UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


System I/O PWA (Flywheel Cabinet)

Usage:

UPS 250 APZ

Description



Illustration 1g01277130
(1) System Input/Output Board

The System Input/Output Board provides an isolation barrier between the following components that are used by the cabinet:

  • the controller

  • the communication ports

All communication to the System Input/Output Board and the MMU cabinet are routed to the System cabinet.

Customer connections for the SMS system are the following connections:

  • Remote Input Contacts

  • Remote Output Contacts

Internal connections for the SMS system are the following connections:

  • Ethernet

  • RS-232/RS-485

  • Modem

  • Primary UPS Net

  • CAN

The System Input/Output Board will work with a normally open Remote Emergency Power Off (REPO) system or a normally closed REPO system. If no REPO is connected or the normally open circuit is used, a jumper must be installed on the normally closed circuit.

Removal Procedure

Refer to Systems Operation, Testing and Adjusting, RENR9988, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.


NOTICE

Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in a 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.




    Illustration 2g01277236
    Diagram of the System Input/Output Board

  1. Perform Step 1 in single module systems only. Refer to Illustration 2.

    1. Disconnect the "J14" remote input contact. Label the connector for subsequent installation.

      Note: In older hardware, disconnect the "J7" remote input contact.

    2. Disconnect the "J6" remote output contact. Label the connector for subsequent installation.

    3. Disconnect the remote emergency power off "J7". Label the connector for subsequent installation.

  2. Disconnect the remaining connectors. Verify each label for each connector for subsequent installation.

  3. Remove the ground screw from the "J11" connection point.

  4. Disconnect the white plastic standoffs that connect the board (1) to the left panel.

    Note: The System Input/Output Board (1) must be removed from the standoffs without bending the board.

  5. Compress the head of each standoff so that the board (1) is not locked, but the board is still attached to the standoff.

  6. Remove the board (1) from all standoffs at the same time.

  7. Remove the System I/O Daughter Card. Refer to Systems Operation, Testing and Adjusting, RENR9988, "System I/O Daughter PWA (Flywheel Cabinet)" for removal instructions.

Installation Procedure


NOTICE

Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in a 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.


  1. Install the System I/O Daughter Card. Refer to Systems Operation, Testing and Adjusting, RENR9988, "System I/O Daughter PWA (Flywheel Cabinet)" for installation instructions.

  2. Position the board (1) in the cabinet over the white standoffs that are connected to the left panel. Install the board (1). Verify that all the standoffs are locked into the correct position.

  3. Install the ground screw on the left panel.

  4. Connect the wire connectors. Verify the labeling of each connector for proper placement. Refer to Illustration 2.

Table 1
Fuse  Type 
SIO-F1  250 VAC 3.15 A 
SIO-F2  250 VAC 2 A 
SIO-F3  250 VAC 2 A 
SIO-F4  250 VAC 2 A 
SIO-F5  250 VAC 1.6 A 
SIO-F6  250VAC 2 A 

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