B&R X20 SI 4100 Safe Digital Input Module – SIL 3 / PL e

The X20 SI 4100 is a safety digital input module from the B&R X20 SafeIO series. It provides four Type A digital inputs (24 VDC) and four pulse outputs for sensor line diagnostics, supporting the highest safety integrity level (SIL 3 per IEC 61508, PL e / Cat. 4 per EN ISO 13849-1). The module is designed for integration into X20 systems with the appropriate safety bus base (X20BM33 or X20BM36) and safety terminal block (X20TB52).

Key Features:

· 4 safe digital inputs (Type A, 24 VDC)
· 4 diagnostic pulse outputs (for sensor line monitoring)
· Safety rating: SIL 3 (IEC 61508), PL e / Cat. 4 (EN ISO 13849-1)
· Input filter: Hardware ≤150 µs, software configurable 0–500 ms
· Bus interface: X2X Link
· Power supply: 24 VDC (-15% / +20%)
· Power consumption: 0.32 W (bus), 1.25 W (internal I/O)
· Operating temperature: 0°C to +60°C (horizontal installation)
· Protection class: IP20
· Module width: 25 mm (2.5 cm)

Applications:

· Emergency stop circuits
· Safety doors and guards
· Light curtains and two-hand controls
· Machine safety monitoring
· Process safety in industrial automation

Compatibility:
Requires a safe X2X Link bus module (X20BM33 or X20BM36) and a safe terminal block (X20TB52) for proper safety operation. Compatible with B&R X20 systems supporting safe I/O.