Honeywell 10101/2/1 FSC Fail‑Safe Digital Input Module
June 01, 2026

Honeywell 10101/2/1 FSC Fail‑Safe Digital Input Module

Product Overview The 10101/2/1 is a 16‑channel fail‑safe digital input module for Honeywell FSC systems, designed for safety‑critical industries such as petrochemical and power generation. It features intrinsic fail‑safe behavior: any single fault forces the input circuit to a “safe state” (power‑off / low level), complying with SIL 3 safety level requirements.

Description

Model Number Explanation

10101: FSC digital input module series

2: 16 channels, 24VDC input

1: Standard version with diagnostics

Technical Specifications

Number of Channels: 16 independent isolated inputs

Rated Input Voltage: 24 VDC; max 36 VDC

Input Current: 7 mA per channel @ 24 VDC

Logic Levels: HIGH >15 VDC; LOW <9 VDC

Response Time: 10 ms (input filtering)

Power Supply:

Backplane: 5 VDC / 8 mA

External: 24 VDC / 110 mA

Isolation: 1500 VAC (channel‑to‑backplane); channel‑to‑channel isolated

Dimensions: 4TE × 3HE (≈22.5 × 110 × 120 mm)

Weight: 0.2 kg

Operating Temperature: 0°C to +60°C

Certifications: CE, UL 508, TÜV (SIL 3)

Interface & Configuration

Connector: Front 2×16‑pin screw terminals

LED Indicators: 1 per channel (status); module run/fault LEDs

Configuration: Channel parameters, filter time, safety logic defined via FSC system software.

Key Features

Fail‑Safe Input: Hardware‑level fault‑to‑safe, meets SIS design principles.

High Density: 16 channels saves rack space and cost.

On‑Line Diagnostics: Real‑time detection and reporting of wire breaks, short circuits, overvoltage.

Redundancy Compatibility: Supports dual‑module redundant configuration with bumpless switchover.

Hot‑Swap: Online replacement without system shutdown.

Applications

Systems: Honeywell FSC, Experion PKS C200/C300 SIS.

Industries: Oil & gas, chemical, power generation, pharmaceuticals.

Use Cases: Emergency stop buttons, limit switches, valve position feedback, safety barrier contact inputs.

Compatibility

Racks: FSC 10000‑series I/O racks.

CPU Modules: 10002/1/1, 10002/1/2.

Firmware: FSC firmware ≥ v2.78; configuration tool ≥ v530.


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