The solution to the problem (thanks to Tom Suzda) is to unplug the UPS and while it is still chattering, press the power button (on the front of the unit) until the unit beeps and the chattering stops. After that the UPS should behave normally and power down 1-2 minutes after requested to do so.

An amazing discovery by slither man allows one to build a CUSTOM-RJ45 cable (documented above) and run the BackUPS CS (and probably also the ES) in Smart mode. Running it this way provides all the same information that you would get by running it in USB mode. As a consequence, we recommend that you either purchase (where I don’t know) or build your own CUSTOM-RJ45 cable rather than use the 940-0128A cable.

Thanks to all the people who have helped test this and have provided in- formation on the cable wiring, our best guess for the cable schematic is the following:

computer

 

 

---------

 

Inside the Connector---------

UPS

 

DB9-F

 

 

 

 

 

 

 

 

 

 

 

RJ45

pin - signal

 

 

 

 

 

 

 

Pin - Color

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

DSR

 

->

---

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

diode

resistor

 

 

 

 

6

 

 

DTR

 

->

---

+----

>----

/\/\/\

---o

 

kill power

8

Orange

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

DCD

 

<-

----

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

RxD

 

<-

----

+----------------

+--

o

low battery

3

Brown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

RTS

 

->

----------

+--

/\/\/\--

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+--

/\/\/\--

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

RI

 

 

<-

----

+----------------

+--

o

on battery

2

Black

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

CTS

 

<-

----

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signal

 

 

5

 

 

GND

 

--

-----------------------

 

 

o

 

ground

7

Red

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

TxD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

chassis

 

 

Chassis/GND

-----------------------

 

 

 

o

 

ground

4

Black

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not connected

 

 

1, 5, 6, 9, 10

 

 

 

 

 

 

--------------------------------------

 

 

 

The RJ45 pins are: looking at the end of the connector:

 

 

10

9

8

7

6

5

4

3

2

1

 

 

 

 

 

 

 

149

Page 149 Page 151
Page 150
Image 150
APC UPS control system manual Computer Inside the Connector
Page 149 Page 151

UPS control system specifications

APC UPS (Uninterruptible Power Supply) control systems are vital components for ensuring uninterrupted power supply and protecting critical equipment from power interruptions, surges, or fluctuations. Designed by Schneider Electric, APC UPS systems are renowned for their high quality and reliability. They utilize advanced technologies and features to suit diverse applications, from home offices to large industrial settings.

One of the main features of APC UPS systems is the ability to provide backup power during outages. This is achieved through a battery system that activates immediately when the mains power fails. This seamless transition minimizes downtime and ensures that electronic devices continue to operate, protecting data integrity and equipment lifespan.

Another significant characteristic of APC UPS systems is their intelligent management capabilities. Most models come with PowerChute software, which provides users with real-time monitoring of power conditions and the status of the UPS. This software allows for graceful shutdowns of connected devices during extended outages, thereby preventing data loss and damage to devices.

APC UPS systems also incorporate advanced technologies such as Automatic Voltage Regulation (AVR). AVR technology ensures that the output voltage remains stable by correcting minor fluctuations without switching to battery mode. This not only prolongs the battery life but also provides a consistent power supply to the connected equipment.

Thermal management is another critical aspect of APC UPS control systems. The design often includes efficient cooling systems that prevent overheating, ensuring optimal performance and longevity of the unit. Some models feature EcoMode, which reduces energy consumption and lowers operational costs by working at high efficiency only when battery backup is not required.

APC UPS systems are designed with scalability in mind. Users can easily add more batteries or connect additional UPS units to accommodate growing power needs. Features such as hot-swappable batteries and modular design facilitate easy upgrades and servicing without interrupting power supply.

In terms of connectivity, APC UPS products often feature multiple options including USB, RS-232, and network management capabilities. This enables users to connect remote management tools and integrate the UPS with existing IT infrastructure.

In summary, APC UPS control systems deliver reliability, efficiency, and advanced technology features that cater to a wide array of power protection needs, making them a trusted choice for individuals and businesses alike.
Top Page Image Contents