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Safety PLC

Supports J1939, CANopen, and CANopen safety

Published 2017-08-09

Ifm offers a SIL-2/PL-d-compliant host controller. The unit features four CAN interfaces.

The shown devices come in an IP67-rated housing and are designed for heavy-duty vehicles (Photo: ifm)

The third generation of the Ecomat devices comprises two independent PLCs. One of them is certified as a safety controller. In addition to its multi-functional inputs and outputs with diagnostic capabilities, the unit features two Ethernet ports and four CAN interfaces. The CAN interfaces support J1939, CANopen, and CANopen safety. The control functions are integrated into the application program due to Codesys programming (version 3.5).

The control electronics are integrated into a metal housing with front-mounted, coded central plugs for mobile use, providing all the necessary connections for inputs, outputs, communication, and programming. The core of the device is a 32-bit micro-controller running at 300 MHz. Its 6-MiB memory includes a 1-MiB file storage system. The two PLC units allow for subdivision of the application software, if required. Consequently, the safe program part can be executed without interference from the general program execution. This ensures operation even with complex control functions, said the company. The controller can be used in applications up to ISO 13849 PL-d and IEC 62061 SIL-2.

The inputs and outputs can be configured as digital, frequency, or analog inputs with diagnostic function or as inputs for resistance measurement. The analog inputs enable both current and voltage measurement. The outputs can be configured as digital or PWM outputs with diagnostic capabilities, with or without current control. All inputs and outputs can also be configured as safe channels. Thus, safe sensors and actuators can be directly connected and processed in the application software.

Programming is done by means of IEC 61131-3 languages. Established and certified libraries are available for special functions and safe applications. Maintenance, diagnosis, and updates are performed using Ethernet and the maintenance tool. Additionally, these functions can be accessed via an application interface for ifm’s PDM displays and via a software development kit for customer applications.

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