MM-EM08-012

Magnetic incremental feedback, 12 ppr on 2 channels, TTL compatible.

Class: Magnetic incremental
Lifecycle: active
Revision: A
Review: Verified record
Sample: Quoted with the configuration
Lead time: Quoted with the configuration
Verified: 2026-08-18

Envelope and model

Side elevation of MM-EM08-012, drawn to scale from the published envelope ⌀8.0 mm and the reviewed model depth. The connector, the cable exit and every tolerance are governed by the controlled drawing.

Model bounding box, X × Y × Z: 7.8 mm × 7.8 mm × 11.0 mm
Model revision: A, reviewed 2026-08-18
Mesh: 172 triangles

Reviewed specifications

Supply, signal, resolution and limits.

MM-EM08-012 specifications
Specification	Value	Basis	Note
Encoder type	Incremental	Published
Sensing element	Magnetoresistive effect element	Published
Envelope diameter	8mm	Published
Resolution	12ppr	Published
Channels	2	Published
Output signal	TTL compatible	Published
Supply voltage	5.0V	Published
Supply tolerance	5%	Published
Supply current, maximum	20mA	Maximum
Output current, maximum	3mA	Maximum
Maximum frequency	20kHz	Maximum
Operating temperature, minimum	-10°C	Published
Operating temperature, maximum	60°C	Published
Cable	AWG28 flat band cable	Published
Index channel	Not published	Not established	Ask for it in a fit review.

The frequency limit sets the top speed.

Not the resolution. Counts per revolution and the output frequency limit together fix the shaft speed this feedback can follow.

n_max = f_max ÷ P × 60 = 20,000 Hz ÷ 12 ppr × 60 = 100,000 rpm

n_max: shaft speed at which one channel reaches the frequency limit
f_max: maximum output frequency, 20 kHz, a published maximum
P: pulses per revolution

The motor's own no-load speed is normally the binding limit, not this number. Check both against the shaft the encoder is mounted on.

Compatible parts

Application fit and cautions

Read out of this record's own numbers.

Caution

Cautions for this record

12 pulses per revolution on 2 channels gives 48 counts per revolution with 4× quadrature decoding at the motor shaft. Behind a reduction the count at the output is that number multiplied by the ratio, but backlash, not counts, sets the real positioning error.
No index channel is established on this record, so an absolute home position needs an external reference or a homing move.
AWG28 flat band cable carries the signal. Route it away from the motor leads: a brushed motor on the same harness is the usual source of counting errors.

Documents, models and next steps

Free and ungated

This specification record is free to read, index and quote, with no form in front of it. You should not have to trade personal data for enough information to reject a product.

A sanitized browser model (GLB, revision A, reviewed 2026-08-18) is published for this envelope: Download the GLB model

Not published yet

A 2D PDF drawing, a DXF and a neutral STEP file are not published for this record today, so there is no link here to a file that does not exist. A configured drawing carries tolerances and interface dimensions we will stand behind, which is why it comes out of a short qualified request rather than a download button.

Request a configured drawing

Record MM-EM08-012, revision A, verified by Micro Motion application engineering on 2026-08-18. Catalog 2026-08-18.public.1.