BMEH582040C Modicon Redundant CPU Conformal Coated ATEX Zone 2
Introduction:
The Schneider BMEH582040C is a redundant processor module for Modicon M580. It features 8MB of program memory and a dedicated HSBY port. This conformal coated CPU supports ATEX Zone 2 and IECEx Zone 22 hazardous areas.
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Product Overview of the Schneider BMEH582040C Processor
The Schneider BMEH582040C belongs to the Modicon M580 family of redundant processors. This module supports hot standby redundancy for high availability applications. The dedicated HSBY port synchronizes two processors in a redundant pair. Therefore, system uptime improves dramatically compared to standalone configurations.
This BMEH582040C processor supports 1 local rack for I/O modules. Application specific I/O includes serial link, HART, counters, and motion control. SSI encoders and accurate time stamping are also supported functions. Consequently, this CPU suits critical processes requiring continuous operation.
The processor controls 8 remote I/O stations with X80 drops. Each remote drop supports up to 2 racks for expanded capacity. Up to 64 distributed devices connect to the processor network. Thus, the BMEH582040C scales to medium sized redundant control systems.
Technical Specifications of the BMEH582040C
Product Range: Modicon M580
Product Type: Redundant processor module
Impregnation Material: Conformal coated
Number of Local Racks: 1
Remote I/O Stations: 8 (2 racks per X80 drop)
Distributed Devices: 64 maximum
Communication Modules: 2 Ethernet, 16 AS-Interface
Integrated Program Memory: 8 MB
Integrated Data Memory: 768 kB
System Memory: 10 kB
Expandable Flash Storage: 4 GB for data
Current Consumption: 270 mA at 24V DC
MTBF Reliability: 650,000 hours
Net Weight: 0.849 kg
Operating Temperature: -25 to 60°C
Storage Temperature: -40 to 85°C
Protection Rating: IP20
The BMEH582040C executes 30 K instructions per millisecond with mixed operations. Pure Boolean logic runs at 40 K instructions per millisecond. Accordingly, this redundant processor handles demanding real-time control requirements. The high MTBF of 650,000 hours supports long term reliability.
Hot Standby Redundancy Features
The BMEH582040C includes a dedicated HSBY Ethernet port for redundancy. This port connects directly to the peer processor for high speed synchronization. Two processor IDs are available: A and B for easy identification. The primary processor controls the I/O while the standby watches.
Eleven status LEDs provide clear indication of redundancy status. A green REMOTE RUN LED shows the peer processor is running. The A and B LEDs indicate which processor ID is assigned. The PRIM LED lights green when acting as the primary controller. The STBY LED lights green when acting as the standby controller.
The Hsby Diag LED shows the hot standby link status. Switchover between primary and standby occurs automatically upon fault detection. The new primary takes over control without disrupting the process. Consequently, system availability reaches very high levels for critical applications.
Hazardous Area and Environmental Certifications
The BMEH582040C carries extensive hazardous area certifications. ATEX Zone 2 and Zone 22 approvals enable use in explosive gas and dust environments. IECEx Zone 2 and Zone 22 provide international hazardous area compliance. Class I Division 2 certification covers North American requirements.
Gas resistance conforms to Class Gx per ISA S71.04 specifications. Gas resistance also meets Class 3C4 per IEC 60721-3-3 standards. Dust and sand resistance meet Class 3S4 for harsh industrial settings. Salt resistance is rated at Level 2 conforming to IEC 68252.
Mold growth resistance meets Class 3B2 per IEC 60721-3-3. Fungal spore resistance also meets Class 3B2 specifications. The conformal coating protects against moisture and airborne contaminants. Therefore, the BMEH582040C excels in offshore, chemical, and outdoor installations.
Communication and Network Capabilities
The BMEH582040C integrates multiple communication ports for connectivity. One Ethernet TCP/IP service port supports programming and diagnostics. Two Ethernet TCP/IP device network ports connect to field devices. A USB type mini B port provides local programming access. Finally, one dedicated Ethernet HSBY port handles redundancy synchronization.
Communication services include RIO scanner for remote I/O racks. DIO scanner manages distributed I/O over the device network. Two Ethernet communication modules can be added for more ports. Sixteen AS-Interface modules connect simple sensors and actuators.
The application structure includes one cyclic or periodic master task. One periodic fast task executes time critical code separately. Programmable loops are supported for process control applications. Motion control functions are integrated into this redundant processor.
Installation Guide for the BMEH582040C
Follow these steps to install the Schneider BMEH582040C correctly.
Power down both racks completely before installing processors.
Insert one processor into the primary rack designated as A.
Insert the second processor into the secondary rack as B.
Connect the HSBY ports directly using a shielded Ethernet cable.
Connect both processors to the same device network.
Set the rotary switches to assign unique processor IDs.
Power up both racks and observe the LED indicators.
Verify the PRIM LED on one and STBY LED on the other.
Download the same application to both processors.
Test switchover by powering down the primary processor.
The operating temperature ranges from -25 to 60°C for wide flexibility. For altitudes above 2000 meters, apply derating factors accordingly. Relative humidity should stay between 5 and 95% without condensation. The IP20 rating requires installation inside a protective control cabinet.
Package Contents for Schneider BMEH582040C
1 x Schneider BMEH582040C redundant processor module
1 x HSBY crossover cable (1 meter shielded)
1 x USB programming cable (type A to mini B)
1 x Installation and configuration manual (printed)
Frequently Asked Questions (FAQ)
1. Can I use BMEH582040C without a redundant partner?
Yes, this processor can run as a standalone unit without redundancy. However, the HSBY port and redundancy features will remain unused. For non-redundant applications, consider the standard BME series processors instead.
2. What is the maximum distance between primary and standby processors?
The HSBY port supports distances up to 100 meters using shielded Ethernet cable. Both processors must reside within the same local network segment. Fiber optic converters can extend this distance for remote installations.
3. Does this processor support Quantum I/O on remote drops?
No, the BMEH582040C supports only X80 I/O for remote drops. Quantum I/O is not compatible with this redundant processor model. Use a different M580 processor for mixed X80 and Quantum installations.
4. How long does a switchover take between primary and standby?
Switchover completes within one program scan cycle typically. The new primary takes control without losing I/O states. Process interruptions are minimal during the transition.
5. Is the conformal coating standard on this BMEH582040C model?
Yes, conformal coating is standard on the C version of this processor. This coating protects against humidity, dust, and chemical vapors. The coating also enables operation in ATEX Zone 2 hazardous areas.