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| Illustration 1 | g01277292 |
Controls Cabinet Left Panel (17) Breaker and Contactor Status Board (18) Remote EPO Terminal Block (19) T8 Modem Power Transformer (20) T6 Transformer (21) General Purpose Interface Board (22) Fan Power Fuse Block (23) Fuses F29-F32 (24) Fuses F20-F22 (25) Fuses F25-F28 (26) EPO Reset (27) Neutral Distribution Terminal (28) K1 Motor Power Relay (K9) | |
The Breaker and Contactor Status Board is located in the Controls cabinet (CC) at the top of the left panel.
The Breaker and Contactor Status Board has the primary function of controlling most breakers and contactors in the UPS 1200 System. In addition, the status of all the breakers and contactors are monitored by the Breaker and Contactor Status Board.
The Breaker and Contactor Status Board receives commands from the APC2 over the Multidrop network as to which device to operate and then relays the status of that device back to the APC2.
If the Breaker and Contactor Status Board loses communication with the APC2, the Breaker and Contactor Status Board initiates a safe and controlled transfer to bypass and open the K3 and K4 contactors.
Another function of the Breaker and Contactor Status Board is Local EPO and Remote EPO control. The local, normally open EPO, input is combined with both the normally open and normally closed remote EPO signals to perform the total system EPO function. If any one of these three inputs is activated, a signal is sent out of this board to the EPO switch to remove 230VAC control power to all contactors and breakers as well as issue a shunt trip command to the input breakers thereby isolating the UPS system.
Multidrop Bus
The Breaker and Contactor Status Board provides serial data over the Series 1200 Multidrop Bus. The Breaker and Contactor Status Board functions as a slave on this bus, receiving commands from the APC-2 and responding with status information.
The Breaker and Contactor Status Board has a jumper-selectable 100 Ohm terminating resistor for the Multidrop bus. Jumper "JMP1" provides terminal resistance. There is also a switch that sets the Node ID. Set the Breaker and Contactor Status Board Node ID and terminating resistor jumper to the settings in Table 1.
| BCS Settings | |
|---|---|
| Node ID | 3 |
| Terminating Resistor | JMP1 - Never installed |
Refer to Systems Operation, Testing and Adjusting, RENR7654, "Multidrop Network - Setup" for information on setting up the Multidrop Network.
Fuses
The type and the function of the fuses are indicated in Table 2. Visually inspect the fuses and replace if the fuse is blown.
| Breaker and Contactor Status Board Fuses | |
|---|---|
| Fuse | Type |
| BCS-F2 | 250VAC 5A Time Lag |
| BCS-F3 | 250VAC 5A Time Lag |
| BCS-F4 | 250VAC 5A Time Lag |
| BCS-F5 | 250VAC 5A Time Lag |
| BCS-F6 | 250VAC 5A Time Lag |
| BCS-F7 | 250VAC 5A Time Lag |
| BCS-F8 | 250VAC 5A Time Lag |
| BCS-F9 | 250VAC 5A Fast |
| BCS-F10 | 250VAC 5A Fast |
| BCS-F11 | 250VAC 5A Time Lag |
| BCS-F12 | 250VAC 5A Time Lag |
Breaker and Contactor Status Board Diagram - Version 1 Hardware
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| Illustration 2 | g01277586 |
Breaker and Contactor Status Board - Version 1 (BCS1) | |
Breaker and Contactor Status Board Diagram - Version 2 Hardware
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| Illustration 3 | g01277587 |
Breaker and Contactor Status Board - Version 2 (BCS2) | |
LED Indicators
| Breaker and Contactor Status Board LED Indicators | ||
|---|---|---|
| LED | Board Designation | Purpose |
| 1 | D1 | K1 Status |
| 2 | D2 | Bypass SS Status |
| 3 | D3 | K3 Status |
| 4 | D4 | K4 Status |
| Datalock | D5 | Datalock with APC |
| D24 | K3 Command | |
| D25 | K4 Command | |
| D26 | K6 Command | |
| D27 | K7 Command | |
| D28 | K1 Close Command (1) | |
| D29 | Not Used | |
| ( 1 ) | Cycles until closed. |
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 locations in the unit are labeled. Verify each connector to make sure that the label is present and legible.
Refer to Illustration 2.
| NOTICE |
|---|
Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in the 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. |
- Fasten the cross tip screw that is located at the bottom right of the board.
- Disconnect the seven white plastic stand-offs 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
| NOTICE |
|---|
Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. When not in use, keep the module in the 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. |
- Position the board in the cabinet over the seven white stand-offs that are connected to the left panel.
- Push the board, gently and evenly, onto all the stand-offs simultaneously. Make sure all stand-offs are locked in place.
- Screw the cross tip screw into the bottom right of the board in the hole labeled "J2".
- Plug the wire connectors into the correct connectors on the board. Check the labels on each connector for proper placement.
Refer to Figure 2.