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Part of the Omron CJ-Series PLCs series — see the full model table, lifecycle status and replacement parts.

Omron CJ1W-NCF71 — brown Omron cardboard shipping carton held in hand on a wooden surface showing the white label TYPE CJ1W-NCF71 / NC UNIT / Ver. 2.1 / LOT No. 240613M / QTY. 1 / barcode 4 547648 708869 / OMRON Corporation / MADE IN CHINA / blue OMRON band

Omron CJ1W-NCF71 — MECHATROLINK II Motion Unit, 16

SKU: CJ1W-NCF71

USD 245.00

CJ-series MECHATROLINK-II Position Control Unit, up to 16 servo axes on a 10 Mbps motion bus. 360 mA at 5 VDC, slim 31 x 90 mm body.

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Product Overview

The Omron CJ1W-NCF71 is a CJ-series CPU Bus Unit that runs up to 16 axes of position, speed, or torque control over a MECHATROLINK-II motion network. It is manufactured by Omron Corporation. Hengyixin Automation stocks this controller in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports. Specifications on this page were checked against Omron's CJ-series Fieldbus Unit documentation.

17-byte or 32-byte frames; Manchester encoding; bus topology Transmission cycle selectable 0.25 ms / 0.5 ms / 1 to 8 ms per network

Pairs with Omron W-series MECHATROLINK-II servo drives (R88D-WN[]-ML2) and Sigma-II drives with JEPMC-W602 interface Transmission cycle selectable 0.25 ms / 0.5 ms / 1 to 8 ms per network

CX-Motion-NCF (under CX-One V4) is the configuration tool.

Key Features

  • Pairs with Omron W-series MECHATROLINK-II servo drives (R88D-WN[]-ML2) and Sigma-II drives with JEPMC-W602 interface
  • Transmission cycle selectable 0.25 ms / 0.5 ms / 1 to 8 ms per network
  • Slim 31 x 90 x 65 mm CJ CPU-bus body at ~95 g; 360 mA at 5 VDC backplane draw
  • 17-byte or 32-byte frames; Manchester encoding; bus topology
  • SKU: CJ1W-NCF71
  • Series: CJ-series CPU Bus Unit, MECHATROLINK-II Position Control Unit

Best-Fit Applications

  • Replacement of multiple per-axis CJ1W-NC413 / NC433 pulse PCUs when the cabinet migrates to MECHATROLINK-II servos
  • Pair with the CJ1W-NC271 (2-axis MECHATROLINK-II) on the same CJ rack for a small-budget 2-axis line and room to grow to 16
  • Palletizer or pick-and-place rig with 8 to 16 axes where centralized MECHATROLINK-II motion outperforms per-axis pulse PCUs

Buying Checklist

  • Pick the CJ1W-NCF71 for the dedicated 16-axis MECHATROLINK-II motion slot on a CJ CPU rack
  • Pick the CJ1W-NC413 / NC433 instead when the cabinet has stepper / pulse-input drives without a MECHATROLINK-II interface
  • Pick the CJ1W-NC271 / NC471 instead for 2 or 4 axes (lower-cost entry points in the same MECHATROLINK-II family)

Technical Specifications

Series CJ-series CPU Bus Unit, MECHATROLINK-II Position Control Unit
Model CJ1W-NCF71
Max Controlled Axes 16 axes (MECHATROLINK-II bus)
Bus Protocol MECHATROLINK-II, 10 Mbps synchronous, 17 or 32 byte frames
Transmission Cycle 0.25 ms / 0.5 ms / 1 to 8 ms (selectable)
Bus Length Up to 50 m total (30 m with 16 slaves), bus topology
Control Modes Position, speed, torque control per axis
Position Range -2,147,483,648 to +2,147,483,647 command units
Compatible Servos Omron R88D-WN[]-ML2 W-series MECHATROLINK-II drives; Sigma-II with JEPMC-W602 interface unit
Current Draw 360 mA at 5 VDC from CJ backplane
Dimensions 31 x 90 x 65 mm slim CJ CPU-bus body, 95 g
Configuration CX-Motion-NCF under CX-One V4; supports CJ-series ladder; not for NJ-series

FAQ for CJ1W-NCF71

What is the difference between CJ1W-NCF71 and CJ1W-NC413?
Different control method. The NCF71 talks to MECHATROLINK-II servo drives over a 10 Mbps synchronous motion bus; up to 16 axes per unit; no pulse output. The NC413 is a 4-axis pulse-train Position Control Unit with up to 500 kpps open-collector pulse output to stepper or pulse-input drives. NCF71 is for centralized MECHATROLINK-II builds; NC413 is for pulse-input builds on older drives.
Does the CJ1W-NCF71 do linear or circular interpolation?
The bare CJ1W-NCF71 does NOT do linear or circular interpolation; it sends position / speed / torque commands to each axis independently. For G-language linear / circular interpolation, pick the CJ1W-NCF71-MA (the -MA suffix adds the MA interpolation feature set and 100-position macros per axis).
What servo drives work with the CJ1W-NCF71?
Omron W-series MECHATROLINK-II servos (R88D-WN[]-ML2) are the native pairing. Sigma-II / MECHATROLINK-II servos (with the JEPMC-W602 interface unit or equivalent) also work on the same bus. Drives from other vendors that carry a MECHATROLINK-II interface can be added when their ESI / GSD is registered, but stick to the Omron W-series for like-for-like spare replacement.
What is the MECHATROLINK-II bus cycle on the CJ1W-NCF71?
0.25 ms / 0.5 ms / 1 to 8 ms per network (selectable in CX-Motion-NCF). 0.25 ms or 0.5 ms is the cycle for high-speed multi-axis synchronization; 1 to 8 ms cycles are used for looser coordinated moves. The bus is 10 Mbps Manchester-encoded over shielded twisted-pair cable (FNY-W6003-[]). Maximum 50 m cable length (30 m when all 16 slaves are connected); 0.5 m minimum between stations.

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