Analog I/O system C6 REMOTE I/O

digitalEthernetEtherCAT

Overview
KEB C6 Remote I/O is a modular EtherCAT I/O system for distributed signal acquisition and actuation. The system consists of a C6 bus coupler and a range of plug-in I/O modules. The bus coupler converts physical transfer technology, provides system voltages and preserves the EtherCAT protocol to the last module, so each module operates as an independent EtherCAT slave with immediate availability of data on EtherCAT.

Highlights

• Real-time EtherCAT I/O architecture to the last module
• Very compact: 25 mm module width (high packing density)
• Wide range of digital, analog, counter, drive and mixed modules
• Plug-in terminals and hot-swappable modules for fast maintenance

Technical specifications
Fieldbus: EtherCAT 100 Mbits/s
Module (W x H x D): 25 x 120 x 90 mm
Mounting: 35 mm DIN rail
Main controller: ET1100
Power supply: 24 V DC (-20 % … +25 %)
Protection class: IP20
Operating temperature: 0 … +55 °C; Storage: -25 … +70 °C
Automatic closing of forward/return lines; end module not required

Bus coupler
Fieldbus: EtherCAT 100 Mbits/s
Power supply: 24 V DC (-20 % … +25 %)
E‑Bus supply: up to 3 A (approx. 20 modules) depending on configuration
Connections: 2 x RJ45; max. cable length between couplers: 100 m

Module variants (overview)

• Digital I/O: 16/32 DI, combinations 16 DI/16 DO, 16 DI/8 DO etc., DO variants with different current ratings and relay options
• Counter / Fast inputs: encoder inputs, fast counting up to 200 kHz, dedicated fast-input modules
• Analog I/O: multiple AI/AO variants (0–20 mA, 0–10 V, ±10 V) and temperature/PT/TC inputs
• Drive & mixed modules: stepper/BLDC drive controllers, mixed I/O combining DI/DO/AI/RS485

Analog I/O details
Examples: 4 AI (0–20 mA / 4–20 mA) 12 bit, conv. time ~235 µs; 8 AI (0–20 mA) 12 bit, conv. time ~290 µs; 4 AO (0–20 mA / 0–10 V) 16 bit; E‑Bus loads vary by module (typ. 85–300 mA).

Counter / Fast inputs
Encoder inputs A/B/Ref (RS422), count frequency up to 200 kHz; modules with combinations (e.g. 2 encoders / 8 DI / 2 DO) and programmable IO for motion/counting applications.

Fieldbus extension & options
Extenders with 2 x RJ45 for EtherCAT branching; Multi-Fieldbus Interface (MFI) options available for PROFINET, EtherNet/IP, POWERLINK via specific modules.

Accessories

• Potential distribution modules
• Shielded connection terminals and clamping options
• CAP-Bus connectors, extenders and mounting accessories

Note
The C6 system is modular: specific module types have their own parameters (conversion times, E‑Bus loads, current ratings, signal levels and sampling rates). Consult module datasheets for detailed selection and wiring planning.