Schneider Electric BMEH582040 M580 Redundant Processor 8 MB

BMEH582040 M580 redundant processor for hot standby systems

The BMEH582040 is a Schneider Electric product listed in the datasheet as: redundant processor, Modicon M580, 8MB, 61 Ethernet devices, 8 local racks, 8 remote IO racks [TAA]. The BMEH582040 is the redundant processor of the Modicon M580 platform. Two identical processors run in a hot-standby pair, so that the control task continues when one unit or its power supply fails. It is meant for plants where an outage is costly. Seven Star LLC supplies the BMEH582040 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference: BME is the M580 platform and H58 the hot-standby processor series; the title in the datasheet states 8 MB memory, 61 Ethernet devices and 8 remote I/O drops. The same number repeats in each processor of the pair.

Technical specifications of the BMEH582040

How a redundant pair behaves and what the BMEH582040 provides

Racks: 1. Remote I/O stations: 8 – 2 X80 remote drop. Distributed devices: 64. Memory: Expandable flash, 4 GB data storage; Integrated RAM, 10 kB system memory; Integrated RAM, 8 MB program; Integrated RAM, 768 kB data. Services: DIO scanner; RIO scanner. Cybersecurity: DoS prevention; IPSec; SNMP logging; Syslog protocol support; Transport layer security; Audit trail; Embedded firewall; Firmware signature. Reliability: 650000 H.

In a hot-standby system the primary processor runs the logic while the standby copy follows through a dedicated link. On a failure of the primary, the standby takes control with a bumpless transfer that depends on the scan time and the process variable handling. Retained variables and system bits move across the link.

Sync link, rack and I/O architecture of the BMEH582040

A redundant system needs two racks with identical modules, a synchronisation link between the processors and Ethernet remote I/O drops, since local racks are not redundant. The datasheet lists remote I/O stations, distributed devices and the communication services.

Design the network as a ring or dual network so that a single cable failure does not defeat the redundancy. Document what is redundant and what is not before the project is accepted.

Selection and ordering checklist for the BMEH582040

• Two processors are needed for one redundant pair, ordered with identical firmware.
• Number of remote I/O drops required.
• Ethernet architecture: rings and switches.
• Engineering software with redundancy support.
• Need for high-availability rack power supplies.
• Plan for online firmware upgrade procedure.

Commissioning and testing the BMEH582040

Install both processors, connect the sync link, configure the redundancy in the engineering software and download. Perform a switchover test under controlled conditions, then simulate the loss of a processor power supply.

Include the switchover test in the factory acceptance test and repeat it at site acceptance. Keep both processors at the same firmware level and keep a documented procedure for replacing one half without stopping the process.

Typical applications of the BMEH582040 in Oman and the GCC

Typical use is on critical utilities: power-plant auxiliaries, gas-compression control, water-treatment trains and pumping stations where trips are expensive. A redundant PLC adds hardware but not by itself a safety function, so do not use it as a substitute for a safety system.

Dimensions, environment and approvals of the BMEH582040

The BMEH582040 weighs 0.849 kg. Mounting, derating and enclosure choices follow the environmental data below, which should be compared with the actual panel temperature and the dust and humidity of the site in Oman and the GCC.

Ambient temperature limits in the datasheet: -40 to 85 °C. Relative humidity: 5 to 95 % 55 °C without condensation. Ingress protection: IP20. Operating altitude: 0 to 2000 m; 2000 to 5000 m with derating factor. Vibration resistance: 3 gn. Shock resistance: 30 gn. Standards listed: IEC 61131-2; IEC 61010-2-201; UL 61010-2-201; CSA C22.2 No 61010-2-201; IACS E10; EN/IEC 61000-6-5, interface type 1 and type 2. Certifications listed for this reference: CE; UL; CSA; RCM; EAC; Merchant Navy; UKCA.

Information to send with an RFQ for the BMEH582040

• Full reference and quantity required
• Existing equipment, panel or rack it must fit
• Supply voltage, load or signal details of the application
• Required delivery location and timing
• Whether a spare, a replacement or a new installation

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.