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Expansion module

Functional safety certified

Parker Hannifin, offers its IQAN-XC41, -XC42, and -XC43 expansion modules with certification according to IEC 61508 safety integrity level 2 (SIL 2). This development makes it possible to use the modules as part of machinery safety functions up to EN 13849-1 Performance level d (PLd).

The XC4x series supports Classical CAN and CAN FD (Source: Parker Hannifin)

With safety-certified expansion modules, engineers can simplify system implementation and machine design in mobile hydraulic applications demanding higher levels of functional safety, explained the company. Such applications include those relating to material handling, construction, aerial platforms, and specialty vehicles like refuse trucks, for example.

The development means that both types of controllers on the latest IQAN platform - MC4x commander controllers and XC4x expansion modules - provide safety-certified versions so that machine designers have options at their disposal. According to the company, for instance, design engineers can now assign critical I/O to a module at the best physical location on the machine, reducing wiring complexity and cost. This modularity enables upscaling or downscaling with pin-compatible units.

One feature of the XC4x is the company’s designed protocol, which safe and bandwidth efficient, according to them. The protocol supports Classical CAN (250 Kbit/s and 500 Kbit/s) and CAN FD up to 500 Kbits/2000 Kbit/s. In a system where all outputs that control hydraulic valves are safe to begin with, the application designer does not have to introduce additional components and complexity in order to implement basic stop functions, said the company.

IQAN is an electronic control system for mobile hydraulic applications. At the core of the product family is an integrated solution of controllers and displays, with the IQAN software toolchain facilitating configuration and maintenance tasks. The toolchain consists of three core software suites: IQANdesign for application design, IQANsimulate for simulation of the application, and IQANrun for service and diagnostics.

When using IQANdesign, a graphical tool for system layout and machine function design, there is no need to compile the application or embedded software (Parker compiles and verifies all embedded software and the IQAN application interpreter).

J1939 functional safety communications protocol

Ultimately, multiple IQAN commander modules can be combined with IQAN protocols for exchanging safety-related signals with real-time performance between modules. From a safety perspective, it is an advantage for the developer that the controller and diagnostics tools are designed to work together. The company explained, it is far easier to provide a reliable and carefully considered interface when everything belongs to the same system of software support tools and controller hardware. IQAN implements safety-related devices with generic support from J1939-76 for communication with sensors and other input devices.

The IQAN-XC4x expansion module family includes three safety-certified: XC41, XC42, and XC43. Each is for use in different ways to meet the requirements of hydraulic mobile machine, enabling it to expand an IQAN control system when connected to an IQAN-MC4x commander controller.

Parker offers three versions of the safety-certified MC4xFS and explained: the MC41FS, which is for one or two safety functions in support of cost-efficient, task-oriented control; the MC42FS, which provides a number of safe outputs for mid-size applications and I/O distribution; and the MC43FS, a centralized controller for applications involving multiple safety functions.


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Parker Hannifin