Type designation for encoders from SEW‑EURODRIVE

The type designation of SEW-EURODRIVE encoders consists of 4 characters, e.g. EI8R, and is included in the type designation of the motor.

1st digit: encoder design

Identifier	Description
A	Multi-turn absolute encoder
E	Single-turn absolute encoder or incremental encoder
N	Low resolution proximity switch and incremental encoder
R	Resolver
X	Special encoderSpecial encoder with functions for customer-specific applications.

2nd digit: tool flange to the motor

The add-on encoder is mounted to the motor on the B-side by means of various tool flanges. The interface to be used depends on the motor size or the selected option.

Identifier	Description
K	Cone shaft (shaft centered)
V	Solid shaft with coupling (flange-centered with flange cover)
H	Hollow shaft (shaft centered)
I	Built-in encoder, integrated in the motor without additional length
F	positive
L	linear
S	Spread shaft (shaft centered)
G	Plug-in shaft (shaft centered)

3rd digit: key figure for the generation of the encoder/type

Identifier	Description
9	Built-in encoders of the high class or add-on encoders of the medium and high class of the second generation
8	Built-in encoders of the medium class or add-on encoders of the medium and high class of the second generation
7	Built-in encoders of the basic class or add-on encoders of the medium and high class of the first generation
1 – 6	various geometric variants
0	Special design

4th digit: electrical interface of the encoder

Identifier	Description
1 – 6	Signal periods per revolution
A	Design as mounting adapter (see chapter Encoder mounting adapter)
C	HTL (with or without index track) at typically U_B = 9 – 30 V
H	Sin/cos + RS485 HIPERFACE^® (multi‑turn)
L	Resolver signal
M	Resolver signal
R	TTL (RS422) at typically U_B = 9 – 30 V
S	Sin/cos + RS485 (optional)
T	TTL (RS422) at U_B = 5 V
W	Sin/cos + RS485 (single-turn or multi-turn)
X	Adjustable interface and/or resolution or special interface
Y	Sin/cos or TTL(RS422) + SSI (multi-turn)
Z	MOVILINK^® DDI