Electrical interface CPX-CTEL

Product Description
The Festo CPX-CTEL is a master module for the CPX terminal that serves as a gateway between the CPX system and decentralised devices with I-Port interface, such as valve terminals or input modules . With 4 standardised M12 I-Port connections, each CTEL master module enables the integration of up to 4 decentralised devices into the CPX system, allowing short pneumatic lines and significantly reducing cycle times .

Key Features & Advantages

• Up to 4 I-Port Devices per Master Module: Each CPX-CTEL module provides 4 I-Port interfaces, allowing connection of up to 4 decentralised valve terminals or I/O modules directly to the CPX system 

• Decentralised Installation for Faster Cycles: Enables placement of compact valve terminals and I/O modules close to the cylinders being controlled, dramatically shortening compressed air lines and reducing pressurisation and exhaust times 

• Standardised M12 Connections: Features uniform M12x1, 5-pin sockets for all I-Port connections, reducing cabling variety, installation time, and logistics complexity 

• Based on IO-Link Technology (230.4 kbaud): The I-Port interface is based on IO-Link technology, offering compatibility with that standard in certain areas while providing plug-and-work simplicity without complex IODD configuration 

• Up to 8 Master Modules per CPX Terminal: A single CPX terminal can accommodate multiple CTEL master modules, with the total number limited only by the CPX address space of 64 bytes input and 64 bytes output 

• Flexible I/O Configuration: Supports 13 different I/O configuration presettings, including pure input (up to 32 bytes), pure output (up to 32 bytes), and mixed operation (up to 32 bytes each) 

• Comprehensive Diagnostic Capability: Equipped with 7 LED indicators for continuous status monitoring of the CTEL system and connected devices, plus channel-oriented diagnostics for high system availability 

• Galvanically Isolated Load Voltage Supply: Features electrical isolation between operating voltage (UEL/SEN) and load voltage supply (UVAL/OUT), ensuring stable operation for connected actuators 

• Star Topology for Reliable Connection: Each I-Port connects to exactly one device in a star topology, eliminating complex daisy-chaining and simplifying troubleshooting 

• Hot-Swap Capable for Minimal Downtime: Supports automatic configuration of connected devices, allowing quick replacement without complex reconfiguration, following a plug-and-work principle 

• Reduced Component Costs: By enabling the use of smaller valves with sufficient flow due to shorter pneumatic lines, the CTEL system contributes to overall cost reduction 

• IP65 Protection Class: Fully assembled module achieves IP65 protection, dust-tight and protected against water jets, suitable for direct machine mounting in harsh industrial environments 

• No Corrosion Stress Construction: Rated Corrosion Resistance Class (CRC) 0 for protected industrial environments, ensuring long-term reliability 

• Compatible with Wide Range of I-Port Devices: Supports VTUB, VAEM, VMPA, and CPV valve terminals as well as CTSL input modules 

• LED Status Indicators: Seven LEDs provide clear visual indication of operating status, system faults, and device communication health 

• Easy Commissioning & Re-parameterisation: Simple startup and reconfiguration of parameters for connected IO-Link compatible devices without additional cabling 

• CE and RoHS Certified: Meets EU EMC Directive and RoHS requirements for environmental compliance 

Technical Specifications

Brand: Festo

Model Series: CPX-CTEL

Product Nos.: CPX-CTEL-4-M12-5POL (4-port master), CPX-CTEL-2-M12-5POL-LK (2-port master with IO-Link)

Product Type: Electrical Interface / I-Port Master Module

Degree of Protection: IP65 / IP67 (with CPX terminal) 

Number of I-Port Connections: 4 (CPX-CTEL-4-M12-5POL) or 2 (CPX-CTEL-2-M12-5POL-LK)

Electrical Connection: M12x1, 5-pin socket (M12 A-coded) 

Maximum Devices per Master Module: 4

Maximum Master Modules per CPX Terminal: Limited by CPX address space (64 bytes I / 64 bytes O)

Maximum Address Capacity per Module: Configurable up to 32 bytes input and 32 bytes output 

I-Port Baud Rate: Fixed 230.4 kBit/s 

Communication Protocol: I-Port (based on IO-Link technology, partially compatible)

Topology: Star – 1 device per I-Port 

Nominal Operating Voltage Electronics/Sensors (UEL/SEN): 24 V DC

Nominal Operating Voltage Load (UVAL/OUT): 24 V DC

Galvanic Isolation: Yes (between UEL/SEN and UVAL/OUT) 

Maximum Cable Length per I-Port: Not specified (use Festo original I-Port connecting cables)

