Siemens 6ES5417-7AA21 SIMATIC S5 417 relay digital output module

Siemens 6ES5417-7AA21 SIMATIC S5 417 relay digital output module is documented for the stated industrial system role.

System function

Rebuilt from individual evidence

System position

Siemens SIMATIC S5 417 digital output module with galvanic isolation through relays.

Controls field output switching by providing 8 relay outputs for switching 30 V DC to 250 V AC loads at up to 5 A.

The system position is an inference from the documented component function and adjacent interfaces.

Unknown: terminal wiring, load type, installed hardware condition, and compatibility with a particular S5 rack.

Exact reference: 6ES5417-7AA21
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function: Controls field output switching by providing 8 relay outputs for switching 30 V DC to 250 V AC loads at up to 5 A.
System position: sits between the S5 controller output image and field actuators in the discrete output layer.
Upstream / inputs: Receives output states from the S5 controller.
Downstream / outputs: Switches connected AC or DC field loads through relay contacts.
Limitations: Unknown: terminal wiring, load type, installed hardware condition, and compatibility with a particular S5 rack.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

Siemens SIMATIC S5 417 digital output module with galvanic isolation through relays.
Confidence: high
- adegis.com — retrieved 2026-09-12; high confidence
Provides 8 relay outputs for switching 30 V DC to 250 V AC loads at up to 5 A.
Confidence: high
- adegis.com — retrieved 2026-09-12; high confidence

Inferences

Inferred system position: sits between the S5 controller output image and field actuators in the discrete output layer.
Confidence: high
Rationale: The exact-reference evidence establishes the component identity and documented function; its relationship to adjacent system layers is therefore marked as an inference.
- adegis.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: terminal wiring, load type, installed hardware condition, and compatibility with a particular S5 rack.
Confidence: low
Missing evidence: The individual lookup does not capture the installed unit, wiring, configuration, or site-specific compatibility.

System position diagram

A system diagram places Siemens 6ES5417-7AA21 SIMATIC S5 417 relay digital output module between the upstream system and downstream field layer; the placement is marked as an inference. — The component position is inferred from its documented function and the adjacent system layers.

View Mermaid source

flowchart LR; Upstream["Upstream system"]-->Module["6ES5417-7AA21"]; Module-->Downstream["Downstream field layer"]

View diagram labels

Nodes: Upstream system; 6ES5417-7AA21 SIMATIC S5 417 relay digital output module; Downstream field layer
Edges: Documented signal or power path; Inferred system connection

Next action

The captured evidence supports the exact identity and documented system role for 6ES5417-7AA21.

Confirm the target rack, wiring, load, configuration, and installed condition before replacement or commissioning.

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