- AC Input Voltages
- AC Output Voltages
- AC Input Currents
- AC Output Currents
- DC Bus Voltages
Each of the channels is digitally sampled. The resulting data is sent serially to the APC2. The High Voltage Interface Board also receives a serial data stream from the APC2.
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| Illustration 1 | g01277298 |
Controls Cabinet Right Panel (41) CSNET Dual Network Interface Board (42) Wire Terminal Block (43) UPSNET Dual Network Interface Board (Optional) (44) APC2 Control Interface Board (45) Secondary Current Transformers (46) High Voltage Interface Board | |
Removal
- Perform steps in the Systems Operation, Testing and Adjusting, "Internal Component Preremoval Steps (Controls Cabinet)" in order to de-energize the system and gain access to internal components.
- Disconnect all connectors from the board. The connectors are labeled as to their locations in the unit. Verify each connector to make sure that the label is present and legible.
Refer to Illustration 2.
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| Illustration 2 | g01278433 |
High Voltage Interface Board | |
| NOTICE |
|---|
Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in its static-shield bag. Follow these guidelines when you handle any module: Touch a grounded object to discharge static potential. Wear an approved wrist-strap grounding device. Do not touch the bus connector or connector pins. Do not touch circuit components inside the module. If available, use a static-safe work station. |
- Disconnect all connectors from the board. The connectors are labeled as to their locations in the unit. Verify each connector to make sure that the label is present and legible.
Refer to Illustration 2.
- Remove the cross head screw (ground) from the top of the High Voltage Interface Board. The screw is labeled "J12".
- Disconnect the eight white plastic standoffs connecting the board to the left panel using the following method.
Note: The board must be removed from the stand-offs without bending the board.
- Pinch the head of each stand-off so that the board is not locked to the stand-off but is still attached to the stand-off.
- Remove the board by gently and evenly pulling the board from all stand-offs at the same time.
Installation
- Position the board in the cabinet over the eight white stand-offs that are connected to the left panel.
| NOTICE |
|---|
Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in its static-shield bag. Follow these guidelines when you handle any module: Touch a grounded object to discharge static potential. Wear an approved wrist-strap grounding device. Do not touch the bus connector or connector pins. Do not touch circuit components inside the module. If available, use a static-safe work station. |
- Push the board, gently and evenly, onto all the stand-offs simultaneously. Make sure all stand-offs are locked in place.
- Attach the cross head screw (ground) to the top of the board in the hole labeled "J12".
- Plug the wire connectors into the correct connectors on the board. Check labels for proper placement. Refer to Illustration 2.
- Perform the procedures that are listed in "Calibrations".
Calibrations
The following calibrations must be performed whenever the High Voltage Interface Board is replaced:
- Systems Operation, Testing and Adjusting, RENR7654, "DC Bus Voltage - Calibrate"
- Systems Operation, Testing and Adjusting, RENR7654, "AC Voltage - Calibrate"
- Systems Operation, Testing and Adjusting, RENR7654, "In Current - Calibrate"
- Systems Operation, Testing and Adjusting, RENR7654, "AC Output Current - Calibrate"