Chapter 4: E2 Controller

4. E2 Controller

4.1 General

The advanced microprocessor-based E2 Series controller is a highly versatile and flexible A/C system controller. It is designed primarily for precision air conditioners. The controller is equipped with flexible software capable of meeting the specific needs of the application. The controller is completely programmed at the factory and most applications will require no field setup. However, you can easily view and adjust the default setpoints and their ranges from the user interface display. The program and operating parameters are permanently stored on Flash memory in case of power failure.

The E2 Series controller is designed to manage temperature and humidity levels to user-defined setpoints via control output signals to the A/C system. Control parameters have variable outputs from 0 to 100% of the full rated capacity. The controller continually receives inputs for the measurable control conditions (temperature and relative humidity) via sensors installed in the cabinet. The internal logic determines if the conditions require cooling or dehumidification. Control setpoints are established to maintain the room's designed conditions. The controller responds accordingly to changes and controls the output(s) to the air-conditioning system so temperature/humidity conditions reach the user-defined control setpoints.

4.1.1 Features

4.1.1.1 Field Configurable

The program for the E2 Series controller is field configurable, ao the operator can select control parameters and setpoints specific to the application. Operator interface for the E2 controller is provided via an attractive, door-mounted user interface display panel. The display panel has a backlit LCD graphical display and function keys, giving the user complete control and monitoring capability of the precision cooling system. The menu driven interface provides users with the ability to scroll through and enter various menu loops. Monitoring of room conditions and A/C system operation is allowed without entering a password. Modifications to the control setpoints require the use of a password.

4.1.1.2 Password Protection

You can access the Info menu and Alarms log without a password. The controller recognizes predetermined security levels before allowing access to display screens containing critical variables. Three secured menu levels (Control, Service, and Factory) support unique passwords that must be entered to access the menu screens so only authorized personnel may perform modifications to the settings.

4.1.1.3 Restorable Setpoint Parameters

Upon initial startup, the A/C system operates using the setpoints programmed by the factory. The customer may enter new operating parameters in the Control and Service menus and the system will then operate accordingly. The new setpoints may be stored as Customer Default setpoints. The primary setpoints entered by the factory still remain stored in the controllers' memory as Factory setpoints. The setpoints for the system may be re-adjusted in the Control menu at any time. If it becomes necessary, the customer may restore the setpoints back to the Customer Default setpoint values or to the original Factory (primary) setpoint values in the Service menu (See Section 4.5.5.9).

4.1.1.4 A/C Grouping pLAN Operation

Multiple A/C system controllers can be connected (grouped) to a Private LAN (pLAN) local network, allowing the communication of data and information from each controller to a central control terminal or lead controller. Use the lead controller display screens to monitor and adjust group control variables for the individual system controllers. Each E2 controller connected to the pLAN network must be identified with its own unique address.

Multiple A/C units consisting of up to eight (8) precision air conditioners equipped with like controllers may be controlled and monitored via the E2 series controller. With multiple A/C units each unit can selectively be configured as "Active" to operate as a primary A/C, “Capacity Assist” for staged operation, or as “Standby” to come on-line in case of a failed air-conditioning unit to ensure continuous availability. The controller may also be configured to rotate units with timed duty cycling to promote equal run-time and ensure that each A/C unit within the rotating group is operationally exercised on a periodic timed basis.

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Black Box CRDX-G-FS-24KW, CRDX-W-FS-12KW, CRDX-A-FS-24KW, CRDX-W-FS-24KW, CRDX-G-FS-12KW, CRDX-A-FS-12KW E2 Controller
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CRDX-W-FS-12KW, Black Box Cold Row DX, CRDX-W-FS-24KW, CRDX-A-FS-24KW, CRDX-A-FS-12KW specifications

The Black Box CRDX series consists of high-performance cooling solutions designed to maintain optimal temperature conditions in data centers and server rooms. Key models in this series include the CRDX-W-FS-12KW, CRDX-W-FS-24KW, CRDX-G-FS-12KW, and CRDX-A-FS-24KW. These units are engineered to provide efficient cooling while addressing the rising demands of modern IT infrastructure.

One of the standout features of the CRDX series is its cold row design. This configuration enables targeted cooling delivery directly to the equipment, enhancing efficiency and reducing energy consumption. The airflow management in these models ensures that cooled air is directed where it is needed most, minimizing hotspots and maximizing cooling performance.

Both the CRDX-W-FS-12KW and CRDX-W-FS-24KW models utilize advanced refrigerant-based cooling technology. These units are equipped with electronically commutated (EC) fans, which are highly efficient and quieter than traditional fan technologies. This innovation not only lowers operational costs but also creates a more comfortable environment within the data center.

The CRDX-G-FS-12KW model stands out for its hybrid capabilities, offering both chilled water and direct expansion cooling options. This versatility allows facility managers to choose the best cooling approach based on their specific requirements and current infrastructure. The hybrid system can optimize energy consumption and enhance cooling efficiency, contributing to lower operating costs.

Another noteworthy feature across these models is their intelligent controls and monitoring capabilities. Equipped with sophisticated sensors and control systems, operators can gain real-time insights into temperature fluctuations, humidity levels, and unit performance. This data aids in proactive maintenance and ensures that cooling systems are operating at peak efficiency.

The CRDX-A-FS-24KW, on the other hand, is designed with a focus on adaptability and scalability. This model can be integrated easily into existing network setups, making it an excellent choice for facilities that anticipate future growth or need to adapt to changing cooling demands.

Overall, the Black Box CRDX series exemplifies the latest advancements in cooling technology, offering innovative features designed to support high-density computing environments. With their efficient cooling capabilities, intelligent controls, and flexible design options, these models provide reliable solutions for data centers looking to enhance their cooling systems while reducing operating costs.
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