Agilent / Keysight 34938A 20-Channel 5A Form A Switch for 34980A
The Agilent/Keysight 34938A is a 20-channel, 5A Form A switch module designed for use with the 34980A Multifunction Switch/Measure Unit. It provides high-density switching for various signal routing applications, ideal for automated testing and data acquisition systems.
- Model
- Agilent / Keysight 34938A
- Calibration
- Available on request
- Price
- $724
- Status
- In stock
- RFQ ref
- 34938A
This unit
The Keysight 34938A is a 20-channel Form A switch module for the 34980A Multifunction Switch/Measure Unit, delivering high-density power switching and signal routing in automated test systems. Each of the 20 independent SPST relays handles 5 A continuous current and 150 W maximum power, supporting voltages to 30 VDC or 250 VAC. The module uses armature latching relays with a hardware jumper to define power-fail behavior - relays can either open or maintain state on power loss.
Built-in relay counter and temperature sensor provide operational monitoring and overheating protection. Standard 50-pin D-sub connectors enable direct connection to cables, terminal blocks, or mass interconnect solutions.
Technical Specifications
- Channels: 20 Form A (SPST)
- Current Rating: 5 A per channel
- Maximum Power: 150 W per channel
- Voltage Rating: 30 VDC / 250 VAC
- Relay Type: Armature latching relays
- Operating Temperature: 0 °C to +55 °C
- Connector: Standard 50-pin D-sub
- Module Dimensions: 27 mm H × 280 mm L × 170 mm W
Key Features
- Simultaneous switching across all 20 channels
- Relay counter for cycle tracking
- Temperature sensor with overheating detection
- Hardware jumper configuration for power-fail state definition
- 50-pin D-sub connectors with standard cable compatibility
Typical Applications
- Power cycling of devices under test
- Control of indicator and status lights
- External power relay and solenoid actuation
- Digital output and device actuation in test automation
- General-purpose signal routing in data acquisition systems
Compatibility & Integration The 34938A installs directly into the Keysight 34980A mainframe. Accessory options include the 34938T Terminal Block, 50-pin M/F D-sub cables (Y1135A at 1.5 m or Y1136A at 3 m), and the Y1139A 50-pin female solder cup connector kit.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | ±30 VDC / 250 VAC, 0-5 A switching, 0-8 A carry |
Agilent / Keysight 34938A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight 34938A. Calibration covers analog input channel accuracy and offset at all gain settings, analog output accuracy, digital I/O logic threshold verification, sample rate and timing accuracy, and trigger and synchronization bus functional verification. NI CompactRIO and PXI chassis also undergo backplane trigger line integrity check.. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Agilent / Keysight 34938A faults: power supply failure (cRIO-9073/9074), C-series slot connector wear, PXI chassis fan failure, GPIB interface failure on VXI controllers, BIOS/EEPROM corruption. NI CompactRIO most common faults are power supply failure on older cRIO-9073/9074 chassis and C-series module slot connector wear from repeated hot-swap cycles. PXI chassis fan failure is the most common wear item — chassis fans are field-replaceable. VXI embedded controllers most commonly develop EEPROM corruption and GPIB interface failure.
Agilent / Keysight 34938A price
This Agilent / Keysight 34938A is listed at $723.58. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight 34938A calibration cost
NIST-traceable calibration for the Agilent / Keysight 34938A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers analog input channel accuracy and offset at all gain settings, analog output accuracy, digital I/O logic threshold verification, sample rate and timing accuracy, and trigger and synchronization bus functional verification. NI CompactRIO and PXI chassis also undergo backplane trigger line integrity check.. Turnaround is 1 to 3 business days after receipt. See full calibration details →
