HP 3498A Extender Data Acquisition Controller

The HP 3498A is an extender mainframe that expands data acquisition capability within HP 3497A systems. Functioning as a remote acquisition chassis, it accepts up to 10 plug-in assemblies and scales measurement density across analog and digital channels. Up to 13 units can be daisy-chained to a single 3497A controller, delivering maximum channel counts of 1000 analog and 1360 digital with support for 135 total plug-in assemblies across the entire configuration.

– Technical Specifications

Expansion Capacity
• Maximum plug-in assemblies per 3498A: 10
• Maximum 3498A units per 3497A controller: 13
• Total plug-in assembly capacity (full system): 135 assemblies
• Maximum analog channels: 1000
• Maximum digital channels: 1360
• Maximum analog assemblies: 45
• Maximum digital assemblies: 85

Physical & Environmental
• Dimensions: 190.5 mm H × 428.6 mm W × 520.7 mm D (7″ × 16″ × 20″)
• Operating temperature: 0°C to 55°C
• Non-operating temperature: -40°C to 75°C
• Humidity: Up to 95% at 40°C
• Power input: 110, 120, 220, or 240 V ±10%, 48–66 Hz, 150 VA

– Key Features

• Requires HP 3497A mainframe for control and communication via HP-IB interface
• Supports relay multiplexers with thermocouple compensation, FET multiplexers, and digital input/interrupt assemblies
• Compatible with counter, strain gage, bridge completion, actuator, and D/A converter modules
• Includes breadboard assembly option (Option 140) for custom measurement implementations
• Connecting cables supplied

– Compatibility & Integration

The 3498A integrates directly with the HP 3497A data acquisition controller, accepting all standard plug-in assembly types. Control and data communication occur through the HP-IB interface. This architecture enables modular scaling from baseline 5-assembly systems up to 135-assembly installations without redesigning measurement infrastructure.