WIRELESS ENCODER TRANSMISSION SYSTEM

WENC2 Wireless Encoder System

Transmits encoder signals on rotating machinery over 5 GHz. End of slip-ring failures, cable fatigue and maintenance downtime.

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WENC2 Product
0:20 PRODUCT DEMO

See WENC2 in action

Wireless encoder transmission at 5 GHz. Real-time signal reproduction to the drive. Watch a 20-second walkthrough of the system.

5 GHz — Unlicensed ISM band, low latency
< 1 ms — Typical round-trip latency
100 m+ — Line-of-sight range
ENC1 M1 ENC2 M2 ENC3 M3 TRANSMITTER 5 GHz WIRELESS RECEIVER VFD INVERTER D1 1450 RPM 50.0 Hz RUN RDY ALM VFD INVERTER D2 1450 RPM 50.0 Hz RUN RDY ALM VFD INVERTER D3 1450 RPM 50.0 Hz RUN RDY ALM A B ENCODER SIGNALS (A/B) A B REPLICATED A/B SIGNALS 3× 3-PHASE POWER (UVW) CLOSED-LOOP ASYNCHRONOUS MOTOR CONTROL 3 SEPARATE MOTORS + ENCODERS → TX → 5 GHz → RX → 3 DRIVES → 3 MOTORS
0:20 PREVIEW
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Product Overview

WENC2 is a wireless transmitter-receiver system that carries motor encoder signals in industrial environments. The TX (transmitter) reads encoder inputs on the rotating side, and the RX (receiver) reproduces an identical quadrature signal for the drive — without any software or configuration change on the drive side.

It replaces the encoder cable in applications where pulling cable is difficult or impossible: rotating bobbins, rotary tables, slip-ring systems, multi-axis machines, crane drums, and more.

WENC2 TX Module

TX Transmitter Module

Mounted on the motor side, reads encoder signals

WENC2 RX Module

RX Receiver Module

Mounted at the drive cabinet, outputs quadrature A/B

How It Works

Read → transmit → reproduce — transparent to your drive

1. Encoder Reading (TX)

TX module reads the encoder A/B differential signals on the motor side with opto-isolated inputs.

2. Wireless Transmission

Data is sent peer-to-peer on the 5 GHz band with CCMP encryption and automatic channel hopping.

3. Signal Reproduction (RX)

RX regenerates identical HTL quadrature A/B at supply-tracking level. The drive sees a "real" encoder.

Key Features

Wireless
5 GHz dual-band module
Link Security
Paired MAC + CCMP
Range (LOS)
> 100 m open area
Motor RPM
0–3600 @ 1024 ppr
Encoder Input
Incremental quadrature A/B/~A/~B
Output Level
HTL 24 V, OC+SC protected
Max Pulse Freq
> 64 kHz
Connection Safety
Opto-isolated • Reverse / ESD

Model Options

Three variants, same wireless infrastructure

Basic

WENC2-S

Single Encoder (MONO)

  • 1 encoder channel (A/B)
  • 5 GHz wireless communication
  • TX: 1x 8-pin terminal
  • RX: 1x 8-pin terminal
  • Web interface
  • 2nd encoder channel
  • 3rd encoder channel
Ideal for single-encoder applications
Popular

WENC2-D

Dual Encoder (DUO)

  • 2 encoder channels (A/B)
  • 5 GHz wireless communication
  • TX: 1x 8-pin terminal
  • RX: 1x 8-pin terminal
  • Web interface
  • 3rd encoder channel
Recommended for most applications
Maximum

WENC2-T

Triple Encoder (TRI)

  • 3 encoder channels (A/B)
  • 5 GHz wireless communication
  • TX: 2x 8-pin terminal
  • RX: 2x 8-pin terminal
  • Web interface
For multi-shaft monitoring and full feature set

Technical Specifications

5 GHz Multi-Channel

Multi-channel wireless transmission on 5 GHz band, immune to industrial interference

5 GHz

3 Encoder Channels

Independent A/B phase inputs, multi-shaft monitoring support

3x A/B

Isolated Encoder Supply

Isolated encoder supply output on TX side (+23.5V)

