Honeywell 10001/R/I Vertical Bus Driver (VBD)

    The Central Part (CP) of the FSC system is connected to the I/O level via the vertical bus driver (VBD) modules, which are located in the Central Part rack. A maximum of 14 vertical bus drivers can be installed per Central Part. Each vertical bus driver can support up to 10 horizontal bus driver (HBD) modules.
   The maximum distance between a vertical bus driver and any I/O rack on the vertical bus is 5 m (16.4 ft).

   The 10001/1/1 and 10001/R/1 modules consist of two parts: electronic part (mainboard), and wiring part (10001/A/1).
   The bolts on the 96-pin connector are used to secure the 10001/A/1 part of the VBD to the 19-inch rack. This allows exchange of the electronic part of the VBD without disconnecting the vertical bus flatcable.

  Jumpers J1 to J4 on the wiring part (10001/A/1) are used to set the VBD number.
  Jumpers J5 and J6 on the wiring part (10001/A/1) are used to set the Central Part (CP).

   Configurations with redundant Central Parts and non-redundant I/O require 10001/R/1 VBDs, because the relay on the 10001/R/1 disconnects the VBD from the vertical bus in case of a Central Part shutdown (via an on-board watchdog on the VBD or via software).

  The Honeywell 10001/R/1 Vertical Bus Driver is widely used in FSC-based safety systems within industries such as oil and gas, chemical processing, and petrochemical production. In these environments, the VBD provides a reliable communication backbone between the Central Part and multiple I/O racks distributed across control cabinets. Its support for redundant configurations ensures continued operation in the event of a single module failure. The short, defined bus distance and certified design help maintain system integrity in applications where operational safety and availability are mandatory.

   The vertical bus flatcable connects the vertical bus drivers (VBDs, 10001/1/1 or 10001/R/1) to the horizontal bus drivers (HBDs, 10100/1/1 or 10100/2/1). 

   The Honeywell 10001/R/1 Vertical Bus Driver is designed to support large-scale FSC system architectures while maintaining high reliability. Each VBD can connect up to ten Horizontal Bus Driver (HBD) modules, and up to fourteen VBDs can be installed in a single Central Part rack. This structure enables extensive I/O expansion without complex redesign. The controlled vertical bus length of up to 5 meters ensures stable signal transmission and predictable performance, making the module well suited for safety-critical systems that require consistent communication between the Central Part and distributed I/O racks.

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