Schneider BMEH582040S M580 Safety CPU

Product Introduction

The BMEH582040S serves safety-critical duties within Schneider Electric's Modicon M580 platform. This Level 2 CPU combines redundant Hot Standby architecture with SIL3 certification. Engineers specify it for process plants that cannot tolerate downtime. A dual-core ARM processor runs at 600 MHz. The controller carries 8 MB of program RAM and 512 KB of data memory. Its conformal coating adds protection against harsh environments.

Technical Specifications

Specifically, the BMEH582040S meets SIL3 requirements under IEC 61508. The redundant Hot Standby design keeps a backup CPU synchronized with the primary unit. Remote I/O capacity reaches 8 X80 racks, while distributed devices reach 61. Built-in ports include one Ethernet service port, two Ethernet RIO/DIO ports, and one USB Mini-B port. Protocols cover Modbus TCP/IP, EtherNet/IP, and PROFIsafe over PROFINET. The CPU occupies 2 slots in an X80 Ethernet backplane. Compatible racks include 4, 6, 8, and 12 slots.

Mechanical and Environmental Parameters

Furthermore, the BMEH582040S measures 100 × 56 × 93 mm (H×W×D). It weighs 0.849 kg. Operating temperature ranges from 0 to +60 °C. Storage temperature spans −25 to +70 °C. Relative humidity sits between 5% and 95% without condensation. Protection rating is IP20, and the board carries a conformal coating. Supply voltage is 24 V DC (19.2–31.2 V DC via backplane). Power consumption reaches 7.2 W, with bus current at 300 mA at 24 V DC. An optional 4 GB SD card (BMXRMS004GPF) stores programs and data.

Installation Guide

First, install both CPUs in X80 Ethernet backplanes. Next, seat each unit in slots 0 and 1 for proper bus contact. Then, connect the 24 V DC supply through the backplane. After that, link the Hot Standby fiber or copper sync cable between the pair. Finally, program the system with EcoStruxure Machine Expert or Unity Pro XL. Verify that both units report identical firmware revisions before commissioning. Always confirm grounding and conformal coating integrity before power-up.

Packaging List

• 1 × Schneider BMEH582040S Redundant Hot Standby Safety CPU

• 1 × Product Documentation

Shipping methods: Fedex, UPS, DHL.

FAQ

Q1: What safety integrity level does the BMEH582040S achieve?
It reaches SIL3 under IEC 61508. This rating suits high-demand safety functions in process industries.

Q2: How does the Hot Standby architecture work?
Two CPUs run in parallel, and the backup tracks the primary continuously. If the primary fails, the backup takes over without stopping the process.

Q3: Does the BMEH582040S support PROFIsafe?
Yes, it handles PROFIsafe over PROFINET. This allows safe communication with certified field devices.

Q4: Which software programs the BMEH582040S?
Use EcoStruxure Machine Expert or Unity Pro XL. Both tools support safety application development for the M580 platform.

Q5: What communication ports does the BMEH582040S include?
It provides one Ethernet service port, two Ethernet RIO/DIO ports, and one USB Mini-B port. Protocols include Modbus TCP/IP and EtherNet/IP.