The Keysight 34902A module for the 34970A/34972A Data Acquisition/Switch Unit employs reed relays to achieve scan rates up to 250 channels-per-second. Use this module for high-throughput automated test applications as well as high-speed data logging and monitoring tasks.
Sixteen two-wire inputs switch up to 300 V. Two-and four-wire channels may be mixed on the same module. User provided shunt resistors are required for current measurements.
| Key Features |
| 16 Channel Multiplexer |
| Two- and four-wire scanning |
| 250 ch/s scanning |
| Built-in thermocouple reference junction |
| Specifications |
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34970A and 34972A
Module Overview
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| Module | Type | Speed (ch/sec) | Max Volts | Max Amps | Bandwidth | Thermal Offset | Comments |
34901A
20 ch Multiplexer + 2 current channels
| 2-wire armature (4-wire selectable) | 60 | 300 V | 1A | 10 MHz | < 3 µV | Built-in cold junction reference 2 additional current channels (22 total) |
34902A
16 ch Multiplexer
| 2-wire reed (4-wire selectable) | 250* | 300 V | 50 mA | 10 MHz | < 6 µV | Built-in cold junction reference |
34903A
20 ch Actuator/GP Switch
| SPDT/form C | 120 | 300 V | 1A | 10 MHz | < 3 µV |
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34904A
4 x 8 Matrix
| 2-wire armature | 120 | 300 V | 1A | 10 MHz | < 3 µV |
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34905A
Dual 4 ch RF Mux 50 Ω
| Common low (unterminated) | 60 | 42 V | 0.7 A | 2 GHz | < 6 µV | 1 GHz bandwidth through BNC-to-SMB adapter cable |
34906A
Dual 4 ch RF Mux 75 Ω
| Common low (unterminated) | 60 | 42 V | 0.7 A | 2 GHz | < 6 µV | 1 GHz bandwidth through BNC-to-SMB adapter cable |
34907A
Multifunction Module
| Two 8-bit digital I/O ports |
| 42 V | 400 mA |
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| Open drain |
| 26-bit event counter |
| 42 V |
| 100 KHz |
| Selectable input threshold |
| Two 16-bit analog outputs |
| ± 12 V | 10 mA | dc |
| Max 40 mA total output per frame |
34908A
40 ch Single-Ended Mux
| 1-wire armature (common low | 60 | 300 V | 1A | 10 MHz | < 3 µV | Built-in cold junction reference No four-wire measurements |
Note:
* Up to 250 ch/sec to internal memory. See scanning rates for measurement condition and rate on each instrument.
| Ordering Information |
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| Model Number | Description |
| Mainframe |
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| 34970A | Data Acquisition/Switch Unit with RS-232 and GPIB |
| 34972A | Data Acquisition/Switch Unit with LAN and USB |
| Modules |
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| 34901A | 20-Channel armature multiplexer |
| 34902A | 16-Channel reed multiplexer |
| 34903A | 20-Channel actuator/general purpose switch |
| 34904A | 4 x 8 Two-wire matrix switch |
| 34905A | Dual 4-Channel RF multiplexer, 50 Ohms |
| 34906A | Dual 4-Channel RF multiplexer, 75 Ohms |
| 34907A | Multifunction module |
| 34908A | 40-Channel single-ended multiplexer |
