Auxiliary Inputs/Outputs; Auxiliary Input/Output (I/O) Board; Relays - HindlePower ATevo Series Operating/Service Instructions Manual

12.1 Auxiliary Input/Output (I/O) Board

The Auxiliary I/O Board (A4) is an optional component that mounts
near the top of the heat sink on the ATevo left side. It is equipped
with six (6) relays, four (4) generic Binary Inputs, and four (4) generic
Analog Inputs.
The Auxiliary I/O Board (A4) communicates to the Main Control
Board (A1) via serial communications. The Serial Communications
Connection is part of the ribbon cable between the Main Control
Board and the Power Board (A2). A green communications LED is
located adjacent to the Auxiliary I/O Board terminal block (A4-TB2).
This LED will blink to indicate active communication between the
Auxiliary I/O Board and the Main Control Board.
All relays are failsafe such that if communication is lost between the
Main Control Board (A1) and the Auxiliary I/O Board (A4), the relays
will switch to the alarm state.

12.1.1 Relays

The Auxiliary I/O Board (A4) contains six (6) configurable one (1)
form-C relays. Relay contacts are rated for 0.5A @ 125 Vac/Vdc.
Each relay has:
• a red LED that serves as a debugging aid that illuminates when
the relay is in alarmed state
• a second contact set which feeds back the relay's state to
ATevo's main processor

12 Auxiliary Inputs/Outputs

ATevo
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