The Racal Instruments 1261B-EMS is a VXIbus high-performance mainframe engineered for demanding electronic measurement applications. This 13-slot, fourth-generation mainframe delivers 2000 W of available DC power with minimal ripple and noise, supporting both 7U benchtop and 9U rackmount configurations. The Enhanced Monitoring System (EMS) continuously tracks mainframe health via VXIbus and RS-232 interfaces, enabling predictive maintenance and system optimization.
Technical Specifications
• Mainframe Type: VXIbus, 13-slot architecture
• Form Factor: 7U benchtop or 9U rackmount
• Power Supply: 2000 W available DC power; advanced design delivers high dynamic current with minimal ripple and noise; direct backplane connection
• Certifications: ISO-9001, AS9100, UL 3111-1, IEC1010-1, CSA 22.2 No. 1010.1, CE Marked
• Workmanship Standard: IPC-A-610
– Key Features
Cooling System
• Pressurized plenum with molded card guides for even airflow distribution
• Fault-tolerant design: three rear-pluggable fans; cooling maintained if one fan fails
• Variable-speed fan system (EMS units) adjusts speed based on slot temperature rise
• HI/LO switch (Basic units) for noise minimization or maximum reliability
• Snap-on covers divert air from unused slots
Power Protection
• Over-voltage, under-voltage, over-current, under-current, over-temperature protection
• Short-to-ground and short-between-rails protection
• Quick-check diagnostic connector verifies supply voltages, currents, and VXI signals
Enhanced Monitoring System (EMS)
• Monitors seven VXI voltages and seven VXI currents
• Temperature sensing: ambient plus per-slot sensors
• Fan speed monitoring across three fans
• Custom limit configuration and maintenance interval tracking
• Programmable interrupts on out-of-limit conditions
• Advanced triggering circuit with external connector and programmable delay for external handshaking
• Status readout via front panel display, VXI message-based interface, or RS-232
– Compatibility & Integration
• Software Support: SCPI, LabVIEW™, LabWindows™/CVI, VXIplug&play
• API: Microsoft Win32® application programming interfaces
• Communication: VXIbus and RS-232 interfaces for monitoring and control
