License Concept
All SCALEXIO I/O boards and the DS2680 I/O Unit include a failure simulation function. To activate the Failure insertion Unit (FIU), you need an additional FIU license. You will be sent a dongle with the FIU license for the host PC. Each license can be used for one SCALEXIO system.
The licenses are scaled for using failure simulation with different numbers of channels. The failure simulation is configured with ConfigurationDesk.
You need the appropriate SCALEXIO Failure Simulation license for the number of I/O channels you use in ConfigurationDesk. The FIU license is needed only for running the simulation, not for configuring the I/O channels with ConfigurationDesk.
Hardware Components
The SCALEXIO Failure Insertion Unit (FIU) consists of several components:
- An onboard failure routing unit (FRU) on the I/O channels prepares failure simulation by switching the I/O channels to fail rails. The unit is available for each channel on each board and is implemented by relays.
- Depending on their properties, the channels are connected to the failure simulation system by the high-current (up to 80 A) or the low-capacitance (up to 1 A) fail rail. The low-capacitance fail rail connects signal generation channels and bus channels to the central FIU. The high-current fail rail connects signal measurement channels to the central FIU.
- The central FIU is located on either the DS2642 FIU & Power Switch Board or the DS2680 I/O Unit. The central FIU consists of semiconductor switches and performs actual failure insertion.
- The fail plane segment switch is used to switch selected segments into the fail rail for failure simulation. This is a way to minimize performance capacities and avoid signal corruption with large systems that have a high number of I/O channels, contain several I/O units, or are distributed across several cabinets.
The following types of failure can be switched in via the central FIU:
- Short circuit to GND or UBat
- Broken wire
- Crossed wire between two channels
- Bouncing for all failures
