Product Overview

SIMATIC S7-300 Counter Module FM 350-1 – 6ES7350-1AH03-0AE0
High-speed counter module for the S7-300 PLC platform. Supports one channel compatible with both 5 V and 24 V incremental encoders, and offers countering up to 500 kHz. Includes isochronous mode and comes with a configuration CD package.

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Technical Specifications
Attribute Details
Counter Functionality 1 channel, up to 500 kHz
Encoder Compatibility 5 V differential (RS-422) & 24 V incremental encoders
Isochronous Mode Supported – for synchronous operation
Analog Supply & Ratings Supply voltage: 24 V DC (20.4–28.8 V), dynamic range to 30.2 V; Power loss: typically 4.5 W
Encoder Supply Outputs 5 V at 300 mA; 24 V at 400 mA
Digital Inputs 3 (Start, Stop, Set); each 24 V, ~9 mA
Digital Outputs 2 (DO0, DO1), opto-isolated, 0.5 A (max 0.6 A), short-circuit protected
Front Connector Functions Encoders, start/stop/set inputs, outputs, encoder voltages, and load voltage
Digital Isolation Encoder signals not isolated; DI/DO optically isolated from S7 backplane

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Product Lifecycle & Ordering Info

Lifecycle Status: Phase-out effective since October 1, 2023 (PLM: PM400)

Availability: Lead time approximately 1 day (ex-works)

Net Weight: ~0.285 kg

Packaging Dimensions: 13.10 × 15.00 × 5.10 cm

Country of Origin: Germany

RoHS Compliance: Since March 31, 2008

Environmental and Regulatory Compliance: WEEE take-back applies; Contains Lead (REACH >0.1% w/w)

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Engineering Insight

High-Speed Counting & Precision
Handles up to 500 kHz with both encoder voltage options and isochronous timing—ideal for rapid, high-resolution feedback systems (e.g., packaging, motion tracking).

Comprehensive Signal Handling
Offers robust digital I/O for gating and direct output control, plus onboard encoder supply for simplified wiring.

Diagnostic Readiness
Although lacking detailed per-channel diagnostics, module supports essential functions and integrates via configuration CD; status LED indicators assist setup and troubleshooting.