Keithley 3721 Dual 1×20 Multiplexer Card
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Keithley 3721 dual 1×20 multiplexer card with 40 switching channels, supporting automatic CJC for temperature measurements and 4-wire ohms testing.
Product details
| Model | 3721 |
| Manufacturer | Keithley |
| Category | DAQ Modules & Cards |
| Availability | Made to order |
Description
Overview
The Keithley 3721 is a dual 1×20 multiplexer card designed for the 3700A series system switch/multimeter. It provides 40 two-pole or 20 four-pole channels for general purpose switching, including temperature measurements. The two independent banks can be expanded or configured as a single 1×40 multiplexer through the analog backplane connection relays.
Key Features
- 40 two-pole or 20 four-pole channels for general purpose switching
- 2 dedicated fused channels for current measurements up to 3 A
- Automatic CJC for temperature measurements when used with 3721-ST accessory
- 4-wire common side ohms input supporting 40 channels of 4-wire resistance measurements
- Analog backplane connection relays for easy bank and card interconnections
- 300 V switched (channels 1–40), 2 A carry signal; 60 V dedicated current channels, 3 A capacity
- Latching electromechanical relays
- Two 50-pin male D-sub connectors for signal connections
Applications
- General purpose signal switching and routing
- Temperature measurement with thermocouple sensors
- Multi-channel data acquisition and automated test systems
- Resistance measurements and ohms testing
Specifications
| Series | 3700 Series |
| Connector Type | Two 50 pin male D-shells. Removable screw terminal option. |
| Maximum Current | 3 A |
| Maximum Voltage | 300 V |
| Number of Channels | 40 Channels |
| Operating Temperature Range | 0-50°C |
| Relative Humidity Range | 0-70% |
| Series Compatibility | 3700A Series |
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Keithley 3721 Dual 1×20 Multiplexer Card
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