The ZeroErr eCoder20 is an axial-reading absolute magnetic encoder with RS485 single-turn and multiple-turn versions. Selectable resolutions are 17-bit and 19-bit. The encoder uses a 20 mm through-hole and an 8-pin connection; maximum speed for eCoder20 is stated as 12,000 RPM.
Features
Maximum absolute tolerance: <0.06°; hysteresis: less than one unit of resolution.
20 mm through-hole for passing mechanical structures, cables, air lines, and similar items.
90° M2.5 setscrew mounting with a specified Φ20 mm mounting opening.
Compact structure designed for assembly and disassembly; assembly tolerance up to 0.1 mm.
Programmable zero position stored in internal EEPROM.
Provides a precision positioning reference for fast, accurate installation.
RS-485 interface protocol, stated as compatible with Tamagawa absolute encoders.
Stated compatibility with servo, linear, DDR (direct-drive rotary), coreless, and voice-coil motors.
Options
Selection
Available choices
Version
Absolute value of a single lap (RS485); Absolute value of multiple turns (RS485)
19-bit multiple-turn version: stated to provide up to 19-bit resolution, 240 counting revolutions, programmable and storable point-by-point position compensation, and ±10 arcseconds repeatability. The multiple-turn version is described as a non-contact, multi-turn absolute type.
Specifications
Operating and electrical specifications
Parameter
Value
Model
eCoder20
Maximum absolute tolerance
<0.06°
Repeatability
±10 arcseconds
Reading type
Axial reading
Resolution
17 bit to 21 bit and 16 bit multiturn counter option
105 mA to 125 mA (eCoder11, eCoder18, eCoder20); 70 mA to 90 mA (eCoder35, eCoder45, eCoder65); 115 mA to 130 mA (eCoder35H)
Connector
8-pin connection
Battery standard voltage
3.6 V
Battery warning voltage
<3.05 V
Battery operating current
4 μA
Storage temperature
-40 to +105 °C
Operating temperature
-40 to +105 °C
External magnetic field
±20 mT
eCoder20 dimensions and component data
Parameter
eCoder20
Magnetic ring inner diameter
20 mm
Magnetic ring outer diameter
33.5 mm
Magnetic ring weight
9.2 g
Magnetic ring thickness
6.4 mm
Readhead inner diameter
22 mm
Readhead outer diameter
34 mm
Readhead weight
3.6 g
Readhead maximum thickness
6 mm
Readhead arc length
360°
Maximum resolution
19 bits
Maximum thickness (feature panel)
12.8 mm
Installation drawing callouts
Callout
Value
Diameters
Φ33.5, Φ27, Φ22, Φ20
Linear dimensions
37.5, 34, 30.5, 20.5, 19.2, 16.5, 15, 12.9, 4.75
Toleranced dimension
4 ±0.2
Holes
Two Φ2.1 holes
Angle
90°
Applications
The eCoder20 is stated to remain applicable in dusty, heavy-oil-contamination, high- and low-temperature, and complex electromagnetic environments, with reliable operation in harsh environments.
The encoder board has a multi-pin board connector. The product is identified as an eCoder20 Absolute Encoder.
Features and Design
The encoder has a 20 mm through-hole. Maximum thickness is 12.8 mm.The 19-bit multiple-turn absolute encoder provides up to 19-bit resolution and 240 counting revolutions. The stated encoder repeatability is ±10 arcseconds.Assembly tolerance is up to 0.1 mm. The programmable zero position is stored in internal EEPROM.
Setup and Use
The encoder uses 90° M2.5 setscrew mounting. The mounting graphic specifies a Φ20 mm opening.
Application Examples
The allowable speed is up to 12,000 RPM. The encoder supports servo motors.
Interfaces and Connections
The encoder supports the RS-485 interface protocol. The encoder uses a standard RS-485 protocol compatible with Tamagawa absolute encoders.
Dimensions and Construction
The installation drawing specifies an overall outside diameter of Φ33.5. The installation drawing specifies a Φ27 diameter.