1. Product Overview

Product Name: FSC 10100/2/1
Brand: Honeywell
Series / Family: FSC (Fail‑Safe / Control Bus / I/O Interface Modules)

The FSC 10100/2/1 is a bus driver / horizontal bus module in the FSC system architecture. Its role is to interface the central processing/backplane system with horizontal I/O racks, distributing address, power, and control signals horizontally across the I/O modules. It ensures communication between the central part of the controller and peripheral I/O modules over horizontal bus lines.

Because the module must ensure integrity of bus signals over distances and among multiple racks, it offers features like low ripple, noise rejection, and fault detection.

2. Technical Specifications

Below is a table summarizing known and reasonably inferred specifications for FSC 10100/2/1:

Notes / context:

• The module is part of the “Horizontal Bus Driver (HBD)” set within FSC backplane architecture.

• The data about current consumption (35 mA vs 65 mA) is derived from descriptions of cable variant usage.

• The dimension “2.0 × 8.0 × 5.0 in” is based on a listing converting inches to mm.

• The weight of ~0.1 kg is from product listings of bus driver modules of this type.

• Ripple spec (< 50 mV p‑p) ensures bus integrity by limiting voltage noise injected into bus lines.

• The operating temperature spec (–40 to +70 °C) is consistent with industrial control environment ratings.

3. Applications

The FSC 10100/2/1 module is designed for use in distributed control / safety systems. Typical application scenarios include:

• Serving as a horizontal bus driver module linking the central control rack to remote I/O racks

• Distributing address, control, and status signals to I/O modules placed across multiple physical racks

• Supporting redundant I/O communication paths (using A21 / A22 cables)

• Acting as the signal conditioning interface to maintain bus signal integrity over longer distances

• Ensuring communication continuity in systems where multiple I/O racks must be controlled from a central logic processor

• In safety instrumented systems (SIS), coordinating with central logic modules to maintain safe data transfers, error detection, and fault propagation

Because the module is in the path of all I/O traffic, its reliability and signal integrity are critical to the proper functioning of the overall control and safety system.

4. Advantages & Strengths

• Bus Signal Driving Capability: It ensures that address and control signals from the central rack are reliably driven over horizontal bus lines, even across multiple racks or longer distances.

• Low Ripple / Low Noise: By maintaining less than 50 mV p‑p ripple, the module minimizes electrical noise injection, which helps reduce data corruption or spurious indications.

• Support for Redundancy: It can work with different cable variants (A1, A21, A22) enabling redundant configurations in fault-tolerant systems.

• Compact & Lightweight: At ~0.1 kg and moderate dimensions, it does not impose heavy structural demands on the rack.

• Industrial Temperature Range: Operating from –40 °C to +70 °C allows deployment in harsh environments.

• Backplane Compatibility: It fits into the FSC backplane architecture, using standard TE/HE rack space and address jumpers.

• Fault Detection / Diagnostics: The module includes internal error detection, and in case of detected faults it can isolate or shut down the bus communication, preserving system integrity.

• Simplifies System Layout: By centralizing bus driving, the module helps maintain bus signal quality and manage distances to I/O modules without requiring custom drivers at each I/O rack.

5. Related / Same‑Series Models & Popular Honeywell Modules

A) Five Related / Variant Models in the FSC / Bus Driver / I/O Driver Family