Circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit overcurrent. Its main function is to cut off the current flow after a fault is detected.

Circuit breakers are more useful hardware mechanisms that replace fuses. Circuit breaker commonly used for PDUs is usually Thermal Circuit breaker. Thermal Circuit Breakers can only be reset when there is a fault in the circuit and they cannot be reset manually. The biggest problem of these circuit breakers is their tripping due to the change caused by the ambient temperature.

In addition to the thermal circuit breaker, there are also hydraulic-magnetic circuit breakers. In addition to doing all the thermal circuit breakers can do, these circuit breakers have a structure that is much more sensitive and not affected by temperature changes.

It aims to protect IT equipment against overload thanks to the Hydraulic-Magnetic Circuit Breakers that Exagate offers among the PDU types offered, contact us to examine the PDUs that are not affected by temperature and have sensitive circuit breaker function.


Power Usage Efficiency, also known as PUE, is a standard that was used by Green Grid in 2007 to increase efficiency in electricity consumption. PUE measurements can be made in two ways. First, PUE can be calculated by manually checking the data received from the data center to be measured, reading it periodically and saving it in a system. The second method is that the measurements can be automatically calculated by transmitting the data received by IP PDUs from servers and energy analyzers to a Data Center Infrastructure Management (DCIM) system.

Today, the importance or functionality of PUE has not been fully adopted by many data center managers. As everyone knows, having the PUE value as close to 1 as possible is one of the most important conditions for data center efficiency. When the PUE value shows 1, it shows that the power used by the devices in a data center is working with 100% efficiency.

Calculation of Power Usage Efficiency or PUE;

(Cooling + lighting + data processing devices + energy used by other electrical devices) / (Energy used by data processing equipment)

It is calculated as. For this reason, PUE can never be 1.

Another definition that is also used to measure the efficiency of data centers is Data Center Infrastructure Efficiency or DCiE. DCiE also expresses how efficiently a data center works in terms of power consumption at the efficiency rate of the value given to the PUE. DCiE calculation is no different from PUE and it is shown as the percentage of efficiency.

(Cooling + lighting + data processing devices + energy used by other electrical devices) / (Energy used by data processing equipment) x100

The energy consumption determined by taking these two parameters into account is listed as follows in terms of efficiency of data centers.

PUE DCiE Efficiency Level
3.0 %33 Inefficient
2.5 %40 Low Efficiency
2.0 %50 Average
1.5 %67 Efficient
1.2 %83 High Efficiency

The PUE value of an average data center is 2.5 within the framework of the researches carried out by the Uptime Institute. This shows that only 1 watt of each 2.5 watt of electricity coming to the data processing equipment is used by the data processing equipment.

Causes productivity to fall;

  • Improper cooling installation
  • Not using high efficiency UPS
  • Inefficient use of devices other than IT equipment

It is among the arrangements that can be made to keep the PUE value at efficient levels. The most important application that can be done to improve the PUE value is that IT equipment can regularly measure this. The IP PDU that can be used for this purpose will greatly benefit in showing where and how much power consumption in data centers is consumed.

Contact us to increase the efficiency of your data center and learn the PUE value.



Today, Data Centers are looking for innovative methods to meet the increasing power consumption. For this reason, Data Center managers have started to prefer IP PDU, Smart Power Monitoring Systems and IP PDU sensors, also known as Smart Plugs, to control power consumption. The main purpose of using these technologies is to control the power consumed by Data Centers and to reduce their expenses, as well as to create Data Centers in accordance with the “Green Energy” protocol.

Within the framework of the global data center PDU market research projected for 2017-2026; Only part of the turnover obtained in 2018 that belongs to PDU has reached 1.9 billion dollars. It is predicted that the growth that the PDU market will have on the basis of investments until 2026 will reach 7% annually in the next 7 years.

Another service provided by Exagate’s IP PDUs is that they can be integrated with sensors. With these sensors, it has made it possible to monitor the environment as well as instantly report energy data. Thus, it is also possible to access all kinds of environment and energy data about Data Center equipment at any time. Smoke, humidity, temperature, air flow etc. Up to 4 sensors can be connected. Being able to easily report environmental factors plays a big role in extending device life and preventing possible malfunctions. Thanks to the real-time reporting and retrospective archiving features of IP PDUs and sensors, it is very easy to perform energy and environment monitoring functions in Data Centers that process Big Data.

It provides services to optimize the amount of electricity consumed within the scope of Energy and Environment monitoring solutions owned by Exagate, to control environmental factors and to reduce the cost of the Data Center.

Modbus and Modbus / TCP which one is suitable for your IT room?

Modbus and Modbus / TCP which one is suitable for your IT room?

