Strict laws and new technologies are considerably increasing functional safety in mobile machine requirements.
Concomitantly, system errors pose serious risks for people, machines, and the environment.
This makes it important to have optimum architecture that ensures maximum reliability and early error detection.
This is where HYDAC excels with market-leading, certified products and solutions.
Electronic pressure transmitters and linear position transducers
Examples are electronic pressure transmitters and linear position transducers for applications with increased functional safety.
“Failsafe is the keyword for vehicle designers of mobile machinery,” an HYDAC spokesperson says.
“No single error is allowed to cause a breakdown or malfunction of part or all of the systems in safety-critical applications.”
The pressure transmitters, for use in safety-critical applications, are certified for Performance Level "d" (PLd) according to DIN EN ISO 13849.
Linear position transducers PLd comply with DIN EN 13849-1 and with comparable safety level SIL 2 in accordance with IEC 61508, the standard applicable worldwide for electronic products.
Pressure transmitters for applications with increased functional safety
Pressure transmitters for applications with increased functional safety include the following:
HDA 4700
The HDA 4700 is a linear position transducer for applications with increased functional safety.
This version of the pressure transmitter series HDA 4700 has been specially developed for use in safety circuits/safety functions as part of the functional safety of machinery and equipment up to PL d - Cat 3 (in accordance with ISO 13849).
The pressure transmitters are designed with two channels, with each channel consisting of a
sensor element and evaluation electronics.
As a result, the pressure transmitter develops two separate and independent output signals in proportion to the pressure.
The safety function is tested by evaluating and comparing the two analogue output signals in a higher-level system.
The main areas of application are as sensor elements in mobile, safety-oriented systems such as load torque displays or load torque limitation in truck-mounted cranes or working platforms.
HLT 1100-R2
Linear position transducer – HLT 1100-R2, a version of the linear position sensor series HLT 1100, is especially for use in safety circuits/safety functions.
This takes part of the functional safety of machinery and equipment up to SIL 2 (IEC 61508) or PL d (ISO 13849).
The sensor, based on elapsed time measurement, works on the principle of magnetostriction, which determines position, distance and/or velocity with high precision.
HYDAC offers this version in a pressure-resistant stainless-steel housing for full integration in hydraulic cylinders.
HAT 1000
HAT 1000 is an absolute measuring single-turn encoder.
Due to the non-contact, magnetic measuring method and robust design, the HAT 1000 is particularly suitable for angle of rotation measurement on mobile machines.
The two-chamber design encapsulates the electronics so that IP 6K9K is guaranteed with the appropriate electrical connection.
The encoders meet safety requirements according to SIL2 (IEC 61508) or PL d (ISO 13849) in the safe version.
Therefore, the encoder can be advantageously used in many mobile machine applications, especially for increased safety requirements.
These are just a few examples of HYDAC’s capability when it comes to functional safety in mobile machines.
