IC660BSM021 - Genius I/O Bus Switching Module

SPECIFICATIONS

Part No.: IC660BSM021
Manufacturer: General Electric
Product Type: Genius I/O Bus Switching Module
Availability: In Stock
Operating Voltage: 24/48VDC
Series: VersaMax

Functional Description

IC660BSM021 is a Genius I/O Bus Switching Module developed by GE Fanuc. It is a Bus Switching Module (BSM) within the GE Fanuc Genius I/O system, designed to facilitate the connection of input/output (I/O) devices to two independent serial buses simultaneously. This dual-bus setup is integral in creating a redundant communication pathway, ensuring that the system can maintain operation even if one of the buses fails.

Versions and Compatibility

• BSM021: Operates with a 24/48 VDC power supply.
• BSM120: Operates with a 115 VAC/125 VDC power supply.

Both versions are functionally identical, except for their power sources, and are designed to accommodate a wide range of industrial applications.

Connectivity and Capacity

• The module is highly versatile, and capable of connecting up to eight discrete and analog blocks to the dual bus system.
• For larger setups, it can interface with up to 30 I/O blocks when additional BSMs are incorporated. This scalability makes ideal for complex industrial systems that require robust and reliable communication across multiple devices.

Dual Bus Configuration and Redundancy

• The dual bus configuration provided allows for a backup communication path.
• In the event of a failure on the primary bus, the system can switch to the secondary bus, ensuring continuous operation. Each bus in the dual system is linked to a bus controller or PCIM (Programmable Communication Interface Module), and the system can support CPU redundancy by placing each bus interface module in different CPUs.
• This architecture significantly enhances the reliability and fault tolerance of the system.

Operation and Switching Mechanism

• It is controlled by a phase B discrete block within the system cluster. The module’s first circuit is specifically dedicated in allowing it to switch between buses when communication is lost on the current bus. If switching fails to restore communication, the module will remain connected to the last operational bus until communication is restored or power is cycled. This approach prevents unnecessary switching, which could otherwise disrupt system operations.
• In its default state (de-energized), connects the blocks to bus A. It becomes energized only when it needs to switch to bus B. An LED indicator on the module lights up when bus B is active, providing a clear visual cue for monitoring purposes. The bus switching can also be manually commanded via the CPU or a handheld monitor, offering flexibility in how the system is managed.

The WOC team is always available to help you with your Mark I and II requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IC660BSM021?
It is a Genius I/O Bus Switching Module developed by GE under VersaMax series.

Can the module support CPU redundancy?
Yes, the system can support CPU redundancy if each bus interface module is connected to a different CPU.

How is the module configured?
The module is configured using the phase B discrete block within the system cluster. It also features an LED indicator for visual status and can be manually commanded via the CPU or handheld monitor.

What should be considered when installing the module?
The module should be installed in a clean area free of airborne contaminants, with adequate cooling and airflow. Proper grounding is also essential to ensure reliable operation.