Replacing Auxiliary I/O Board (A4) - HindlePower ATevo Series Operating/Service Instructions Manual

14 Maintenance
14.3.8 Replacing Auxiliary I/O Board
Preparation:
• Shut down and lock out all power to ATevo.
• Remove the safety shield.
• Disconnect the battery and dc load(s) from the DC Output
Circuit Breaker (CB2+/-).
• Check with a voltmeter before proceeding
! WARNING
TB4), Binary Inputs (A4-TB1), and Analog Inputs (A4-TB3) may still
have wetting voltages or signal voltages present.
Removal of Existing Auxiliary I/O Board:
• The Analog Inputs terminals (A4-TB3) and Binary Inputs
terminals (A4-TB1) are removable. If any wires are present on
these terminals, pull the terminal blocks out of their sockets.
• Remove wires connected to the Relay terminal block (A4-TB4).
• Remove (4) screws that connect Auxiliary I/O Board (A2) to the
Heat Sink Assembly (A6).
• Remove Auxiliary I/O Board (A4) from the Rectifier / Heat Sink
Assembly (A6) by pulling it forward, toward front of ATevo.
Installation of New Auxiliary I/O Board:
• Align header socket at top right of Auxiliary I/O Board (A4) with
header pins on Power Board (A2).
• Push Auxiliary I/O Board onto header pins of Power Board and
align (4) mounting holes with standoffs on Heat Sink Assembly.
• Install (4) mounting screws through board and into standoffs.
• Replace safety shield, close front panel door, and restart ATevo.
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Wires connected to the Relay Outputs (A4-
ATevo