FSP PDU and Maintenance Bypass Switch Module
Specifications
- Model: Bypass Switch Module V. 2.0
- Usage: External power distribution unit for UPS systems or voltage regulators
- Mounting: Rack or Wall Mountable
- Input Power: Mains power cord
- Output Receptacles: Master for computer, Slave for peripherals
- Functionality: Maintenance bypass, Power distribution, Power saving
Introduction
The product is used as an external power distribution unit in conjunction with UPS systems or large-scale voltage regulators. It allows to manually transfer of the connected equipment to utility power via a bypass switch, permitting scheduled maintenance or UPS replacement without power interruption. Combined power distribution feature and the master-controlled design, it provides a maintenance bypass function and power saving within a rack mechanism.
Rack Mount/Wall Mount the Unit
The module can be mounted to a 19” enclosure or wall. Please follow chart below for rack/wall mount installation.
Product Overview 
- Master output receptacle (for connecting a computer)
- Slave output receptacles (for connecting peripherals)
- Socket to UPS output
- Socket to UPS input
- Bypass switch
- AC input
- Circuit breaker
- Master/Slave function switch
- Power LED
- Slave On LED
Installation and Operation
Inspection
Remove the unit from the shipping package and inspect it for damage that may have occurred during transportation. Notify the carrier and place of purchase if any damage is found. The shipping package contains:
- Maintenance bypass switch module x 1
- Quick guide x 1
- Mains power cord x 1
- Screws and mounting ears
Connect to the Wall Outlet
Plug the input power cord of the unit to the wall outlet. The Power LED will light up when the mains is normal. The Power LED will be off while power failure. 
Connect UPS
Connect a power cord from UPS input to UPS input socket on the unit. Use one power cord to connect UPS output to UPS output socket on the unit. 
Connect Equipment
There are two types of output receptacles: Master and Slave. To save power consumption, the unit is equipped with Master and Slave output receptacles. The Master output receptacle will sense if the master device (computer) is on. If the master device is no longer drawing current, it will automatically shut down the power to the Slave output receptacles. Please refer to the charts below for detailed equipment connections.
NOTE: When the computer is turned off, the Master output receptacle shuts off power to the slave output receptacles. However, when the computer goes into “sleep mode” or the power consumption of connected device to Master output receptacle is below 20 W, the Master output receptacle may not properly recognize the reduced power level.
Operation
Transfer to Maintenance Bypass
Before transferring to maintenance bypass, make sure the Power LED is lighting. Transfer the rotary bypass switch from “Normal” to “Bypass”. At this time, all connected devices are powered by the utility power directly. You may turn off the UPS and disconnect two cables connecting to UPS. Then you may now service the UPS.
Transfer to UPS Protection
After maintenance service is done, make sure the UPS operation is normal. Then, reconnect UPS to the unit by following Installation Section. Verify the Power LED is lighting. Then transfer the rotary bypass switch from “Bypass” to “Normal”. Now, all connected devices are protected by UPS.
Master/Slave Function Operation
After connecting all devices to the unit, press “Master/Slave switch” to enable status (
). The Slave On LED will light up when connecting load on master output is above 20W. Press “Master/Slave switch” to disable status (), the function is disabled and the Slave On LED will be on.
Status & Indicator Table
Important Safety Warning (SAVE THESE INSTRUCTIONS)
- To safely operate this unit, please read and follow all instructions carefully.
- Read this manual thoroughly before attempting to unpack, install, or operate.
- You may keep this quick guide for further reference.
- CAUTION: The product must be used indoors only.
- CAUTION: Do not place the unit near liquid or in an excessively damp environment.
- CAUTION: Do not place the product directly in the sun or near a hot source.
- CAUTION: Do not let liquid or foreign objects enter the product.
- CAUTION: Ground the product using a 2P + ground sockets.
- CAUTION: When installing the product, ensure that the sum of the leakage currents of the product and the devices it supplies not exceed 3.5mA.
Product Usage Instructions
Installation and Operation Inspection
Remove the unit from the shipping package and inspect for any damage. Contact the carrier if damage is found.
Rack Mount/Wall Mount the Unit
The module can be mounted to a 19″ enclosure or wall. Follow the provided instructions for installation.
Connect to the Wall Outlet
Plug the input power cord into the wall outlet. Power LED indicates normal mains power.
Connect UPS
Connect UPS input/output cords to the corresponding sockets on the unit.
Operation Transfer to Maintenance Bypass
Ensure the Power LED is lit, switch the bypass switch from Normal to Bypass for the utility power supply.
Connect Equipment
Connect devices to the Master and Slave output receptacles based on power consumption requirements.
Transfer to UPS Protection
After maintenance, reconnect UPS to the unit and switch the bypass from Bypass to Normal for UPS protection.
Master/Slave Function Operation
Enable/disable the Master/Slave function switch based on load requirements. Slave LED indicates load status.
Frequently Asked Questions
Q: How do I know if the unit is receiving power? A: The Power LED will indicate normal mains power by lighting up. Q: Can I mount the unit on a wall? A: Yes, the unit can be wall-mounted using the provided instructions. Q: What is the purpose of the Master/Slave function? A: The Master/Slave function helps in power saving by controlling power to peripherals based on the main device status.
The Power LED will indicate normal mains power by lighting up.
Can I mount the unit on a wall?
Yes, the unit can be wall-mounted using the provided instructions.
What is the purpose of the Master/Slave function?
The Master/Slave function helps in power saving by controlling power to peripherals based on the main device status.
Documents / Resources
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FSP PDU and Maintenance Bypass Switch Module [pdf] User Guide PDU and Maintenance Bypass Switch Module, Maintenance Bypass Switch Module, Bypass Switch Module, Switch Module, Module |