Agilent/Keysight E1347A

The Agilent/Keysight E1347A is a B-size, 1-slot, register-based VXI reed relay multiplexer engineered for precision analog signal switching and multiparameter data acquisition within VXIbus systems. The module delivers 16-channel 3-wire and 8-channel 4-wire multiplexing with break-before-make reed relays, low-thermal offset (<4 µV differential per channel), and built-in cold-junction compensation for thermocouple measurements. When paired with compatible Agilent VXI Digital Multimeters—such as the E1326B or E1411B—the E1347A enables temperature, voltage, current, and resistance (2-wire and 4-wire) measurements with automatic calibration and 0.3 °C reference junction accuracy across the 18 to 28 °C operating range.

– Technical Specifications

• Module Form Factor: B-size, 1-slot, register-based VXI
• Multiplexer Configuration: 16-channel 3-wire / 8-channel 4-wire
• Relay Type: Reed relays, break-before-make action
• Relay Life: 10⁸ operations (no load); 10⁷ operations (rated load)
• Thermal Offset: <4 µV per channel, differential
• Maximum Voltage: 120 Vdc / 120 V rms AC (any terminal to any other terminal or chassis)
• Maximum Current: 50 mA per channel (non-inductive, common)
• Maximum Power per Channel: 1 VA
• Reference Junction Accuracy: 0.3 °C (18–28 °C operating temperature)
• Scanning Rate: 600 channels/s (typical)
• Terminal Connections: Screw terminals, 16–26 AWG wire (0.5–1.5 mm)
• Component Card: E1345-66201

– Key Features

• Built-in thermistor reference junction for automatic cold-junction compensation
• Low-thermal offset reed relays minimize measurement error in precision circuits
• Relays open at power-up and power-down for safe default state
• Register-based VXIbus communication for deterministic control
• Includes analog bus cable for slot-adjacent module interconnection

– Typical Applications

• Thermocouple and resistance thermometer (RTD) scanning
• Multipoint voltage and current measurement systems
• Low-level analog multiplexing requiring thermal stability
• Automated test equipment (ATE) with precision data acquisition

– Compatibility & Integration

The E1347A integrates into B-size VXIbus mainframes (E1300B, E1301B) and adapts to C-size systems via the E1403C active adapter. Functionally equivalent to the E1345A, it pairs with Agilent VXI DMMs for enhanced measurement capabilities including temperature compensation and multiparameter analysis.