Overview
The Elreha BMO 3011 is a bus-mounted digital input module engineered for 230V mains voltage sensing applications. Rated at 5VA, 50Hz, this module provides 24 independent digital inputs for monitoring fault signals, equipment feedback, and system status in refrigeration, HVAC, and industrial automation systems. The module communicates via RS-485 (ICOM protocol), allowing direct integration with Elreha central control units and distributed cooling systems.
Key Features
- 24 Digital Inputs — each rated for mains voltage (230V AC), 2 mA maximum per input
- RS-485 Interface — ICOM-compatible protocol for reliable serial communication
- LED Status Indicators — per-input LEDs for visual fault and status monitoring
- DIN-Rail Mounting — standard EN 50022 rail compatibility for cabinet integration
- Compact Design — ABS housing with transparent cover, IP 30 rated
- Wide Voltage Range Inputs — designed for 230V mains sensing without galvanic isolation required for many fault circuits
Technical Specifications
- Input Voltage (Module Power): 230V AC ±10%, 50Hz
- Rated Power Consumption: 5VA
- Digital Inputs: 24 channels
- Input Signal Type: Mains voltage (230V AC)
- Input Current per Channel: 2 mA maximum
- Communication Interface: RS-485 (ICOM protocol)
- Communication Speed: Baud rate configurable via switch settings
- Addressing: DIP switch selectable (address visible via LED tens/ones indication)
- Housing Material: ABS with transparent cover
- Protection Class: IP 30
- Operating Humidity: 85% r.h., non-condensing
- Mounting Standard: EN 50022 DIN rail
- Status Indicators: LED indicators for mains and communication status
Typical Applications
- Refrigeration Systems: Compressor and condenser fan feedback, oil pressure, hot-gas, and suction pressure monitoring
- Cooling Plant Control: Multi-stage cooling unit supervision with distributed I/O across RS-485 networks
- HVAC Systems: Equipment status, phase failure detection, asymmetry alarms, and night-operation signaling
- Fault Monitoring: Motor protection relay integration, high-pressure shutdown, and frost-protection interlock sensing
- Industrial Automation: Emergency stop circuits, interlocks, and safety signal aggregation for central controllers
Compatibility & Replacements
Compatible With
- Elreha VPR 5000, VPR 5140, VPR 5240, and VPR 5340 central control units
- Elreha BMR 3001 (relay output modules) and BMA 32XX (analog I/O modules) on same RS-485 bus
- Distributed refrigeration control systems requiring mains voltage fault input sensing
- RS-485 ICOM protocol networks with standard address assignment
Replaces / Drop-In Replacement For
- Earlier Elreha BMO 3011 revisions (hardware-compatible upgrades)
- Custom 24-channel 230V digital input assemblies in existing refrigeration cabinets
- Verify compatibility with your system integrator before ordering.
Works With
- RS-485 / ICOM serial communication networks
- Elreha refrigeration control software (VPR series)
- Standard DIN-rail mounted control cabinets (EN 50022 compliant)
- 24V DC auxiliary power supplies for module energization
