6ES7450-1AP00-0AE0 S7-400 High-Speed Counter Module | 2-Channel 500kHz

Product Overview

• Siemens 6ES7450-1AP00-0AE0 – FM 450-1 counting function module for S7-400
  • Provides 2 high-speed counter channels
  • Includes configuration package on CD
  • Handles incremental encoders and 24V initiators
  • Counts up to 500 kHz with RS422 signals

Key Technical Specifications

• Brand & Model
  • Brand: Siemens
  • Model: 6ES7450-1AP00-0AE0
  • Series: SIMATIC S7-400
  • Product Type: FM 450-1 Function Module
• Supply Voltage
  • Rated voltage: 24 V DC (1L+ and 2L+)
  • Range: 20.4 V to 28.8 V DC (dynamic 18.5-30.2 V)
  • Reverse polarity protection: Yes
  • Backplane current: max 450 mA at 5 V DC
• Counter Inputs
  • Number of counters: 2 channels (32-bit or ±31-bit)
  • 5V RS422 counter input: max 500 kHz
  • 24V counter input: max 200 kHz
  • Differential input voltage: min 0.5 V (RS422)
  • Terminating resistor: 220 Ω
• Encoder Compatibility
  • Incremental encoder (symmetrical) – 90° phase shift
  • Incremental encoder (asymmetrical)
  • 24V initiator (proximity switch)
  • 24V directional element (pulse + direction)
• Digital Inputs (6 channels)
  • Functions: Gate start, gate stop, counter set
  • Signal “1”: +11 to +28.8 V
  • Signal “0”: -28.8 to +5 V
  • Input frequency: max 200 kHz
  • Input delay: parameterizable (2.5 µs to 25 µs)
• Digital Outputs (4 channels)
  • Short-circuit protection: Clocked electronically
  • Rated current: 0.5 A per output
  • Output delay: max 300 µs
  • Inductive shutdown limit: 2L+ (-39 V)
• Encoder Supply Outputs
  • 5V encoder supply: 5.2 V ±2%, max 300 mA (short-circuit protected)
  • 24V encoder supply: 1L+ (-3 V), max 300 mA (short-circuit protected)
• Diagnostics & Status
  • Diagnostic functions: Yes
  • Diagnostic alarm: Parameterizable
  • Hardware interrupt: Parameterizable
  • Status LEDs: 14 green (CR, DIR, inputs, outputs)
  • Diagnostic LEDs: 2 red (internal/external errors)
• Isolation
  • Channels to backplane: Optocoupler isolated
  • Test voltage: 500 V AC
  • Potential difference: 75 V DC / 60 V AC
• Physical Details
  • Required front connector: 1x 48-pin
  • Width: 25 mm
  • Height: 290 mm
  • Depth: 210 mm
  • Weight: approx. 650 g
• Power Loss
  • Typical: 9 W

Expert Review

• Field Engineer’s Insight: The FM 450-1 handles high-speed counting up to 500 kHz with RS422 encoders. I recommend this module for positioning and length measurement tasks. Use the 24V inputs for standard proximity switches up to 200 kHz. The configurable input delay helps filter noise in harsh environments. Always use shielded cables for encoder connections. The diagnostic LEDs save troubleshooting time when issues occur. This module works best with Siemens S7-400 CPUs in motion control applications.

Compatibility & Applications

• Compatible Systems
  • Siemens SIMATIC S7-400 PLC systems
  • Works with all S7-400 CPUs (e.g., 414, 416, 417)
  • Fits standard S7-400 rack (UR1, UR2, CR2)
  • Requires 1x 48-pin front connector
• Suitable Applications
  • High-speed counting and positioning tasks
  • Length measurement on conveyor systems
  • Speed monitoring for rotating machinery
  • Pulse counting from flow meters or encoders
  • Motion control with incremental encoders

Installation & Maintenance Tips

• Use shielded twisted-pair cables for encoder connections.
• Set input delay filters to match your encoder frequency.
• Configure gate start/stop inputs for precise counting windows.
• Monitor diagnostic LEDs for quick fault identification.
• Keep 5V encoder cable runs under 25 meters to maintain signal quality.
• Use the configuration package on CD for easy setup.

Package Contents

• 1x Siemens 6ES7450-1AP00-0AE0 FM 450-1 module
• 1x Configuration package on CD
• Shipping: 12-24 hour dispatch via FedEx, UPS, or DHL

Compare with Similar Models

• 6ES7450-1AP00-0AE0 – FM 450-1, 2 channels, 500 kHz
• 6ES7450-1AP00-0AE0 – Same module with configuration CD
• 6ES7451-1AP00-0AE0 – 4-channel counter module
• 6ES7350-1AH03-0AE0 – S7-300 counter module (lower speed)

Frequently Asked Questions

• Q: What encoders work with the 6ES7450-1AP00-0AE0?
  • A: RS422 incremental encoders (5V) and 24V initiators or directional elements. Both symmetrical and asymmetrical types work.
• Q: What is the maximum counting frequency?
  • A: 500 kHz with 5V RS422 encoders. For 24V inputs, the max is 200 kHz.
• Q: Does this module include encoder power supply?
  • A: Yes. It provides 5V (300 mA) and 24V (300 mA) encoder supplies with short-circuit protection.
• Q: How do I filter noise on the counter inputs?
  • A: Use the configurable input delay. Set it to 25 µs for 20 kHz signals or 2.5 µs for 200 kHz signals.
• Q: What do the diagnostic LEDs indicate?
  • A: Two red LEDs show internal and external errors. Green LEDs show status of CR, DIR, inputs, and outputs.

Selection Guide

• Choose 6ES7450-1AP00-0AE0 for 2-channel counting up to 500 kHz.
• Need 4 channels? Select 6ES7451-1AP00-0AE0 instead.
• For S7-300 systems, use 6ES7350-1AH03-0AE0.
• Warranty: 12 months against manufacturing defects.

Contact & Support

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825
• Technical support available in English and Chinese

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