GE Fanuc IC660BSM021 Genius Bus Switching Module

GE Fanuc IC660BSM021 Genius I/O Bus Switching Module for Dual Serial Bus Redundancy

Bus Switching Specifications and Electrical Ratings

• Brand: GE Fanuc | Part Number: IC660BSM021 | Type: Genius I/O Bus Switching Module for 24/48 VDC systems.
• Operating Voltage: 18 to 56 Volts DC, rated for 24 VDC and 48 VDC nominal power sources.
• I/O Block Capacity: Supports up to 8 discrete and analog blocks per BSM; 30 blocks maximum with additional BSMs.
• Switching Performance: Complete bus transfer in less than 20 milliseconds with 500,000 operation minimum reliability.
• Current Draw: 60 milliamps maximum at 48 Volts DC; 10 mA at 24 VDC on Bus A, 30 mA at 48 VDC on Bus B.
• Physical Size: Compact 3.50 x 2.25 x 2.5 inch form factor for space-constrained enclosures.
• Bus A State: Module remains de-energized below 4 Volts DC when operating on Bus A.

Dual Bus Redundancy and Operational Control

• Backup Communications: Provides automatic failover to secondary bus upon loss of primary bus communication.
• Control Source: Phase B discrete block in the cluster manages all IC660BSM021 switching operations.
• Bus Selection: Energizes only when selecting Bus B; front-panel LED illuminates when Bus B remains active.
• Switching Methods: Manual command via CPU, handheld monitor, or automatic upon communication loss.
• Anti-Cycling Protection: Prevents unnecessary repeated switching when alternate bus remains unavailable.
• System Integration: Each bus pairs with a bus controller or PCIM; supports CPU redundancy with controllers in separate CPUs.

Configuration and System Compatibility

• Configuration Tools: Genius handheld monitor or CPU programming for complete parameter adjustment.
• Version Differentiation: IC660BSM021 uses 24/48 VDC power; IC660BSM120 uses 115 VAC/125 VDC with identical functionality.
• Cluster Control: Dedicated output circuit in the controlling block enables bus switching during communication loss.
• Serial Connectors: Two serial bus interfaces for simultaneous dual bus attachment.

Frequently Asked Questions

• What is the primary function of the IC660BSM021? This module connects Genius I/O blocks to two serial buses simultaneously and switches between them during bus failures.
• How many I/O blocks can one IC660BSM021 support? A single BSM supports up to 8 discrete and analog blocks; additional BSMs extend capacity to 30 blocks.
• What voltage does the IC660BSM021 require? Operating voltage ranges from 18 to 56 Volts DC, suitable for 24 VDC and 48 VDC control systems.
• How fast does the bus switch activate? Switching completes in less than 20 milliseconds with 500,000 operation reliability rating.
• How do I configure the BSM for my system? Use any Genius handheld monitor or program the switching logic through the CPU.
• What controls the BSM switching operation? The Phase B discrete block in the cluster controls all IC660BSM021 functions through a dedicated output circuit.
• Do you stock the IC660BSM021? Yes, we maintain genuine new original units ready for immediate shipment.
• What is your shipping timeframe? We dispatch orders within 5 days via DHL, FedEx, or UPS.
• Can I return this item? Yes, we accept returns within 30 days for unused product in original condition.
• What cables ship with this module? Each unit includes three 15-inch prefabricated serial bus cables for immediate dual bus connection.
• What is the difference between IC660BSM021 and IC660BSM120? The IC660BSM021 operates on 24/48 VDC; the IC660BSM120 operates on 115 VAC/125 VDC. Functionality remains identical.

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