsBreak-off pins