HP / Agilent 34921A 40-Channel Armature Multiplexer for 34980A
The HP/Agilent 34921A is a 40-channel armature multiplexer module designed for use with the 34980A Multifunction Switch/Measure Unit. It provides versatile signal routing for automated testing and data acquisition systems. This module features low thermal offset and high isolation, making it suitable for precision measurement applications.
- Model
- HP / Agilent 34921A
- Calibration
- Available on request
- Price
- $562
- Status
- In stock
- RFQ ref
- 34921A
This unit
The HP/Agilent 34921A is a 40-channel armature multiplexer module for the 34980A Multifunction Switch/Measure Unit. It delivers high-density signal routing with low thermal offset performance, supporting mixed 2-wire and 4-wire configurations for automated test and data acquisition systems. The module features latching armature relays with integrated relay life monitoring and direct AC/DC current measurement capability on four dedicated channels, eliminating the need for external shunts in standard current measurement applications.
Technical Specifications
Channels: 40 (2-wire configuration)
Switch Rating: 300 V, 1 A
Carry Current: 2 A maximum
Scan Rate: 100 channels/second
Configuration: Mixable 2-wire or 4-wire
Thermal Offset: <3 µV
Relay Type: Latching armature with integrated counter
Bandwidth: Up to 45 MHz
Current Measurement Channels: 4 channels (AC/DC, built-in; additional channels via optional shunts)
Key Features
Latching armature relays with integrated relay counter for life monitoring
Low thermal offset (<3 µV) for precision low-level signal measurements
Four direct AC/DC current measurement channels on channels 41–44
Optional terminal blocks (such as 34921T) provide built-in thermocouple reference junctions for temperature measurements with minimal thermal error
50-pin D-sub connectors support standard cables, terminal blocks, and mass interconnect solutions
Safety interlock prevents analog bus connections when not properly configured
Typical Applications General-purpose signal scanning, temperature measurement with thermocouple inputs, direct AC/DC current monitoring, and multi-channel data acquisition in automated test environments.
Compatibility & Integration Designed as a plug-in module for the Agilent 34980A mainframe. When combined with other 34980A modules, enables up to 560 2-wire or 640 1-wire channels across the system. Connects directly to mainframe analog buses for integrated measurement and switching operations.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 1 A switch current, 2 A carry current, up to 1 A current measurement, Up to 300 V |
HP / Agilent 34921A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the HP / Agilent 34921A. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
HP / Agilent 34921A price
This HP / Agilent 34921A is listed at $561.58. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
HP / Agilent 34921A calibration cost
NIST-traceable calibration for the HP / Agilent 34921A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
