Installation guide

3. Expansion Bus LED

If lit, indicates that the Expansion Unit is properly connected to the HAL. If Expansion Units are properly

connected to one another and to the HAL port yet this status LED remains dark, there is likely a problem

with the connection between the HAL or last Expansions Unit in the chain where this LED is lit and the

first Expansion Unit in the chain where this LED remains dark.

4. Locate and Power LEDs

The Locate LED, which flashes when toggled from within the Halogen software, helps identify a specific

EXP — useful if you have more than one EXP installed. The Power LED lights when adequate power is

applied to the unit.

HAL SYSTEM DESIGN GUIDE