Agilent/Keysight E8491A

The Agilent/Keysight E8491A is an IEEE-1394 (FireWire) to VXI interface module that bridges a PC's IEEE-1394 bus with a VXI mainframe. Housed in a C-size, single-slot form factor, it functions as a message-based commander and Resource Manager, residing in Slot 0 of the VXI mainframe. The E8491A enables data block transfers between PC and VXI systems, supporting control and data acquisition from VXI instruments across multiple mainframes.

Up to 16 VXI mainframes can be managed from a single PC via daisy-chain or star configuration. Hot-plugging capability simplifies system reconfiguration without powering down.

Technical Specifications

Data Transfer Performance

• Maximum sustained data transfer (16-bit): 14 MB/sec


• Maximum backplane burst rate (16-bit): 13 MB/sec


• Shared memory: 128 kB


• Bus support: A16, A24, A32, D08, D16, D32, D64 Interface and Connectivity


• Interface type: IEEE-1394 (FireWire)


• VXI module size: C-size, 1-slot


• Included cable length: 4.5 meters


• IEEE-1394 ports (Option 001 host adapter): 3 external ports


• Multiple mainframe interconnection: Daisy-chain or star configuration Power Consumption


• +5 V: 2.5 A (IPM), 0.001 A (IDM)


• +12 V: 0.35 A (IPM), 0.050 A (IDM)


• –12 V: 0.015 A (IPM), 0.001 A (IDM)


• –5.2 V: 0.180 A (IPM), 0.001 A (IDM)


• –2 V: 0.360 A (IPM), 0.001 A (IDM)


• IEEE-1394 device power (Option 001): 12 V at up to 1.5 A

Key Features

• Message-based commander with Resource Manager functionality


• Hot-plugging support for dynamic reconfiguration


• 4.5 meter FireWire cable included


• Supports up to 16 mainframes per PC


• 128 kB shared memory for efficient data buffering


• RoHS compliant and CE marked

Compatibility & Integration Operating Systems: Windows 95, Windows 98, Windows Me, Windows NT 4.0, Windows 2000, Windows 7 Software Support: SICL/VISA, VISA COM; 32-bit Interpreted SCPI (I-SCPI); VXIplug&play compliant Programming Languages: C/C++, Visual Basic, Agilent VEE, LabVIEW/VISA Regulatory: IEC 61010-1, CSA C22.2 #1010.1:1992, CISPR 22 Class A, CISPR 11 Group 1 Class A