Measurement System MesSy

The IRS MesSy II FD is a highly versatile, compact, multifunctional measurement module for parallel voltage measurement on up to 128 measurement channels.

Digital inputs and outputs (I/O) are used to switch and control external hardware to achieve the required data acquisition.

Various communication interfaces such as CAN, serial interfaces, etc. make it extremely versatile.

Thanks to DAkkS calibration capability including an adjustment option and their high reliability, the modules deliver very accurate long-term results.

Recalibration can be integrated easily and is maintenance-friendly.

And all this at an unbeatable price and without software license costs!

Requirements for lifetime and durability validation tests

Electronic control units for automotive applications require comprehensive validation to ensure that the device works properly for years under harsh environmental conditions. During validation, the inputs and outputs of the device under test (DUT) must be stimulated and its operation continuously monitored. IRS offers lifetime test systems that simulate the required vehicle components. Our lifetime test system was developed to meet the following requirements:

• Simulation of real load conditions
• Diagnostics via CAN, LIN, FlexRay
• Independent parallel operation of multiple DUTs
• Continuous monitoring of all signals
• Standardized hardware and software platform

Lifetime simulation test

Meeting these requirements calls for a measurement system that covers the following functions:

• Monitoring of multiple analog inputs
• for all inputs and outputs of the control unit
• parallel
• continuous
• CAN communication
• Residual bus simulation
• ISO-TP diagnostics
• Implementation of custom protocols
• Stimulation of the inputs
• Digital and analog
• Static and dynamic
• Monitoring of the supply current
• especially sleep current of a few µA
• fast switchover to high-current measurement on wake-up

Hardware

• 128 analog inputs
• 96 single-ended 0-32V
• 125kS/s simultaneous
• 1MS/s for one channel (of 8)
• 32 differential ±48V
• Digital outputs
• via small-signal relays
• 16 SPST
• 48 SPST
• Semiconductor low-side switches
• 24 x for PWM generation up to 500kHz
• 16 x for generic drivers
• General-purpose I/Os
• 16x configurable as input/output
• 10 CAN interfaces
• 25 serial interfaces (for LIN)

Software

• LabVIEW-based design for easy integration into NI TestStand
• Background signal monitoring without using PC processing power
• Continuous streaming of
• analog, CAN and LIN data
• with adjustable filtering to reduce file size
• Crash recorder that stores the "ring buffer" of the last seconds before a failure