Ambient Temperature: -5°C to 50°C 

Storage Temperature: -20°C to 70°C

Relative Air Humidity: 0% to 90% (non-condensing)

Corrosion Resistance Class (CRC): 0 – No corrosion stress 

Mounting: Within CPX terminal (interconnection block)

Number of LEDs: 7 status indicators 

Housing Material: Reinforced polyamide / PA

Certifications: CE, UL Recognized, RoHS 

Country of Origin: Germany

Pin Assignment (M12 Socket, 5-pin) :

Pin 1 – 24 V UEL/SEN (PS) – Operating voltage supply for electronics/sensors

Pin 2 – 24 V UVAL/OUT (PL) – Load voltage supply for outputs/valves

Pin 3 – 0 V UEL/SEN (PS) – Operating voltage supply (negative)

Pin 4 – C/Q I-PORT – Communication signal (I-Port data line)

Pin 5 – 0 V UVAL/OUT (PL) – Load voltage supply (negative)

LED Status Indicators :

PS (green) – Operating voltage UEL/SEN connected (PS OK)

PS flashes green – At least one device reports undervoltage UVAL/OUT (PL)

PL (green) – Load voltage UVAL/OUT connected (PL OK) – on CPX-CTEL-2 variant

SF (red) – System fault (module or connected device error)

Additional LEDs (green/yellow) – Per-port status for active communication and device ready

Compatible I-Port Devices :

Valve Terminals:

• VTUB-12-V

• VAEM-L2-S-PTL

• VAEM-L1-S-8PT / -16PT / -24PT

• VMPAL-EPL-IP032

• CPV10-GE-PT-8

• CPV14-GE-PT-8

Input Modules:

• CTSL-D-16E-M12-5-PT (2 bytes input)

• CTSL-D-16E-M8-3-PT (2 bytes input)

Configuration Options (13 presets) :

Pure Output Module: 0/8, 0/16, 0/24, or 0/32 bytes (I/O)

Pure Input Module: 8/0, 16/0, 24/0, or 32/0 bytes (I/O)

Mixed Operation: 8/8, 16/16, 24/24, or 32/32 bytes (I/O)

Unused Module: 0/0 bytes (automatic configuration only)

System Requirements :

• CPX terminal with fieldbus connection (PROFINET, EtherNet/IP, PROFIBUS DP, EtherCAT, etc.)

• CPX power supply module (e.g., CPX-M-PS-1.5) with sufficient capacity

• Festo original I-Port connecting cables (ensure specified maximum length per application)

• CPX system manual (P.BE-CPX-SYS-...) for installation and addressing guidelines

Functional Principle

The CTEL master module acts as an intelligent gateway between the CPX terminal's internal bus and up to 4 decentralised I-Port devices . Each connected device (valve terminal or I/O module) is assigned a dedicated address range within the CPX's overall I/O map (max. 64 bytes each). The module continuously exchanges I/O data with the devices via I-Port at 230.4 kbit/s, while the CPX terminal handles fieldbus communication with the host controller .

By allowing decentralised placement of valves and I/O points close to actuators, the CTEL system dramatically reduces compressed air line lengths, which in turn minimises flow losses and decreases cycle times, often enabling the use of smaller, more economical valves .

Ideal For

Decentralised pneumatic control systems requiring short compressed air lines and fast response times, automotive manufacturing lines (body shop, assembly), packaging machinery with distributed valve banks, pick-and-place systems with multiple I/O points, retrofitting existing CPX terminals with additional I/O capacity, and applications where reducing cycle time through decentralised valve placement is critical.

Why Choose Festo CPX-CTEL Electrical Interface

Choose the Festo CPX-CTEL for its unique ability to decentralise up to 4 valve terminals or I/O modules per master module directly on the CPX platform, dramatically shortening pneumatic lines and reducing cycle times . Featuring 4 standardised M12 I-Port connections, IO-Link based technology with fixed 230.4 kbaud communication, up to 8 master modules per CPX terminal (limited by 64-byte I/O address space), flexible I/O configuration with 13 presets (including pure input/output up to 32 bytes, or mixed operation 8/8 to 32/32 bytes) , comprehensive 7-LED diagnostic system, galvanically isolated load voltage supply, star topology for reliable point-to-point connection, IP65 protection, CRC 0 corrosion resistance, compatibility with a wide range of I-Port valve terminals (VTUB, VAEM, VMPAL, CPV) and input modules (CTSL) , hot-swappable plug-and-work device replacement, and German engineering quality. Backed by Festo's extensive CPX ecosystem documentation, this electrical interface delivers reliable, flexible, and cost-effective decentralised I/O expansion for demanding industrial automation applications.

Tags

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