STABILIZER GP-BACKHOE 9R0041 - Caterpillar

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(1) APC3 Board Location - Front Cabinet ViewAPC3 Board
Description
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PWA APC3 board
The APC controller is the main control for the system. All the control signals for the inverters, field coil drivers, and the static switch originate from the controller. All the status and the telemetry signals in the system are sent to the APC controller for monitoring. The APC is located behind the right door panel on the SIO cabinet. The APC PWA serves the following functions:
The APC controller provides computational resources to allow system control of the processor, FPGA, DSP, and related memory and configuration devices.
The APC controller receives, scales, and processes analog telemetry information from the system being controlled.
The APC controller provides data channels to receive information from and send information to satellite boards in the system.
The APC controller stores calibration and configuration data.
The APC controller tracks the date and time.Service Port - J29
This RJ45 port is an Ethernet connection point for connecting a single computer directly to the APC3 for monitoring and configuring with UPSView. The port is physically routed to the top of the cabinet so that a connection can be made without opening a door. It has a fixed IP address of 198.18.0.1. The port for UPSView is 44500.Note: The computer will need to be temporarily configured with a fixed IP address to communicate to the service port of the APC.Battery
The battery (B1) on the APC must be replaced every 5 years. The battery is a CR2032 Lithium.
Table 1
APC3 Battery Specifications
Description Specification
Nominal Voltage 3.0V
Typical Voltage 3.1V - 3.3V
Rated Capacity 200 mAh on 15 kΩ to 2.0 V at 21° C (70° F)
Operating Temperature Range −40° C (−40° F) to 60° C (140° F) Changing the APC3 Battery
Note: When replacing the battery, replace with the same number and type as installed.Note: Dispose of the battery properly. The battery may explode if exposed to flame.Use the following procedure to remove and replace the APC3 battery:
Remove power from the system.
Open the appropriate cabinet door.
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Gently remove the coin battery from the receptacle. Removal is done by pressing the battery against the center retaining tab and lifting.Note: Be sure to wear a static discharge wrist strap while removing the coin battery.
Replace the battery with the same type and number as installed.
Close the cabinet door.
Return power to the system.
Reset the system clock.LED Indicators
Table 2
APC3 LED Indicators
LED Board Designation Purpose
0,1,2 D0, D1, D2 Binary 8 count - OK
7 D7 Heartbeat APC3 Removal
Refer to Systems Operation, Test and Adjust, UENR4695, "Internal Component Pre-Removal Steps". Perform the internal component pre-removal procedure to shut down the system and to gain access to internal components.The SIO cabinet must be de-energized before removal steps can be performed.
Disconnect all connectors from the board. The connectors are labeled to match the appropriate location in the unit. Verify each connector to make sure that the label is present and legible.
Disconnect the nine white plastic standoffs connecting the board to the panel using the following method.The board must be removed from the standoffs without bending the