Terminal interfaces standard valve terminals to Fieldbus systems.
Press Release Summary:
CPX system is based upon configurable modules, where different electrical functions and pneumatic interface can be assembled to meet requirement. It is constructed in sandwiched functional layers consisting of interlinking base block, electronics intermediate module, and connection top block. Electronics modules are either analog or digital. System supports DeviceNet, Profibus-DP, Interbus, CANOpen, and CC-Link and provides point level diagnostics.
Original Press Release:
CPX Modular Electrical Terminal Consolidates Festo's Strength in Supporting Fieldbus Applications
As a universal peripheral solution, designed specifically to serve as a means by which standard valve terminals can be interfaced directly to fieldbus systems, or to implement additional I/O capability in existing fieldbus installations, Festo's CPX modular electrical terminal offers the simplicity, convenience, and the versatility. The CPX system is based upon configurable modules, where different electrical functions and a pneumatic interface can be assembled to meet the requirements of a wide variety of applications.
Because the system is designed around multi-stage (sandwiched) modules for digital and analog I/O capability, Fieldbus interface, system linking (including power supply options), and pneumatic interface modules, (for the implementation of Festo's
Type CPA, MIDI and MAXI valves), users of the CPX Terminal, benefit from its capability to service different interfaces for Fieldbus protocols. DeviceNet, Profibus-DP, Interbus, CANOpen, CC-Link, are among those protocols which are currently supported, with future aims at including Ethernet capability and Festo's Type FEC programmable Logic Controller.
The CPX system is constructed in sandwiched functional layers consisting of an interlinking (base) block, the electronics (intermediate) module, and a connection (top) block. The interlinking blocks support serial communications between modules, and separate power capabilities for electronics and sensors, and valves and actuators. An additional power supply can be ordered as an option, for example to separate the actuator power supply. Several connection blocks configurations facilitate implementation of different signal connection interface systems.
The Electronics modules are either analog or digital types, and both are designed to mount atop an interlinking block to form a highly concentrated I/O module. There are separate configurations for analog inputs and outputs, and this also holds true for digital I/O as well.
Devices with standard analog interfaces, such as pressure switches, temperature and flow rate, filling level transducers can be monitored and controlled with the 0 to 10 Volt (0 to 20mA and 4 to 20mA) analog input module. The analog input module units (like all of the other I/O modules) can be parameterized to meet the needs of the application, including different data formats, Protection is achieved through integrated electronic fuse.
The analog output module also controls devices with standard analog interfaces such as proportional valve, the analog output module, like the input unit, operates on 0 to 10 Volts (0 to 20mA or 4 to 20mA), and depending upon the connection block (user interface) numerous socket and connection options can be
implemented.
Digital I/O is also handled by an independent module (multi-module available to combine both), with the sandwiched construction that runs true to the CPX Terminal's design concept. The digital input module allows the connection of two-wire and three-wire sensors, like proximity sensors, and inductive or capacitive sensors. Up to 8 inputs are possible (per module). All inputs are also parameterized via software,
or in the future, a hand held tool. The CPX system provides point level diagnostics.
The digital output module controls actuators such as individual valves in the application. Separate circuits are implemented in the output module with an additional power supply, which can be connected in parallel with the other supply to support devices that dissipate as much as 4 A. This module also operates on a 24-volt DC power supply and uses PNP logic, and is configured in the same fashion as the other CPX Terminal modules. A digital input/output (multi) module is also available for supporting devices with higher concentrations of I/O at a connection point. The fact that CPX I/O modules are designed for connection via M12 (5- or 8-pin), M8 (3-pin), Sub-D, Harax and terminal connections a wide range of coil and sensor control configurations can be achieved. With its Sub-D configuration, the multi module is highly adaptable to control boxes configured with various push buttons and indicator lamps. Using a pre-assembled cable with the M12 plug (8-pin connection block) for
user access, the digital I/O multi module can support up to four cylinder/valve combinations with integrated sensors (2 inputs and 2 outputs per socket). While the Sub-D and M8 configurations of the module are capable of providing IP65 protection,
the spring-loaded cage clamp configuration of the connection block offers a fast and convenient method of connecting pig-tailed cables inside a control panel with IP20 protection.
CPX terminals are so versatile, that by means of a pneumatic interface module, Festo's highly integrated CPA 10 and CPA 14 Compact Series, and the field-proven Midi/Maxi Series valves can be assembled into standalone manifolds, which can be operated with any of the fieldbus protocols supported. The two CPA type valves can have up to 22 coils, while Midi/Maxi configurations can have up to 26 coils for applications where higher flow rates are necessary.
The diagnostic capability of CPX terminals with pneumatic interface includes load voltage of the valves, short circuit solenoid coils, broken wires (quiescent current detection method) is capable of monitoring coil status, including missing coils and short circuit in the valve system.
Compared to the competition, the CPX has resolved many of the
problems typically encountered in implementing "block I/O products," including those associated with communications with third party peripheral products, preventive maintenance diagnostics, customized I/O (input filter pulse, signal stretching, recovery from short circuit, hold or default for outputs and solenoids); scalable 11/12-bit analog I/O, and standalone capability for I/O capability.
For Further Information Contact:
Festo Corporation
395 Moreland Road
PO Box 18023
Hauppauge, NY 11788
Tel: 631-435-0800
Fax: 631-435-8026
