Hardware and Components, Keypad display | Liebert AC4 specification

Hardware and Components

The AC4 comes standard with an enclosure, a controller board and a liquid crystal display (LCD).

AC4 enclosure - Internal features

Back of LCD

Controller Board

				Knockouts and access slots


Ground wire for LCD				(top and bottom)
Ground wire for LCD

Enclosure

The AC4 enclosure features a key lock for added security. The enclosure is made of metal to accommodate secure conduit fittings and protect components against environmental debris.

AC4 enclosure - External features

Knockouts and	Key
access slots	lock
on top and
bottom

LCD for configuration and operation

•The enclosure is designed for easy wire routing and terminations. Access slots for communication cables and network wires are located on both the top and bottom of the enclosure.

•The enclosure is 2-3/4" deep, allowing for recess mounting in a wall. The enclosure may also be flush-mounted.

•The enclosure houses the LCD and the controller board.

Controller Board

The controller board supports a total of 10 points (four digital inputs, four digital outputs and two Common Alarm outputs).

Point Type	Point Count
Digital input	4
Digital output	4
Common Alarm output	2

The digital inputs are dry contacts. The digital outputs and Common Alarm outputs are Form C contact relays. The Common Alarm output is one output with two sets of contacts.

The point terminations are made using remov- able terminal blocks. This allows for easier access to the terminators, streamlining the pro- cess of connecting external devices to the AC4.

The controller board is a microprocessor-based platform for program execution.

The firmware, including the operating system and user-defined data, is stored in nonvolatile flash read-only memory. Flash ROM may be easily upgraded at the job site, simplifying the process of installing new firmware as it becomes available.

An RS232 operator terminal port is included with each controller board for operator devices such as a simple CRT terminal or laptop PC.

Keypad Display

The keypad display is a user interface mounted on the enclosure door of the AC4.

The display provides for complete monitoring and configuration of the panel and is password-protected.

The keypad display provides the ability for the AC4 to operate as a complete standalone panel.

Keypad display

AC4 specifications

The Liebert AC4 is a highly advanced cooling solution designed for critical environments, such as data centers and telecommunications facilities. As data demands rise and IT equipment generates significant heat, an effective cooling system is paramount to maintaining optimal performance and reliability. The Liebert AC4 stands out in this space, offering a blend of efficiency, flexibility, and innovative technology.

One of the main features of the Liebert AC4 is its adaptability to various configurations and applications. It can be deployed in both hot aisle and cold aisle containment setups, making it versatile for different data center designs. This flexibility allows facilities to implement cooling strategies that align perfectly with their specific layouts and operational requirements.

The Liebert AC4 employs cutting-edge, variable-speed fans that enhance energy efficiency. These fans adjust their speed according to the cooling load, ensuring that the system operates at peak efficiency while significantly reducing energy consumption. This feature is essential in critical environments, where minimizing operational costs is often as important as maintaining optimal temperatures.

In addition to energy-efficient cooling, the Liebert AC4 integrates advanced monitoring and control technologies. With built-in intelligence and compatibility with the Liebert SiteScan monitoring system, users can ensure real-time visibility into their cooling operations. This monitoring capability enables data center managers to make informed decisions and swiftly address any cooling anomalies, minimizing the risk of overheating and downtime.

Furthermore, the system is designed to be easy to install and maintain, reducing downtime during setup and upkeep. The modular design allows for scalability, enabling organizations to expand their cooling capabilities as their needs grow.

The Liebert AC4 also features a robust construction that enhances reliability and durability, making it an ideal choice for environments where equipment uptime is critical. Its streamlined design not only optimizes airflow and cooling distribution but also contributes to aesthetic considerations in professional settings.

In conclusion, the Liebert AC4 combines efficiency, versatility, and advanced technologies to deliver a reliable cooling solution for modern data centers and critical facilities. Its variable-speed fans, flexible configurations, and advanced monitoring capabilities position it as a leader in the competitive field of cooling solutions, ensuring that critical equipment remains operational and efficient. Organizations looking to enhance their cooling strategies will find the Liebert AC4 to be an invaluable asset in today’s fast-paced digital landscape.