TX Output

Wide Supply Range

10..30V DC, short-circuit, over-temperature and over-voltage protection

10~30V DC

Web Interface

Real-time monitoring over 5 GHz multi-channel — RSSI, temperature, 8 live charts

5 GHz AP

Parameters Table

ParameterTX (Transmitter)RX (Receiver)
Wireless Communication
Wireless Standard5 GHz multi-channel5 GHz multi-channel
Frequency Band5 GHz5 GHz
Data ProtocolPoint-to-pointPoint-to-point
ACK Rate—89 ~ 100 %
Frequency ManagementAutomaticAutomatic
AntennaExternal 5 GHz, 1.1 dBiExternal 5 GHz, 1.1 dBi
Input / Output
Encoder Input3 channels (A/B phase)—
Encoder Output—3 channels (protected)
Web Interface—5 GHz AP + HTTP
Electrical
Supply Voltage15–32 V DC (nominal 24 V)10–32 V DC (nominal 24 V)
Encoder Supply (Pin 3)+23.5 V filtered, 500 mA—
Max Transient Voltage40 V (pulse)40 V (pulse)
Reverse PolarityWithstands to −32 VWithstands to −32 V
Over-voltage Protection35 V varistor + fuse35 V varistor + fuse
ESD Rating±4 kV contact / ±8 kV air±4 kV contact / ±8 kV air
Power Consumption~0.3 W typical~0.3 W typical
Physical & Environmental
Enclosure (WxHxD)64.50 × 115 × 35 mm64.50 × 115 × 35 mm
Weight~120 g~120 g
MountingTS35 DIN rail + screwTS35 DIN rail + screw
IP RatingIP20 (higher on request)IP20 (higher on request)
Operating Temperature−20°C … +60°C−20°C … +60°C
Storage Temperature−40°C … +85°C−40°C … +85°C
Connector2× 8-pin terminal, 3.81 mm pitch2× 8-pin terminal, 3.81 mm pitch
Conductor0.22–0.75 mm² (AWG 24–18)0.22–0.75 mm² (AWG 24–18)

PPR / RPM Coverage

Transparent forwarding — pulse bandwidth scales with encoder PPR

WENC2 is transparent to the drive — it forwards encoder pulses unchanged. Pulse bandwidth is defined over 3600 RPM @ 1024 ppr. The upper RPM limit scales inversely with the pulse rate:

Encoder PPRUpper RPM Limit (approx.)Note
5127200 RPMHigh-speed applications
10243600 RPMStandard reference
20481800 RPMHigh-resolution positioning

When encoder PPR changes, only the drive parameter is updated. No setting required on WENC2.

Terminal Assignments

TX and RX pinout for all models

TX (Transmitter — Motor Side)

PinFunctionModel
1+24 V supply inputAll
2GNDAll
3+23.5 V encoder supply outputAll
4GND (encoder)All
5ENC0.AAll
6ENC0./AAll
7ENC0.BAll
8ENC0./BAll
9ENC1.AD, T
10ENC1./AD, T
11ENC1.BD, T
12ENC1./BD, T
13ENC2.AT
14ENC2./AT
15ENC2.BT
16ENC2./BT

RX (Receiver — Drive Side)

PinFunctionModel
1+24 V supply inputAll
2GNDAll
3GND—
4ENC0.AAll
5ENC0./AAll
6ENC0.BAll
7ENC0./BAll
8GND—
9ENC1.AD, T
10ENC1./AD, T
11ENC1.BD, T
12ENC1./BD, T
13ENC2.AT
14ENC2./AT
15ENC2.BT
16ENC2./BT

Note — 2-wire encoder: Only A and B are connected. On the TX side, /A and /B terminals are bridged to GND. On the RX side no bridging is done.