MODBUS is a data transmission protocol developed for industrial control applications. There are more than one protocol options in Modbus. Two of the most common of these protocols are Modbus and Modbus-TCP / IP protocols. Although these two protocols are similar, cost and speed are the factors that make the difference between these two protocols.

Modbus is widely used especially in the industrial production environment. It has a common link implemented by hundreds of vendors for integration into many different production devices to transfer discrete / analog input / output operations and record data between controllers. Modbus uses a master-slave architecture for which one device is responsible. Modbus protocol uses formatted messages to communicate between Master and Slaves. The messages are initiated by the system Master and sent to a Slave device. The slave then responds with the requested data or by reporting that it has performed the requested function. All messages from the master contain a two byte (16 bit) CRC (cyclic redundancy check) checksum value for error checking. In the event of an invalid request being forwarded to a Modbus Slave device, a one-byte (8-bit) error code value is returned for some reason the request was erroneous.

Another protocol of Modbus is Modbus TCP. Ethernet TCP is the common transport protocol of the Internet and is actually a layered protocol set that provides a reliable data transport mechanism between machines. Ethernet has become the de facto standard for enterprise business systems, so it is not surprising that it has also become the de facto standard for factory networking. It is the protocol version of the Modbus protocol that has a TCP interface and runs on Ethernet. With Ethernet, you combine a versatile, scalable, worldwide physical network in TCP and Modbus, a universal network standard. Modbus is a simple command and control protocol adapted to a variety of environments, including TCP / IP, SMS and wireless transceivers.

The main difference between MODBUS and MODBUS TCP is that MODBUS TCP runs on an Ethernet physical layer and Modbus is a serial level protocol. You may encounter many problems in Modbus setup to ensure the RS485 network working properly. Cable termination problems, network termination problems on the other hand, you do not have to deal with d configuration issue on Modbus TCP Ethernet devices.

Playing an important role in monitoring critical infrastructure and information systems, these Modbus sensors; temperature, humidity, air flow, water and their hybrid models. In addition to monitoring environment, real-time three-phase voltage, current, frequency, power, active and reactive capacitive Fi tracking modules and GSM module allow the user to call and send messages in case of alarm.

Contact us to find out which Modbus sensor is suitable for your Data Center and IT rooms.



Energy distribution units developed for Data Centers may seem too insignificant to affect the performance of your Data Center. However, the PDU you will choose to use, the reliability and flexibility of your Data Center, and most importantly, the future scalability of your Data Center is possible with completely selected hardware. In this context, we will talk about commonly used PDU types in our article.

Basic PDU, which is the type we will talk about first, is like a multi-socket with a certain number of inputs. Basic PDUs, whose task is to provide energy to active devices in Data Centers and optionally provide energy monitoring via the device with an ammeter, are professional equipment for data centers and system rooms. The difference of Basic PDU from multiple sockets is that the inputs consist of c13-c14 cables and contain surge suppressing equipment to protect critical equipment in Data Center and IT rooms from current. In addition, Basic PDU, which can be equipped with hydraulic magnetic or thermal circuit breakers optionally, prevents malfunctions due to human error thanks to external and internal locked sockets. In addition to these features, it has colorful inputs and outputs in order to minimize the complexity of the server room and facilitate cable organization with its color options. Optionally, measurement can be made on the device by integrating the LCD screen on it. Thanks to the integrated screen hot swap feature, it makes it possible to change it in case of malfunction while energy is passing through the device. These types of Basic PDUs are generally ideal for data centers and IT rooms with smaller scale and minimal data processing.

Another type of PDUs are IP PDUs. IP PDUs are divided into 4 groups within themselves; Metered IP PDU is Metered & Switched IP PDU, Outlet Metered IP PDU and Outlet Metered & Switched IP PDU.

The biggest advantage of IP PDUs owned by Exagate product family is that it can measure power consumption and then interpret this data in a way that the user can read with the embedded linux software it has. Thanks to its advanced user interface, it can reflect the measured values ​​to the user as wattage, amperage and current, frequency, active power, real power, energy (kWh) and power factor. IP PDUs can provide complete energy up to 60 ° C with 1% precision and durable 56 × 56 casing. Thanks to the Hotswap feature, the energy on the device can be changed to the integrated screen. It provides security thanks to its external and internal socket locking feature. In case of need for IP PDUs; smoke, humidity, temperature, air flow, etc. Up to 4 sensors can be connected. IP PDUs are generally preferred by the owners of higher level data centers. Thanks to their data collection and processing feature, they provide a more conceptual reporting option by measuring the power consumption while providing the functionality of IT equipment.

You can review our products to find the PDU you need for your data center. For detailed information, please contact