Modbus RTU Output Single-turn Absolute Encoder CAS38 Series

  • Standard Modbus RTU protocol, single-turn absolute encoder
  • Multiple resolutions are available, such as 12-bit, 14-bit, 16-bit, etc.
  • 38mm outer diameter, Clamping flange, servo flange or blind hollow shaft, the international standard structure
  • A “magnetic detection mode”, with excellent impact and vibration resistance
  • Programmable, intelligent absolute value encoder; professional setting software, convenient for user operation
  • Wide operating voltage, low current consumption
  • External reset wire to set the default location, easy installation, no need to find ZERO.


Operating Voltage10-30Vdc or 5Vdc  polarity protection
Current Consumption< 40Ma   (24V power supply)  no load
Output Signal

Modbus RTU outpu, Settable for length/ angle /velocity measurement

Linearity Resolution1/4096FS or 1/16384FS

Repeatability Precision

Signal adjustment

Repeatability ±2BIT( Actual precision related with installation and shaft concentricity.)   Resolution or direction settable, external setting line preset functiion.
Operating Temperature-40—75℃     Programming temperature range:0℃~+70℃

Storage Temperature

Protection class

Vibration & shock


IP67 for housing      IP65 for shaft


Permissible Rotation Rate2400rpm
Connection Cable1m 8-core shielded cable.
Overall FeatureClamping flange or synchronous flange, metal enclosure, sealed dual-bearing structure ( see attached drawing of overall dimension)

Modbus RTU Factory Parameters

Function code


Baud rate











Reset command
Host sends 01H 05H 00H 00H check code
Slave reply: 01H 05H 00H 00H check code

Read the measurement data commands
Host sends 01 04 00 01 00 02 20 0B
Note: 01 is encoder address , 04H is function code , 00H 01H is the data address , 00H 02H is data length , 20H 0BH is check code.
Slave reply: 01H 04H 04H 00H 00H 01H 00H FAH 14H
Note: 01 is encoder address, 04H is the function code, 04H is the data length, 00H 00H 01H 00H is the data, FAH 14H is check code.

Installation dimensions (mm)

Clamping flange (default)

synchro flange

Blind hollow shaft

Featured software

By the professional PC setting software provided by CALTSENSOR, you can easily modify the counting direction, working mode, address, baud rate, resolution, and reference bit of the encoder;  and Observe the current encoder data in real time.

If needed, please click this button to download the associated software.

Tell us about your requirements, our engineers will help find the right sensors for you!


There are no reviews yet.

Be the first to review “Modbus RTU Output Single-turn Absolute Encoder CAS38 Series”

Your email address will not be published. Required fields are marked *

Customize your Own sensors

Just write down some details and our our customer service get back to you in a jiffy!