The Keysight 34938A is a high power general-purpose switch module for the 34980A Multifunction Switch/Measure Unit. It has 20 independent single-pole, single-throw (SPST) 5A relays. This module is used to cycle power to products under test, control indicator and status lights, and to actuate external power relays and solenoids. Its 30VDC/250VAC, 5A contacts can handle up to 150W on a single channel, enough for many power line switching applications. Standard 50-pin Dsub connectors allow for use with standard cables, terminal blocks, or mass interconnect solutions.
| Key Features |
| 20 Form A channels up to 5A, 150W |
| Armature latching relays, with relay counter |
| Temperature sensor for overheating conditions |
| Simultaneous channel switching |
| Specifications |
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| Multifunction Switch/Measurement Unit |
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| Model Overview |
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| Model | Description | Information |
| 34980A | Multifunction data acquisition mainframe
Holds up to 8 Plug-in-Modules
| Comes standard with “DMM” option and BenchVue DAQ |
| BV0006B | BenchVue Data Acquisition Control and Analysis (DAQ)
Holds up to 8 Plug-in-Modules
| BenchVue makes it simple to connect, control instruments, and automate test sequences.
Supported plug-in modules:
34921A
34922A
34923A
34924A
34925A
34931A
34932A
34933A
34937A
34938A
34952A
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| Specifications |
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| Multifunction Switch / Measure Low Frequency Modules |
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| Module Overview |
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| Model | Description | Max. Volts | Max. Current | Scan Ch/Sec |
| Multiplexers |
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| 34921A | 40 Channel Armature | +/- 300V | 1A | 100 |
| 34922A | 40 Channel Armature | +/- 300V | 1A | 100 |
| 34923A | 40/80 Channel Reed | +/- 150V | 0.5A | 500 |
| 34924A | 70 Channel Reed | +/- 150V | 0.5A | 500 |
| 34925A | 40/80 Channel Optically Isolated FET Multiplexer | +/- 80V | 0.5A | 1000 |
| Matrix Switches |
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| 34931A | Dual 4x8 Armature | +/- 300V | 1A | 100 |
| 34932A | Dual 4x16 Armature | +/- 300V | 1A | 100 |
| 34933A | Dual/Quad 4x8 Reed | +/- 150V | 0.5A | 500 |
| GP/Actuator Switches |
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| 34937A | 28 Channel Form C
4 Channel Form A
| 300V
250AC
| 1A
5A
| N/A
N/A
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| 34938A | 20 Channel 5 Amp Form A | 250AC | 5A | N/A |
| Specifications |
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| Multifunction Switch / Measure RF and Microwave Modules |
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| Module Overview |
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| Model | Description | Insertion Loss | Frequency Range | VSWR |
| RF Switching |
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| 34941A | Quad 1x4 50Ohm | 0.6 dB | 3 GHz | < 1.25 |
| 34942A | Quad 1x4 75Ohm | Contact Factory | Contact Factory | Contact Factory |
| Microwave Switching |
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| 34945A | Microwave Switch/ Attenuator Drive | Drive up to 64 external switch coils;
32 SPDT switches
8 multiport switches
8 attenuators
or custom combination
| Drive up to 64 external switch coils;
32 SPDT switches
8 multiport switches
8 attenuators
or custom combination
| Drive up to 64 external switch coils;
32 SPDT switches
8 multiport switches
8 attenuators
or custom combination
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| 34946A | Dual 1x2 SPDT Terminated | < 0.42dB to < 0.69dB | 4 GHz or 20 GHz | < 1.15 to < 1.30 |
| 34947A | Triple 1x2 SPDT Unterminated | < 0.42dB to < 0.69dB | 4 GHz or 20 GHz | < 1.15 to < 1.30 |
| Specifications |
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| Multifunction Switch / Measure System Measurement and Control Modules |
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| Module Overview |
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| Model | Description | Information |
| 34950A | 64 Bit DIO with Memory Counter | Eight 8-bit digital I/O channels
Up to 5 V thresholds
7 handshaking protocols
Pattern memory
Two 10 MHz frequency counter/totalizers
10 MHz programmable clock output
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| 34951A | 4 Channel Isolated D/A Converter with Waveform Memory | Output DC V up to +/-16V or DC current up to +/-20 mA
Output wave forms w/200 kHz update rate and 16 bit resolution
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| 34952A | Multifunction Module with 32 Bit DIO, 2 Channel D/A and Totalizer | Four 8-bit digital I/O channels
2 +/- 12V analog outputs
100 kHz gated totalizer
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| 34959A | Breadboard | Access to +12V and +5V supplies
16 GPIO ports
32 relay drive lines for custom designs
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| Specifications |
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| 34980A Data Acquisition System Module Overview |
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| Model | Description |
Terminal Blocks used for Discrete Wiring.
Supports 20 AWG Wire for 100 Connections
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| 3492xT | Multiplexer terminal blocks |
| 3493xT | Matrix and GP terminal blocks |
| 3495xT | Measurement and control terminal blocks |
