The NI 199198-01 PXI Slot Blocker is a passive accessory that occupies empty slots in National Instruments PXI and PXI Express chassis to optimize thermal management and system performance. By blocking unused card slots, the blocker redirects airflow from empty positions toward occupied slots containing active modules, significantly improving heat dissipation in chassis configurations with rear-mounted or below-cage fans. This airflow management approach enhances cooling efficiency and extends module lifespan while maintaining system integrity and preventing inadvertent module insertion into unintended slots.
Technical Specifications
• Accessory Type: PXI Slot Blocker
• Compatibility: PXI and PXI Express chassis and control parts
• Quantity: Typically sold as a set of 5 (NI Part Number 199198-01)
• RoHS Compliant: Yes
• RoHS Phthalates Compliant: Yes
– Key Features
• Passive thermal management through directed airflow control
• Prevents air bypass through empty slots
• Supports standard and EMC filler panel integration
• Installation torque limit: 2.5 in·lb maximum
• RoHS and phthalate compliant
– Typical Applications
• PXI-104x series chassis with rear-mounted fans
• PXIe-106x and PXIe-108x series (excluding PXIe-1083 and PXIe-1088)
• PXIe-109x series (excluding PXIe-1090)
• PXIe-107x series with below-cage fans (excluding PXIe-1075, PXIe-1083, PXIe-1088, PXIe-1090)
• PXI-103x series with below-cage fan locations
– Compatibility & Integration
The NI 199198-01 requires PXI or PXI Express filler panels (sold separately) for complete slot coverage. Installation involves mounting one blocker per empty slot, then securing the corresponding filler panel with captive screws to the chassis. Not recommended for dual-stacked chassis configurations. Compatible with standard PXI system controllers and peripheral modules. Environmental compliance documentation available at ni.com/environment.
