The Keysight 34907A module for the 34970A/34972A Data Acquisition/Switch Unit allows great flexibility for a variety of sense and control applications. It combines two 8-bit ports of digital input and output, a 100 kHz gated totalizer, and two ±12V analog outputs - all on a single earth-referenced module. The digital inputs and totalizer input may be included in a scan. Alarm limits for the digital and event counter inputs are evaluated continuously, capturing and logging alarm conditions even between scans.
| Key Features |
| 16 bits of digital input and output |
| 100 kHz totalizer input |
| Two +/-12V analog outputs |
| Benefits |
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| Digital Input/Ouput: | Use the digital outputs with an external power supply to control microwave switches and attenuators, solenoids, power relays, indicators, and more. Use the digital inputs to sense limit switch and digital bus status. There are no complex handshake modes; reads and writes are initiated either from the front panel or the bus. |
| Totalize Input: | Count events from devices like photo interrupters, limit switches, and Hall-effect sensors.
It keeps an updated total which can be read via the front panel or programmatically at any time. With 26 bits of resolution, it can count events at full speed for nearly 45 minutes without an overflow.
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| Analog Output: | Use the two electronically calibrated analog outputs to source bias voltages to your device under test, to control your analog programmable power supplies, or use the outputs as setpoints for your control systems. The outputs are programmed directly in volts, either from the front panel or from the bus. |
| 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 |