Connection Diagrams

Wiring schematics for all three models

WENC2-S TX wiring

WENC2-S TX

Single encoder, transmitter side

WENC2-S RX wiring

WENC2-S RX

Single encoder, drive side

WENC2-D TX wiring

WENC2-D TX

Dual encoder, transmitter side

WENC2-D RX wiring

WENC2-D RX

Dual encoder, drive side

WENC2-T TX wiring

WENC2-T TX

Triple encoder, transmitter side

WENC2-T RX wiring

WENC2-T RX

Triple encoder, drive side

Web UI (Service Mode)

Pair, monitor, diagnose and update — from any tablet or phone

SSID
WENC_XXXXXX (last 3 bytes of MAC)
Default Password
12345678 (change on first use)
IP Address
192.168.10.1
Browser URL
http://192.168.10.1

Live Monitoring

Real-time encoder rotation animation per channel. Instant RPM, Hz, direction (CW/CCW/Stop), RSSI with dBm value.

A/B Signal Diagnostics

Colored indicators show A and B signal levels. Green = HIGH, Red = LOW. Detect broken cables and wiring faults visually.

Pairing & Locate

Scan nearby TX units, create persistent pairing. "Locate Me" flashes device LEDs for 5 s to identify physical unit.

Restart Counter

Tracks short power interruptions. High TX count → poor slip-ring contact. High RX count → drive-side supply problem.

OTA Firmware Update

RX direct update. TX firmware uploaded wirelessly via RX proxy. Model compatibility checked automatically. Failed uploads roll back.

System Info

CPU temperature, firmware version & date, MAC addresses, last reset reason — both TX and RX visible at a glance.

Operating Modes

Normal Mode

Paired devices auto-connect on power up. Encoder data is transmitted in real time. RX reproduces identical quadrature. LEDs show signal strength.

Service Mode

RX opens a WiFi access point. Web UI access from tablet/phone. Live monitoring, pairing, settings and OTA firmware update.

LED Signal Strength

4-bar LED indicator shows real-time RSSI. D4 (25%) @ −85 dBm, D3 (50%) @ −70 dBm, D2 (75%) @ −55 dBm, D1 (100%) @ −40 dBm.

Secure Update (Anti-Rollback)

Automatic Rollback on Failure

After an OTA update, the new firmware must validate itself within 60 seconds. If validation fails (crash, error), the device automatically rolls back to the previous working firmware. Broken updates can never be installed in the field.

Model Compatibility Check

Firmware target model is validated before flash. Uploading wrong-model firmware is rejected — no manual checks needed.

Compliance & Certifications

CE-certified 5 GHz RF module

The wireless layer of WENC2 is based on a CE-certified 5 GHz dual-band RF module.

RF Module Certifications

🇪🇺 CE / RED
European Union

Currently certified with CE (European Conformity). Additional certifications (FCC, IC, MIC, SRRC, KCC, ANATEL) are in the roadmap and will be added as they are obtained.

Troubleshooting Reference

Quick diagnostic guide

SymptomPossible CauseSolution
LEDs not litNo power or no signalCheck supply (10–30 V). LEDs off = no link.
Pairing failsDevices not in service modePut both devices into service mode (Knight Rider animation).
Web UI doesn't openWrong WiFi or mobile dataConnect to SSID WENC_XXXXXX, disable mobile data.
Encoder turning but no countCable fault or RX in serviceUse A/B diagnostics in Web UI. Return RX to normal operation.
Direction invertedA/B orderInvert at drive, or swap A/−A (4-wire), or swap ENC.A/ENC.B on TX (2-wire).
All indicators redEncoder power missingCheck supply; on 2-wire verify /A, /B → GND bridge on TX.
Indicators don't changeBroken signal wireCheck corresponding A or B line.
Position oscillates ±1Wrong wiringVerify A/B/~A/~B connection order.
Frequent restartsSlip-ring or supply issueCompare restart counters. TX inc → slip-ring; RX inc → drive supply.
Not working after OTABroken firmwareAuto-rollback restores previous version within 60 s.

Order Information

Order Codes

Order CodeChannelsContents
WENC2-MONO (S)1 encoder1 × TX + 1 × RX pair
WENC2-DUO (D)2 encoders1 × TX + 1 × RX pair
WENC2-TRI (T)3 encoders1 × TX + 1 × RX pair

Standard Package Contents

  • 1 × TX transmitter module
  • 1 × RX receiver module
  • 2 × external 5 GHz antennas (1.1 dBi)
  • 4 × 8-pin 3.81 mm pluggable screw terminal sockets
  • Cardboard packaging

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