Introduction
The 1756-M08SE is an Allen-Bradley ControlLogix SERCOS interface module that lets a ControlLogix rack talk directly to SERCOS servo drives. It supports up to eight axes per module and up to 32 axes per controller, so one chassis can coordinate a full multi-axis motion system without extra interface hardware.
If you run Kinetix servo platforms, this module is the practical bridge between your ControlLogix processor and the drives on the machine. Oil AutoTech supplies ready-to-ship ControlLogix spares for oil, gas and industrial automation applications, with hands-on help selecting the right module for your rack.
Technical Specifications
| Specification | Value |
|---|---|
| Module Type | SERCOS Interface Module |
| Series | ControlLogix |
| Axes per Module | 8 |
| Axes per Controller | 32 |
| Supported Data Rates | 4 Mbps; 8 Mbps |
| Drive Control Modes | Position, velocity, torque |
| Backplane Current (5V) | 760 milliamps |
| Backplane Current (24V) | 2.5 milliamps |
| Power Dissipation | 5.0 Watts |
| Thermal Dissipation | 21.2 BTU-hour |
| Isolation Voltage | 50 Volts Continuous |
| Enclosure | None |
| UPC | 10612598295996 |
What the Key Specs Mean
The 8-axis capacity suits multi-axis servo cells where several drives must stay synchronized. Two data rates, 4 Mbps and 8 Mbps, let you trade cycle time against drive count. At 4 Mbps, cycle times run 0.5 ms up to 2 drives, 1 ms up to 4 drives and 2 ms up to 8 drives. At 8 Mbps, they run 0.5 ms up to 4 drives, 1 ms up to 8 drives and 2 ms up to 16 drives. The 0.5 ms cycle time applies only to Kinetix 6000 drives.
Position, velocity and torque control modes cover most motion profiles on one module. Backplane draw is modest at 760 mA on 5V and 2.5 mA on 24V, so it fits standard ControlLogix power budgets.
Compatibility and Integration
The 1756-M08SE installs directly into 1756 ControlLogix chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13 and 1756-A17. Standard power supplies include 1756-PA72/C, 1756-PA75/B, 1756-PB72/C, 1756-PB75/B, 1756-PC75/B and 1756-PH75/B. Redundant options include 1756-PA75R, 1756-PB75R and 1756-PSCA2.
It works with 2093 Kinetix 2000, 2094 Kinetix 6000, 2099 Kinetix 7000 and 2098 Ultra3000 SERCOS servo drives. Physical media for SERCOS communication are plastic-fiber optic cables (2090-SCEPxx-0, 2090-SCVPxx-0, 2090-SCNPxx-0, 2090-SCVGxx-0) and glass fiber optic cables.
Integration Note
SERCOS wiring may require specific fiber optic cables and connection accessories. Confirm cable part numbers and any gateway needs with your supplier before ordering.
Comparison: 1756-M08SE vs. Other ControlLogix Motion Options
- 1756-M08SE — 8 axes, SERCOS interface, 4/8 Mbps, Kinetix drive families.
- Analog servo modules — typically fewer axes and analog command wiring, not SERCOS digital communication.
- Other SERCOS modules — may support fewer axes; the 1756-M08SE covers up to 8 axes per module and 32 per controller.
Choose the 1756-M08SE when your machine uses Kinetix SERCOS drives and you need multi-axis coordination in one ControlLogix slot group.
Applications
Typical uses include multi-axis servo positioning on packaging lines, coordinated motion on oil and gas valve or actuator test stands, and web handling where velocity and torque modes must switch quickly. The 8 Mbps rate and 1 ms cycle time up to 8 drives suit machines that need tight synchronization without adding controllers.
Selection Checklist
Before buying, verify your chassis model, power supply, drive family and required axis count. Check that your drives are SERCOS-compatible Kinetix models and that your fiber optic cabling matches the module. Please verify current lifecycle status and availability with Oil AutoTech before ordering.
FAQs
How many axes does the 1756-M08SE support?
It supports up to 8 axes per module and up to 32 axes per controller.
Which drives work with this module?
It is compatible with 2093 Kinetix 2000, 2094 Kinetix 6000, 2099 Kinetix 7000 and 2098 Ultra3000 SERCOS servo drives.
What data rates are available?
The module supports 4 Mbps and 8 Mbps SERCOS data rates.
What control modes does it offer?
Position, velocity and torque control modes.
Which chassis can I use?
1756-A4, 1756-A7, 1756-A10, 1756-A13 and 1756-A17 ControlLogix chassis.
Contact Oil AutoTech today for pricing and availability.
