Overview
The BMEH586040 is a Schneider Modicon M580-series PLC expansion module, order code BMEH586040, carrying 64 MB of program and data RAM plus 4 GB of expandable flash storage. It integrates six Ethernet communication ports — one service port, two device network ports, one HSBY port — and draws its supply from the rack backplane. Rated IP20 for in-cabinet mounting, it carries CE, UL, CSA, RCM, EAC and Merchant Navy certifications and is compliant with IEC 61131-2, IEC 61010-2-201, UL 61010-2-201, and EN/IEC 61850-3.
The BMEH586040 functions as a high-capacity expansion processor within a Modicon M580 rack, handling program execution, data logging, and hot-standby synchronisation. Its 64 MB of integrated RAM for program and data supports large control applications with extensive tag databases and recipe management, while the 4 GB expandable flash provides room for data storage, firmware archives, and web-server content. The six Ethernet ports enable segmented network topologies: a dedicated service port for programming and HMI, two device network ports for plant-wide I/O and drive communication, and an HSBY port for redundant processor links. On-board diagnostics are delivered through a comprehensive LED array — RUN, ERR, I/O fault, DL, BACKUP, ETH MS/NS, REMOTE RUN, A/B processor ID, PRIM/STBY, FORCED IO, and Hsby Diag — giving immediate visual status of processor health, network connectivity, and redundancy state. The module is Achilles certified for cybersecurity, with IPSec, SNMP logging, Syslog, TLS, audit trail, embedded firewall, firmware signature, password protection, port hardening, and secure HTTPS communication.
Applications
This expansion module is deployed in process and hybrid automation applications where high availability and cybersecurity are critical — oil and gas pipelines, power substations, water treatment plants, and marine systems. Its EN/IEC 61850-3 compliance suits electrical substation automation, while the Merchant Navy certification covers shipboard control systems. The module supports application-specific I/O including counter, SSI encoder, serial link, HART, accurate time stamping, and motion control, making it suitable for complex skids and rotating machinery.
The BMEH586040 is an active, in-production module within Schneider's Modicon M580 range. It carries CE, UL, CSA, RCM, EAC, Merchant Navy certifications.