ABB 500SCM01 (1MRB150004R0001) AC500 FBP Bus Coupler Module
High-Speed FBP Bus Expansion for ABB AC500 Distributed I/O Automation Systems
1. Core Product Overview
The ABB 500SCM01 (order code: 1MRB150004R0001) is a dedicated FBP (Flexible Bus Protocol) bus coupler module for the ABB AC500 PLC series, serving as the core communication hub for building distributed I/O systems and extending FBP bus coverage in large-scale industrial automation sites. It bridges the AC500 main CPU unit and remote I/O modules, enabling high-speed data transmission between the central control system and distributed field devices via the FBP bus, with a maximum transmission rate of 1Mbps and extended communication distance for on-site flexible deployment. Built with industrial-grade rugged design, it integrates 2.5kV electrical isolation, EMC/surge protection and anti-vibration structure, operating stably in -20°C to +70°C harsh industrial environments with strong electromagnetic interference. Fully compatible with all AC500 series CPUs, I/O modules and power modules, it supports hot plug and online expansion of I/O modules, making it an essential component for building scalable, distributed AC500 automation systems in large factories, production lines and remote industrial sites.
• Core Role: AC500 FBP bus extension; distributed I/O system coupling; main CPU & remote I/O data transmission; bus fault diagnosis; multi-bus chain networking
• Model Info: 500SCM01 (base model); 1MRB150004R0001 (ABB official order code); AC500 series FBP bus coupler module
• Key Specs: 1Mbps max FBP baud rate; 2.5kV bus isolation; max 32 I/O modules per chain; hot plug support; -20°C~+70°C operating temp; IP20 protection
• Reliability: EMC/surge protection; bus fault self-diagnosis; auto-baud detection; anti-vibration design; real-time status indication
2. FBP Bus Performance & Expansion Capacity
The 500SCM01 1MRB150004R0001 is built with a high-speed FBP bus communication controller, supporting adjustable baud rates from 125Kbps to 1Mbps with auto-baud rate detection, automatically matching the communication parameters of the AC500 main CPU for plug-and-play use without manual configuration. As a dedicated FBP bus coupler, it enables single-bus chain expansion of up to 32 AC500 series I/O modules (digital/analog/temperature), and supports multi-coupler cascade networking to build large-scale distributed I/O systems with thousands of I/O points for complex industrial processes. The FBP bus adopts RS485 physical layer with differential signal transmission, strong anti-interference ability, and the maximum communication distance can reach 1000m at 1Mbps baud rate (extendable to 2000m at lower baud rates), meeting the long-distance communication requirements of large industrial plants and remote field sites. The module supports real-time FBP bus data transmission with millisecond-level response delay, ensuring the synchronicity and real-time performance of central control and distributed I/O.
• FBP Bus Parameters: 125Kbps~1Mbps adjustable baud; auto-baud detection; RS485 differential transmission; millisecond-level data delay
• Expansion Capacity: Max 32 AC500 I/O modules per bus chain; multi-500SCM01 cascade; thousands of I/O points for large-scale systems
• Communication Distance: 1000m @1Mbps; 2000m @125Kbps; no repeater required for standard distance; support for bus repeater extension
• Data Transmission: Real-time bidirectional data exchange; FBP bus protocol optimization; high data transmission efficiency; no packet loss in industrial environment
3. Isolation Protection & Intelligent Fault Diagnosis
The 500SCM01 1MRB150004R0001 adopts a full industrial isolation design to ensure reliable FBP bus communication in high-interference environments, with 2.5kV electrical isolation between the FBP bus port and the module internal circuit, and 1kV isolation between the power supply and communication circuit—effectively eliminating ground loop interference and cross-talk between the central control system and distributed field devices, avoiding communication failure caused by industrial electrical anomalies. The module integrates multi-level EMC/surge protection compliant with IEC 61000-4 standards, with built-in surge suppressors and EMC filters to resist electromagnetic interference from frequency converters, high-voltage motors and other industrial equipment, and power grid surges. It is equipped with intelligent FBP bus fault diagnosis function, which can real-time detect bus disconnection, short circuit, abnormal baud rate and module offline, and transmit fault information to the AC500 main CPU via the FBP bus, with front-panel LED indicators for visual fault alarm, enabling on-site maintenance personnel to quickly locate and resolve bus faults.
• Isolation Design: 2.5kV FBP bus & internal circuit isolation; 1kV power & communication isolation; optical isolation for signal transmission
• EMC/Surge Protection: IEC 61000-4-2/3/5 compliant; anti-static; surge resistance; EMC filter; bus interference suppression
• Fault Diagnosis: Real-time bus disconnection/short circuit detection; module offline alarm; abnormal baud rate identification; fault feedback to AC500 CPU
• Fault Indication: Front-panel multi-LED indicators (Power/Run/FBP Link/FBP Activity/Fault); bus fault alarm output; non-volatile fault logging
4. AC500 Integration & Installation
The 500SCM01 1MRB150004R0001 achieves plug-and-play integration with all ABB AC500 series PLC components, including CPUs (500CPU03/02/01), power modules (500PSM02/03A), I/O modules and communication modules (500CSP04), without additional software configuration—automatically recognized and added to the AC500 system after power-on. It supports hot plug function for connected I/O modules, enabling online replacement and expansion of I/O modules without shutting down the AC500 system, reducing industrial production downtime caused by equipment maintenance. The module features standard 35mm DIN rail mounting with a compact form factor (80×100×65mm), occupying minimal space in industrial control cabinets and distributed I/O enclosures, suitable for on-site installation in narrow spaces. It uses spring-type terminal blocks for fast, tool-free wiring of the FBP bus and power supply, with clearly marked terminals to avoid wiring errors, and the front panel has a compact design with integrated status indicators for easy on-site status checking and fault diagnosis.
• Compatibility: Plug-and-play with all AC500 series modules; auto-recognition by AC500 CPU; no additional software configuration
• Hot Plug Support: Online I/O module replacement/expansion; no system shutdown required; reduce production downtime
• Mounting & Wiring: 35mm standard DIN rail; 80×100×65mm ultra-compact size; spring-type terminal blocks; tool-free fast wiring
• Power Supply: 24V DC system power (18-30V); reverse polarity protection;<2W ultra-low power consumption; isolated power for bus
5. Typical Applications & Industrial Compliance
Key Industrial Sectors: Chemical/petrochemical process control; thermal/hydro/wind/solar power generation; steel/metallurgy automation; water/wastewater treatment; large-scale manufacturing lines; mining machinery; building automation; remote industrial site automation.
Core Use Cases: AC500 FBP bus long-distance extension; distributed I/O system building; large factory multi-point I/O networking; remote field device data collection; industrial production line I/O expansion; critical process redundant bus configuration; narrow space on-site I/O installation.
Certifications & Compliance: IEC 61131-2 (industrial control equipment); IEC 61010-1 (electrical safety); IEC 61000-4 (EMC/surge/anti-static); IEC 60068 (vibration/shock); CE/UL/RoHS certified; -20°C to +70°C operating temperature; IP20 front panel dust protection.
Spare Part & Warranty: ABB genuine original module; factory pre-tested for bus communication performance; 18-month standard warranty; 100,000+ hours MTBF; fully compatible with all AC500 system firmware versions; technical support for distributed I/O system configuration and bus networking.
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Technical Documentation | ABB 500SCM01 1MRB150004R0001 | AC500 Series FBP Bus Coupler Module
