HEIDENHAIN ERN1387.025-2048 727222-51 ERN 1387 series Encoder

1. Basic series: ERN1387

Type: Incremental encoder, which measures position, speed and direction by outputting pulse signals.

Application scenarios: Automation equipment that requires high-precision feedback, such as CNC machine tools, industrial robots, and servo drive systems.

2. Resolution and signal parameters: .025-2048

.025: may represent the shaft diameter specification, usually referring to the encoder shaft diameter of 9.525mm (common in Heidenhain taper shaft or cylindrical shaft design, such as 1:10 taper shaft adapted to Siemens motor).

-2048: The number of lines/pulses is 2048, that is, the encoder outputs 2048 sinusoidal signal cycles (or pulses) per rotation. After controller subdivision, higher accuracy (such as nanometer resolution) can be achieved.

3. ID number: 727222-51

Prefix 727222:

This model belongs to the Heidenhain low-end incremental encoder product line, which may be designed for specific industries (such as elevators, textile machinery), emphasizing cost-effectiveness and standardized interfaces.

Compared with the high-end series (such as models with ID starting with 749), there may be slight differences in protection level, signal type or material process.

Suffix 51:

Customized configuration identification, which may involve the following parameters (need to be confirmed in conjunction with official information):

Signal type:

Commonly 1Vpp sine/cosine analog signal (ERN1387 series typical output), used for analog systems requiring high resolution;

Or RS422 differential digital signal (A/B/Z phase), adapted to controllers that support digital input (such as PLC, motion control card).

Axis type: It may be a cylindrical shaft (non-tapered) or a tapered shaft of a specific length (need to match the motor shaft).

Cable/connector: Standard cable lengths (e.g. 5m, 10m) or custom interfaces (e.g. Heidenhain standard plug or M23 connector).

Protection rating: Typically IP64 (splash and dust proof), with some models being able to go up to IP67.