Data Center Monitoring

    While the conference “RIF + CIB” is gaining momentum, we decided to talk a little about the monitoring system in the data center.

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    We already thought about how to control the operation parameters of the equipment at the design stage of the data center. There are several ways to integrate sensors and various devices into a single system, and perhaps the most popular of them is SNMP control, a simple network management protocol. But we decided to go the other way, more industrial: to use industrial systems of automatic monitoring and control. Moreover, the air conditioners planned for the purchase and installation fully met the requirements of this approach, being able to output data using the Modbus protocol (industrial client-server protocol) and through dry contacts. Uninterruptible power supplies also had the same functionality. True, SNMP modules were also attached to them. We plan to integrate them into the system with its planned update within a year or two. They won’t make much weather, but if you integrate it, it’s to the end. In the meantime, the performance indicators of the equipment are recorded using the Modbus protocol and enter the system implemented on the components of the Xenta line of the famous Swedish company TAC, now part of the all-consuming Schneider Group.

    Air conditioners and UPSs, obviously, are not limited to this. The racks are equipped with temperature sensors, in cold and hot corridors - temperature and humidity. Usually all sensors are placed on top, but if necessary (usually, at the request of the customer) we can place additional sensors in any place, for example, next to especially sensitive equipment in the rack.

    As a result, each air conditioner, chiller and UPS transfer data on their work to a single system. Moreover, data transmission is two-way, which allows you to start, stop and change equipment settings. This is one of the capabilities of the Modbus protocol: an engineer can connect from almost any device (and from anywhere) and issue control commands. But the Italians from Geoclima went the farthest: chillers of their production can even be monitored through a GSM gateway.

    Some points are dotted.

    In case of failure, the monitoring system is integrated with the access control system. We plan to organize an SNMP gateway in order to send data to the monitoring system (SCADA) through the converter. This will allow, in particular, to accumulate detailed statistics on the load of sockets of the power distribution system (PDU) inside the rack. Diesel generator sets are also connected to the system, this makes it possible to control operation parameters and monitor fuel consumption in real time.

    Automation cabinet (there are six in the data center). The photo shows the TAC Xenta hubs.

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    PCO Web interface, dry contact system.

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    View from the side.

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    Dry Contact System

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    Rack temperature sensor.

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    The control device on the front door of the rack.

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    Motion Sensor.

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    Workstation in a Network Management Center (NOC).

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