Siemens Digital Input Module SIMATIC DP 4/8 F-DI PROFIsafe 6ES7138-4FA05-0AB0

Siemens Digital Input Module SIMATIC DP 4/8 F-DI PROFIsafe 6ES7138-4FA05-0AB0

Module Overview

Product: Siemens SIMATIC DP – ET 200S
Model Number: 6ES7138-4FA05-0AB0
Function: Failsafe digital input module (F-DI) with 4 or 8 channels, designed for safety-related automation tasks using the PROFIsafe protocol.
Use Case: Provides reliable acquisition of safety signals (e.g., emergency stops, guards, light curtains) in distributed I/O environments.
Safety Standards:

• Performance Level: PL e (ISO 13849-1)

• Safety Integrity Level: SIL 3 for two-channel, SIL 2 for single-channel (IEC 61508)

• Supports PROFIsafe communication over PROFIBUS or PROFINET (with IM 151-3 HF). 

Electrical Specifications

Supply & Power

• Rated supply voltage: 24 V DC.

• Typical power loss: ~4 W.

Digital Inputs

• Number of inputs: 8 digital inputs (configurable:
  • 8 one-channel
  • 4 two-channel for higher safety redundancy).

• Input type: DC, compliant with IEC 61131 Type 1.

• Rated input voltage: 24 V DC.

• Input current (signal “1”): ~3.7 mA typ.

• Parameterizable input delay:
  • 0.3 ms (min) to 17 ms (max) for transitions both 0 → 1 and 1 → 0.

• Maximum cable length (shielded/unshielded): up to 500 m.

Encoder / Sensor Supply

• Number of outputs: 2 supply outputs (for sensor/encoder feeding).

• Output voltage: min. L+ (-1.5 V).

• Short-circuit protection: Electronic, threshold ~0.7 A to 1.8 A.

• Rated output current: 300 mA per output (0–300 mA).

Addressing & I/O Area

• Input address area: 6 bytes.

• Output address area: 4 bytes (for diagnostic/status).

Diagnostics & Indicators

• Diagnostics and alarm functions: Yes — diagnostic information is readable.

• Diagnostic alarm: Yes.

• Short-circuit detection: Yes.

• Status LEDs:

  • Group error (SF) — red

  • Input status — green

Safety & Isolation

• Safety classification: Up to PL e according to ISO 13849-1.

• SIL rating: Up to SIL 3 (IEC 61508) when used in dual-channel.

• Potential separation:

  • Between digital inputs and backplane bus — yes

  • Between channels — no galvanic isolation

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Physical & Mechanical

• Width: 30 mm.

• Height: 81 mm.

• Depth: 52 mm.

• Weight: ~78 g.

• Mounting: DIN-rail compatible (ET 200S mounting concept).

Applications & Integration

• Designed for safety-relevant digital input acquisition in industrial automation systems using the SIMATIC ET 200S modular platform.

• Typically used with failsafe CPUs and safety control applications (e.g., emergency stops, safety interlocks).

• Suitable for PROFIsafe over PROFIBUS or PROFINET with the appropriate interface/base unit.

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