Siemens 6ES5266-8MA11 Positioning Module

This positioning module controls one servo or stepper axis for SIMATIC S5 systems. It executes point-to-point positioning with programmable acceleration profiles. You can program this unit directly from STEP 5 software.

Technical Specifications

Parameter	Details
Brand	Siemens
Model	Siemens 6ES5266-8MA11
Category	Positioning Module (SIMATIC S5 Series)
Dimensions (H x W x D)	250 mm x 25 mm x 210 mm
Weight	0.68 kg
Number of Axes	1 axis
Supported Drive Types	Stepper motor or servo drive with pulse train input
Position Data Memory	64 target positions
Position Resolution	±0.005 mm (encoder-dependent)
Maximum Positioning Range	±9999.99 mm
Velocity Range	0.1 to 9999.9 mm/s
Acceleration Range	0.1 to 999.9 mm/s²
Internal Components	1 CPU + 1 pulse generator + 1 encoder counter + 1 PCB
Encoder Interface	Incremental (5V TTL, up to 200 kHz)
Output Signal	5V differential or 24V single-ended pulse/direction
Digital Inputs	6 (limit switches, home, start, stop, reference)
Digital Outputs	4 (drive enable, position reached, error, ready)
Power Supply	5 V DC from backplane + external 24 V DC
Current Draw (5V)	250 mA typical
Current Draw (24V external)	200 mA typical
Built-in Energy Storage	680 µF capacitor for position retention
Status Indicators	6 LEDs (RUN, ERROR, LIMIT+, LIMIT-, HOME, READY)
Operating Temperature	0°C to 55°C

Detailed Feature Overview

This module stores up to 64 target positions with individual motion profiles. Each position includes its own velocity, acceleration, and deceleration values. You can sequence these positions for automated machine cycles smoothly.

A 680 µF capacitor retains position data during brief power interruptions. Consequently, your axis does not lose its home reference after a brownout. The encoder input accepts TTL signals up to 200 kHz for precise feedback.

You will find six dedicated digital inputs on this module. These inputs handle limit switches, home switch, start, stop, and reference signals. Four outputs provide drive enable, position confirmation, error, and ready status.

Installation and Programming

Siemens 6ES5266-8MA11 fits any S5 rack slot except the CPU position. Use STEP 5 software to define target positions and motion parameters. Connect shielded cables for both encoder and pulse output signals.