Ultra-fast Interrupter
UFI
The only LV124 / LV148 interruption device that supports Automotive Ethernet 1000base-T1 and GMSL as well as standard power lines up to 125A. Now with 10G Ethernet and GMSL2 in the new generation.
Ultra-fast Interrupter
125A
max current
1000base-T1
Ethernet support
GMSL
support
10G
Ethernet ready
Two UFI models — choose by interface requirements.
The UFI 125 covers power lines and standard buses. The UFI Ethernet/GMSL extends interruption testing to high-speed serial interfaces — a capability no other device on the market offers.
UFI 125
Standard
- Power lines: Up to 125A
- Bus switches 4 × standard (CAN, LIN etc.)
- Ethernet: Not supported
- GMSL: Not supported
- Networks: 12V, 24V, 48V
- Integration: Standalone or RTStand
- Best for: ECUs with CAN/LIN
UFI Ethernet / GMSL
Advanced
- Power lines: none
- Ethernet: 100base-T1 + 1000base-T1
- GMSL: supported
- 10G Ethernet New generation (release 2026)
- Networks: 12V, 24V, 48V
- Integration: Standalone or RTStand
- Best for: ECUs with Ethernet / camera / display
Key capabilities
- Performs all LV124 / LV148 short interruption tests — on power lines and bus lines
- Worldwide first device to support Automotive Ethernet 1000base-T1 interruption testing
- Worldwide first device to support GMSL interruption testing
- Supports configurable interruption profiles with feedback measurements during interruption and short-circuit tests
- Integrated UFI control via RTStand SignalGeneration — coordinated power and bus interruptions with precise timing
- Hardware upgrade available for external control of additional UFI devices — expanding multi-interface testing capacity
- New 2026 generation adds 10G Ethernet and GMSL2 support — future-proof for zonal architectures
Why Ethernet and GMSL interruption testing is different
Standard relay-based switching devices cannot cleanly interrupt a 1 Gbit/s signal — they introduce impedance mismatches, reflections, and ringing. The UFI uses purpose-designed high-frequency switching paths for each interface type, ensuring clean interruptions without signal integrity artefacts. For a detailed explanation, read the knowledge base article: Automotive Ethernet and GMSL in LV124 / LV148 testing.
Need interruption testing for Ethernet or GMSL?
Tell us about your ECU’s interfaces and we will spec the right UFI variant — standalone or integrated in RTStand.
LV124 / LV148 Testing Devices
Built by WKS Informatik GmbH · Ravensburg, Germany – Imprint