Introduction to ABB IEMMU21

The ABB IEMMU21 is a high-integration module mounting unit, recognized as the “module integration backbone” for ABB Symphony Harmony INFI 90 distributed control systems (DCS). As a key infrastructure product in ABB’s Bailey series, it integrates standardized mounting interfaces, backplane signal transmission, and centralized power distribution functions, specializing in accommodating up to 12 industrial modules such as I/O modules, communication modules, and power supply modules. This unit provides stable mechanical support and reliable electrical connection for on-site control components, significantly enhancing the integration efficiency and maintainability of automation systems. Widely applied in petrochemical plants, thermal power stations, and large-scale manufacturing workshops, its robust industrial-grade design features a corrosion-resistant metal chassis and open top-bottom structure for efficient heat dissipation, enabling stable operation in harsh environments with temperature fluctuations from -20°C to +70°C.

Key Technical Specifications

Device Type: Module mounting unit for ABB Symphony Harmony INFI 90 DCS
Core Functions: Module mechanical fixing, backplane signal transmission, centralized power distribution, hot-swapping support
Compatible Modules: ABB I/O modules, communication modules, power supply modules; supports up to 12 modules
Mounting Compatibility: Standard 483-mm (19-in.) industrial cabinet; 35mm DIN rail adaptable
Power Distribution: Provides regulated DC voltages (+5V, +15V, -15V, +24V); compatible with 120/240V AC or 24/48V DC input
Power Consumption: Typical power ≤ 10W (excluding mounted modules)
Communication Support: Backplane supports Modbus RTU, PROFINET, Ethernet; compatible with RS485/RS232 interfaces
Mechanical Performance: Vibration resistance 13.2-100Hz (0.7g), 2-13.2Hz (12mm p-p displacement)
Operating Environment: Temperature 0°C to +70°C (cabinet internal); humidity 5-95% (non-condensing, up to 55°C)
Physical Specifications: 411.5mm × 505.5mm × 259.1mm; weight ~3.63kg (net), ~5kg (shipping)
Protection Features: Overcurrent protection for power output; anti-corrosion chassis; EMC compliant with industrial standards
Certifications: CE, UL compliant; RoHS certified; meets IEC 61131-2 industrial control standards

Recommended ABB Related Models

ABB IEMMU11: Single-power module mounting unit, cost-effective option for small-scale INFI 90 systems
ABB IEMMU12: Dual-power redundant mounting unit, ideal for critical control systems in thermal power plants
ABB PM864AK01 3BSE018161R1: AC 800M CPU controller, core processing unit for IEMMU21-mounted modules
ABB AI810 3BSE032456R1: 8-channel analog input module, perfect for IEMMU21-based signal collection
ABB DO810 3BSE032452R1: 16-channel digital output module, expands IEMMU21’s control execution capability
ABB 3BHB006449R0002: Power supply module, dedicated for IEMMU21’s backplane power distribution
ABB CI858K01 3BSE018135R1: Multi-protocol communication module, transmits data from IEMMU21 system to SCADA
ABB TP854 3BSE025349R1: 7-inch HMI, visualizes operating status of IEMMU21 and mounted modules
ABB SPSED01: Signal processing module, enhances IEMMU21’s data processing capability
ABB REF620: Digital relay protector, safeguards IEMMU21 and associated control circuits
ABB ACS880-07: Medium-voltage frequency converter, receives control signals from IEMMU21 system
ABB UFC762AE101 3BHE006412R0101: High-precision analog input module, suitable for IEMMU21-based power monitoring
ABB CI871AK01 3BSE092693R1: High-speed PROFIBUS module, ensures real-time communication for IEMMU21
ABB AC500 PLC: Compact controller, cost-effective complement to IEMMU21 in small automation scenarios
ABB 3ADT311500R0001: Excitation control module, integrates with IEMMU21 in generator control systems
ABB AW500053: I/O output card, expands IEMMU21’s interface compatibility with legacy equipment View more …..