Overview
The Allen-Bradley 1756-M08SE is an 8-axis SERCOS servo motion module built for the ControlLogix platform. Installed directly into any compatible ControlLogix chassis slot, it provides high-speed fiber-optic communication to control up to 8 SERCOS servo drives per module and up to 32 axes per controller. This module supports position, velocity, and torque control modes, making it ideal for coordinated motion systems requiring deterministic, noise-immune communication.
Key Features
- Controls up to 8 SERCOS servo drives per module with configurable 4 Mbps or 8 Mbps data rates
- Supports position, velocity, and torque control modes for precise motion coordination
- Cycle times as fast as 0.5 ms (at 4 Mbps with 2 drives) to 2 ms (at 4 Mbps with 8 drives)
- Fiber-optic communication for noise immunity in harsh industrial environments
- Single slot width; installs in any available ControlLogix chassis slot
- Works with Kinetix 2000, 6000, 7000, and Ultra3000 SERCOS drives
Technical Specifications
- Number of Axes (Drives): Up to 8
- SERCOS Data Rates: 4 Mbps, 8 Mbps
- SERCOS Cycle Time @ 4 Mbps: 0.5 ms (up to 2 drives), 1 ms (up to 4 drives), 2 ms (up to 8 drives)
- SERCOS Cycle Time @ 8 Mbps: 0.5 ms (up to 4 drives), 1 ms (up to 8 drives), 2 ms (up to 16 drives)
- Drive Control Modes: Position, velocity, torque
- Current Draw (24V DC): 2.5 mA
- Power Dissipation: 5.0 W
- Input Voltage: 24 VDC
- Operating Temperature: 0 to 60 °C (32 to 140 °F)
- Storage Temperature: -40 to 85 °C (-40 to 185 °F)
- Relative Humidity: 5 to 95% non-condensing
- Mounting: Direct, ControlLogix chassis-based, any slot
- Slot Width: 1 slot
- Weight: 0.59 kg (0.81 lb)
- Certifications: CE, CUL, KC, RCM, UL
Typical Applications
- Coordinated multi-axis motion systems (pick-and-place, assembly machinery)
- High-speed packaging and labeling equipment
- Precision positioning machinery requiring deterministic performance
- Robotic cells and material handling systems
- Applications requiring fiber-optic isolation in electromagnetically noisy environments
Compatibility & Replacements
Compatible With
- ControlLogix 1756 chassis (all sizes: 1, 2, 4, 7-slot)
- Kinetix 2000, 6000, 7000, Ultra3000 SERCOS servo drives
- Studio 5000 / RSLogix 5000 programming software
- ControlNet and EtherNet/IP networked ControlLogix systems
- Redundant power supplies in compatible ControlLogix chassis
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering to ensure proper motion architecture and SERCOS drive configuration.
Works With
- Studio 5000 Automation Engineering & Design Environment (formerly RSLogix 5000)
- CompactLogix and GuardLogix ControlLogix-platform controllers
- SERCOS protocol (IEC 61491 fiber-optic interface)
- EtherNet/IP for controller-to-controller data exchange
- Kinetix motion control libraries and axis configuration tools
