Interface Module, SERCOS, 8 Axis, 4 - 8 Mbps, Single Fiber Optic Link,Our Bulletin 1756 ControlLogix® chassis-based modules provide a full range of digital, diagnostic digital, analog, motion control, specialty & I/O, and compute modules to meet your application needs. You can use any of the chassis-based modules in the local chassis of a ControlLogix controller or in a chassis linked to a ControlLogix controller across ControlNet™ or EtherNet/IP™ networks.