The Schneider Electric VW3A3424 is a High Threshold Logic (HTL) encoder interface module designed as an accessory for Altivar variable frequency drives (VFDs). It enables the connection and processing of HTL encoder feedback signals to the drive, improving speed and position regulation accuracy.
Parameters
Electrical
Product Type: Encoder interface module (HTL logic)
Encoder Type Supported: High threshold logic (HTL)
Rated Supply Voltage:
12 V DC
15 V DC
24 V DC
Maximum Supply Current:
0.20 A @ 12 V DC
0.175 A @ 15 V DC
0.10 A @ 24 V DC
Protection: Short‑circuit and overload protection
Maximum Operating Frequency: Up to 300 kHz (depending on spec source)
Signals & Connectivity
Input Signal Types Supported:
Push‑pull differential: A / AB / B
Push‑pull single‑ended: AB, A
Open collector differential: A / AB / B
Open collector PNP / NPN: AB, A
Connector Type: 1 removable spring terminal connector
Mechanical & Environmental
Maximum Cable Distance (Encoder to Module): ~500 m
Net Weight: ~0.15 kg
Typical Applications
Encoder feedback integration for Altivar drives in industrial automation
Improves speed accuracy, torque regulation, and dynamic response
Used in both flux vector control (FVC) and vector control with speed feedback (FSY) configurations with HTL encoders