Q: What are the differences and similarities between the LT5 module that is included as part of the BDL168 package and the Block Monitor module that is included as part of the BD4 package?
A: These two devices are for all practical purposes interchangeable.
Similarities – They use the same electronic schematic.
Differences – They use different leds and different display configurations.
The LT5 that comes with BDL168 has 5 red LEDs, four on the top row, and one on the bottom row.
The Block Monitor that comes with BD4 has of 5 green LEDs in a single row.
Either module can be used with either block occupancy detector module.