MeloAuto-Trusted PLC & DCS Parts Supplier
This digital output module controls high-current actuators for SIMATIC S5 systems. It switches 8 relay outputs independently for AC or DC loads. You can replace individual relays without removing the entire module.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand | Siemens |
| Model | Siemens 6ES5417-7AA21 |
| Category | Digital Output Module (SIMATIC S5 Series) |
| Dimensions (H x W x D) | 250 mm x 25 mm x 210 mm |
| Weight | 0.92 kg |
| Number of Outputs | 8 channels |
| Output Type | Relay (Form A, normally open) |
| Contact Rating | 2 A at 250 V AC / 2 A at 30 V DC |
| Total Current per Module | 8 A (maximum across all relays) |
| Switching Delay | 10 ms (typical) |
| Mechanical Life | 10 million operations |
| Electrical Life | 100,000 operations at rated load |
| Internal Components | 8 relays + 8 suppression diodes + 1 PCB assembly |
| Interface Type | 48-pin front connector |
| Isolation | 1500 V AC between coils and contacts |
| Power Supply | 5 V DC from backplane + external supply for loads |
| Current Draw (5V) | 200 mA typical |
| Built-in Energy Storage | None (relays provide intrinsic isolation) |
| Protection Features | RC snubber recommended for inductive loads |
| Operating Temperature | 0°C to 60°C |
Detailed Feature Overview
This module uses 8 independent relays for output switching. Each relay handles up to 2 A at 250 V AC or 30 V DC. Consequently, you can control motors, heaters, or solenoid valves directly.
The mechanical life reaches 10 million operations under ideal conditions. For resistive loads, expect 100,000 electrical cycles reliably. The switching delay of 10 ms suits most industrial applications.
You will find suppression diodes across each relay coil. These diodes prevent back-EMF from damaging the driving circuitry. However, add external RC snubbers for inductive AC loads.
Installation and Compatibility
Siemens 6ES5417-7AA21 fits S5 racks like 6ES5950-xxxx. Connect your load supply independently from the logic supply. Always use fuses on each output for short-circuit protection.