ZyXEL Communications BPS-120 Manual

BPS-120

Support Notes

Version 1.00.01

Nov 2004

VSG-1200 Support Notes

INDEX

Application Note...........................................................................................................3

What kinds of the scenarios the BPS connect?......................................................3

How does the BPS work? ......................................................................................3

How to install the BPS? .........................................................................................4

What is the power connector definition? ...............................................................4

BPS-120 FAQ................................................................................................................4

What is persist time of BPS? .................................................................................4

When the BPS works? ...........................................................................................5

When does the BPS turn off the power after BPS provides the power to device? 5

How many backup power supply control status? ..................................................5

What is the max 12V power output when BPS provides power to unit?...............5

VSG-1200 Support Notes

Application Note.

What kinds of the scenarios the BPS connect?

The one-to-many scenario is shown the following.

Redundancy Power Cable

GS-3012F

GS-3012

BPS-120

Redundancy Power Cable

GS-3012F

GS-3012

BPS-120

The one-to-one scenario is shown the following

Redundant

ower cable

The one-to-one scenario of backup power function is guaranteed. Because when one

device power fails, the BPS can support this device immediately. In one-to-many

scenario, the BPS cannot support the two fail devices at the same time. The backup

power function is not guaranteed.

How does the BPS work?

The ZyXEL BPS-120 is designed to connect up to 6 external networking devices.

When one of the internal devices powers down, the BPS turns on the power quickly

and avoid the system reboot.

VSG-1200 Support Notes

How to install the BPS?

The installation way BPS is very easy. You just use the “Redundant power cable” plug

the ZyXEL Management Switches which support backup power between BPS. Then

power on the BPS. The backup power environment is finished.

What is the power connector definition?

The connector type is shown below

Pin Number Designation

1 GND

2 N/A

3 12V

4 12V

5 12V

6 12V

7 GND

8 GND

9 N/A

10 BPS_PRES (BPS present)

11 BPS_CTRL_0

12 BPS_CTRL 1

13 PWR_GOOD (Power is good)

14 GND

BPS-120 FAQ.

What is persist time of BPS?

The persist time is 60 ns.

VSG-1200 Support Notes

When the BPS works?

When the device power is lower then 10V, the BPS start to provide external power to

device.

When does the BPS turn off the power after BPS provides the

power to device?

1. Remote device disconnected from BPS port.

2. Over temperature around the per-port MOSFET. When the temperature goes down,

the BPS may turn on the power to the device again.

3. Remote device power plug-in.

4. BPS output voltage drops to below 10 volts for more than 40ms.

How many backup power supply control status?

There are four status for the BSP.

1. BPS inactive, power off.

2. BPS active, not providing power to the unit.

3. BPS active, providing power to the unit.

4. BPS active, power not available to the port.

What is the max 12V power output when BPS provides power

to unit?

The max power is 120 Watt.

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