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Calt Single-turn Absolute Rotary Encoder – 12-bit Resolution, 10mm Shaft

 

Product: Calt Single-turn Absolute Rotary Encoder
Price: $143.00
Place to Buy: Amazon.com
Description:
* Resolution of 4096 (12-bit) position codes per revolution
(repeats same 4096 position codes for each complete 360-degree revolution of the shaft)
* 10 mm shaft diameter, IP65 rated
* 60 mm body diameter, IP67 rated
* 2400 RPM maximum shaft speed
* -40 degrees C. to +80 degrees C. operating temperature
* Powered with +10 to +30 volts d.c.
* Current consumption approximately 110 mA
* Material Stainless Steel, Aluminum
* Weight approximately 0.86 lbs. (0.3 kg)
* Modbus RTU RS485 interface
* Direction and preset position are configurable over Modbus
* External reset to zero wire
* Cable is 8-conductor shielded, 39 inches (1 meter) in length

Cable Wire Color And Signal Name Table

Notes: To enable programming of the absolute encoder, connect BLUE wire to +V.
Connect GRAY wire to +V to cause an absolute position reset to zero.

Modbus RTU RS485 Compatible

The Calt single turn absolute rotary encoder is an inexpensive solution to applications requiring position retention even when system power is lost or off. It is compatible with Modbus RTU in that the encoder is the Slave and communicates with the system Master by way of an open, serial RS-485 protocol. This easy and widely used Modbus RTU protocol is used in Industrial Automation Systems (IAS) and Building Management Systems (BMS) applications.

The $143.00 price tag when you place your order at Amazon.com makes the Calt encoder a very affordable solution for your application.

Software Modbus RTU Master/Slave Command Examples

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

Read parameter command:
Programming permitted line connected with Power+
Host sends 01 03 00 44 00 02 84 1E
Note: 01 is encoder address ,
03H is command word , 00H 44H is the data address , 00H 02H of is data length , 84H 1EH is check code.
Slave back : 01H 03H 04H 00H 00H 00H 00H FBH 84H
Note: 01 is encoder address ,
03H is the command word , 04H is the data length , 00H 00H 00H 00H is the data , FBH 84H is check code.

Modify parameters command:
Programming permitted line connected to Power+
Host sends 01 10 00 44 00 02 04 00 00 00 00 F6 6C
Note: 01 is an encoder address,
10H is the command word, 00H 44H is the data address, 00H 02H is the data length, 04H is the byte length,
00H 00H 00H 00H parameter value (the first 00H is address bit, the high bit of the second 00H is baud rate, low is the direction, and the third and fourth 00H 00H is the resolution), F6H 6CH is check code.
Slave back : 01H 10H 00H 04H 00H 02H 01H DDH
Note: 01 is an encoder address ,
10H is the command word , 00H 04H is the data address , 00H 02H is the data length , 01H DDH is check code.

Parameter table

Hex code parameter Hex code parameter
01 4800bps baud rate 05 115200bps baud rate
02 9600bps baud rate 06 Clockwisedata increase
03 19200bps baud rate 07 Counterclockwise data increase
04 38400bps baud rate

Physical Dimensions And Mounting Holes Pattern

 

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Clark Ludahl

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