COMMUNICATIONS

COMMUNICATIONS INTERFACE PORT

The UPStation GXT 2U UPS has a standard DB-9 serial port female con- nector located on the rear of the UPS unit. Several signals are provided on this port and are assigned as follows:

Pin

 

 

 

Assignment Description

 

 

 

 

 

 

 

 

 

 

 

1

 

Low Battery (open collector)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

UPS TxD (typical RS-232 levels)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

UPS RxD (typical RS-232 levels)

 

 

 

 

 

 

 

 

 

4

 

Remote Shutdown (5-12VDC, 10-24 mA max); battery operation

 

 

 

 

 

 

 

 

 

 

 

5

 

Common

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

Remote Shutdown (short to pin 5); all modes of operation

 

 

 

 

 

 

 

 

 

 

 

7

 

Low Battery (open emitter)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

Utility Fail (open emitter)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

Utility Fail (open collector)

 

 

 

 

 

 

 

 

 

 

 

 

Pin Assignment

 

 

Collector to Emitter*

 

 

 

 

 

 

 

 

 

 

 

6

7

8

9

 

 

 

 

 

(+)

Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Collector

 

 

 

 

 

 

 

330 Ohms

 

 

 

 

 

 

 

 

 

1

 

2

3 4

5

 

 

 

(-)

Open

 

 

 

 

 

 

 

Emitter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* Maximum voltage and current on pins 1, 7, 8, and 9 is 60VDC; 10.0 mA.

PINS 4 & 5 - REMOTE SHUTDOWN ON BATTERY

1.This pin is functional only when the UPS is in battery mode. If the UPS is being powered by the utility, Pin 4 will ignore any signal on this pin.

2.Pin 4 requires a 5-12 VDC signal to shutdown. This normally comes form the serial port using Liebert’s contact closure cable. It cannot be used with just a contact closure unless the relay is used to switch a voltage source. A 5-12 VDC signal for 1.5 seconds or greater is required to signal a shutdown. Signals for less than 1.5 seconds will be ignored. After Pin 4 receives a shutdown signal for 1.5 seconds, the command cannot be canceled.

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Liebert 2700VA, 208V user manual Communications Interface Port, Pins 4 & 5 Remote Shutdown on Battery

208V, 2700VA specifications

The Liebert 2700VA, 208V is a robust and reliable uninterruptible power supply (UPS) designed to protect critical electronic equipment from power disturbances. This UPS is ideal for various applications, including data centers, telecommunications, and manufacturing environments, ensuring that business continuity is maintained even in the face of power outages or fluctuations.

One of the primary features of the Liebert 2700VA is its high power rating of 2700VA, which makes it suitable for supporting a range of devices, from servers to sensitive electronic equipment. With a nominal output voltage of 208V, it meets the electrical requirements of many industrial and commercial systems, making it an adaptable choice for enterprises with diverse power needs.

The Liebert 2700VA is equipped with advanced technologies that enhance its performance and efficiency. The unit employs double-conversion online technology, which ensures that the output power is consistently clean and stable. This technology continuously converts incoming AC power into DC and then back to AC, providing a seamless transition to battery power during an outage, eliminating any momentary interruptions.

In terms of characteristics, the Liebert 2700VA features an LCD display that provides real-time information on the UPS’s status, including input/output voltage, load level, and battery condition. This user-friendly interface allows for easy monitoring and management, making it convenient for IT professionals to maintain optimal operations.

Another significant aspect of the Liebert 2700VA is its advanced battery management system. This feature optimizes battery performance and life by regulating charging cycles and ensuring that batteries are in peak condition when needed. Furthermore, the UPS offers multiple communication options, including USB and serial connectivity, enabling integration with monitoring software and allowing for remote management capabilities.

The Liebert 2700VA also comes equipped with a range of protection features, including overload protection, short-circuit protection, and surge suppression. These attributes safeguard connected equipment from electrical anomalies, providing peace of mind in environments where downtime can be costly.

In conclusion, the Liebert 2700VA, 208V is a powerful UPS solution that combines advanced technology with essential features, making it a crucial asset for businesses seeking reliable power protection. Its robust capabilities, user-friendly interface, and extensive protection measures position it as an ideal choice for ensuring operational continuity in various critical applications.