Allen-Bradley 1756-M16SE ControlLogix 16-Axis SERCOS Interface Module

Allen-Bradley 1756-M16SE ControlLogix 16-Axis SERCOS Interface Module

The 1756-M16SE is an Allen-Bradley ControlLogix 16-Axis SERCOS Interface Module manufactured by Rockwell Automation, categorized as a chassis-based fiber-optic motion-control module for the 1756 ControlLogix backplane. Acting as the SERCOS master on a single digital fiber-optic ring, the 1756-M16SE links a ControlLogix controller to as many as sixteen SERCOS servo drives over one noise-immune fiber link, eliminating up to eighteen analog command wires per axis and delivering 2 ms worst-case cycle time across the full 16-axis load at 8 Mbps.

Allen-Bradley 1756-M16SE ControlLogix 16-Axis SERCOS Interface Module

 

Application Scenarios

Picture a high-speed rotary filling-and-capping monoblock on a beverage line, where sixteen Kinetix 6000 servo axes synchronize the carousel rotation, valve-lift plungers, capping heads, and reject gates in a single coordinated motion group. Wiring each of these axes with conventional ±10 V analog command plus encoder feedback would require roughly 288 individual conductors threading through a food-grade stainless enclosure — a cable burden that invites noise, drift, and nightly re-zeroing. Deploying one 1756-M16SE collapses the entire servo backbone into a single plastic-fiber SERCOS ring that daisy-chains from the ControlLogix chassis, through each Kinetix 6000 drive, and back to the module’s receive port. The 8 Mbps data rate of the 1756-M16SE holds a 2 ms SERCOS cycle time across all sixteen axes, letting the motion planner issue position, velocity, and torque commands synchronously with the I/O scan. When a capping head needs a recipe change, the Logix controller pushes new motion parameters down the same fiber link in milliseconds — no re-tuning, no analog re-calibration, no ground-loop chasing. On machines where a legacy analog motion controller is being replaced, the 1756-M16SE is the natural drop-in upgrade path into the ControlLogix family.

 

Parameter

Main Parameters Value / Description
Product Model 1756-M16SE (Series A)
Manufacturer Allen-Bradley / Rockwell Automation
Product Category ControlLogix 16-Axis SERCOS Interface Module (chassis-based motion master)
Maximum Drives Supported 16 SERCOS servo drives per module
SERCOS Data Rate 4 Mbps or 8 Mbps (selectable)
SERCOS Cycle Time @ 4 Mbps 0.5 ms (up to 2 drives), 1 ms (up to 4), 2 ms (up to 8)
SERCOS Cycle Time @ 8 Mbps 0.5 ms (up to 4 Kinetix 6000 drives), 1 ms (up to 8), 2 ms (up to 16)
Drive Control Modes Position, velocity, and torque
Field Wiring Single fiber-optic ring — transmit (TX) and receive (RX) ports on bezel
Fiber Cable Types Plastic: 2090-SCEPxx-0 / 2090-SCVPxx-0 / 2090-SCNPxx-0; Glass: 2090-SCVGxx-0
Fiber Segment Length Up to ~50 m plastic; up to ~250 m glass per SERCOS transmission section
Backplane Current 760 mA @ 5.1 V DC; 2.5 mA @ 24 V DC
Power Dissipation 5.0 W
Slot Width 1 ControlLogix slot (any slot in chassis)
Compatible Chassis 1756-A4, -A7, -A10, -A13, -A17
Compatible Drives 2093 Kinetix 2000, 2094 Kinetix 6000, 2099 Kinetix 7000, 2098 Ultra3000 SERCOS
Operating Temperature 0 to 60 °C (32 to 140 °F)
Storage Temperature -40 to 85 °C (-40 to 185 °F)
Relative Humidity 5–95% noncondensing
Vibration / Shock 2 g @ 10–500 Hz operating; 30 g operating shock, 50 g non-operating
Temperature Code T4A (North America)
Certifications c-UL-us Listed, Class I Div 2 Groups A/B/C/D, CE (EN 61326-1, EN 61131-2), C-Tick
Weight Approx. 1.0 kg (2.2 lb)
Programming Software RSLogix 5000 / Studio 5000 Logix Designer (MOTION-UM001)
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