Discrete Outputs DO 1-8 Green LED indicators light when respective relay output is "on".
Power &
Processor Activity		 ACT Green LED, normally flickering rapidly, flashes each time the MS/TP token is passed and each time a "poll for master" is sent.
PWR Green LED indicates power is present independent of any processor activity. This indicator is on the secondary side of the internal DC/DC converter. If power is present at the input terminals but this LED does not light, there is a hardware fault.
BACnet MS/TP TX Yellow LED flashes each time a packet is sent out on the MS/TP network.
RX Yellow LED flashes each time a packet is successfully received on the MS/TP network. This LED will not flash if unrecognized communication is received.
ERR Normal operation: Red LED flashes any time an error is detected in the received packet, such as unrecognized object.

Bootloader: Upon power-up, the bootloader checks the integrity of the application. If program memory has been corrupted in the co-processor, the red light will remain on with brief flickers off at a 1-second rate, and the green ACT LED will remain off.

The red LED will remain on for about 5 seconds at power up, a period referred to as INIT mode. During this time it is checking the integrity of the application, but it is also checking the communications link for either the "baccom" command or a firmware update start command.

Discrete HOA Switches The 8 HOA switches are 3-position switches which may override outputs by driving the relay coils (load is not directly switched). The lower position (A) puts the output in automatic mode under control of the processor. The middle position (O) forces the relay off, and the upper position (H) forces the relay on. The LED directly above the HOA switch indicates the state of that output.