Keithley 3720 Dual 1x30 Multiplexer Card, 60 Channel, 300V, 2A Max, 1A Switched, For 3700/A Series
Our Part #19173.1
Condition:New
Mfr Part #3720
- Description
- Specifications
- Documents
Keithley 3720 Dual 1 x 30 Multiplexer Card – 60-Channel General Purpose Switching Module for Series 3700A
Buy the Keithley 3720 Multiplexer Card from TestEquity – Your Authorized Tektronix/Keithley Distributor
Product Overview
The Keithley 3720 Dual 1 x 30 Multiplexer Card is a high-performance plug-in module designed for the Series 3700A System Switch/Multimeter mainframe. Offering 60 differential channels (or 30 four-pole channels), this versatile multiplexer card is engineered for general-purpose switching applications, including precision temperature measurements with thermocouple support.
Key Features & Benefits
- 60 Two-Pole Channels or 30 Four-Pole Channels for flexible general-purpose switching configurations
- Automatic Cold Junction Compensation (CJC) for accurate thermocouple temperature measurements when paired with the 3720-ST accessory
- Analog Backplane Connection Relays enable seamless bank-to-bank and card-to-card interconnections
- 300V, 1A Switched / 2A Carry Signal Capacity (60W, 125VA) for demanding test applications
- Latching Electromechanical Relays with relay closures stored in onboard memory for reliable operation
- 30 MHz Bandwidth (Dual 1 x 30 configuration) for high-frequency signal switching
- Screw Terminal Connections available with the removable 3720-ST accessory
- Two 78-Pin Male D-Sub Connectors for secure, high-density signal connections
Technical Specifications
| Specification | Value |
|---|---|
| Multiplexer Configuration | Two independent 1 x 30 2-pole multiplexers |
| Channel Count | 60 channels (2-pole) or 30 channels (4-pole) |
| Maximum Signal Level | 300V DC/RMS, 1A switched, 2A carry, 60W, 125VA |
| Common Mode Voltage | 300V DC/RMS between terminal and chassis |
| Contact Configuration | 2-pole Form A |
| Channel Resistance | <1.0Ω (Dual 1 x 30), <1.5Ω (Single 1 x 60) |
| Contact Potential | <±1μV (Dual), <±3μV (Single) |
| Offset Current | <±250 pA |
| Bandwidth | 30 MHz (Dual 1 x 30), 10 MHz (Single 1 x 60) |
| Actuation Time | 4 ms |
| Contact Life | >10⁵ operations at max signal; >10⁸ operations no load |
| Connector Type | Two 78-pin male D-sub connectors |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -25°C to 65°C |
| Weight | 2.5 lbs (1.13 kg) |
Scanning Performance
- Switch Only: >120 channels/second (sequential scanning)
- DCV or 2W Ohms: >110 channels/second
- Thermocouple: >110 channels/second
- 3- or 4-Wire RTD: >100 channels/second
- 4-Wire Ohms: >100 channels/second
Ideal Applications
The Keithley 3720 multiplexer card is ideal for:
- Temperature Monitoring & Data Acquisition – Multi-point thermocouple measurements with automatic CJC
- Automated Test Equipment (ATE) – High-channel-count switching for production test systems
- Environmental Stress Screening (ESS) – Multi-channel temperature and voltage monitoring
- R&D Laboratory Testing – General-purpose signal routing and measurement applications
- Manufacturing Test Systems – Component and PCB testing with flexible channel configurations
System Compatibility
The 3720 card is designed for use with the Keithley/Tektronix Series 3700A System Switch/Multimeter mainframes, including:
- Model 3706A-S (6-slot mainframe)
- Model 3706A-SNFP (6-slot, no front panel)
- Earlier 3700 Series mainframes
Flexible Configuration Options
The Model 3720 offers exceptional flexibility through its dual-bank architecture:
- Operate as two independent 1 x 30 multiplexers for isolated measurements
- Reconfigure as a single 1 x 60 two-pole multiplexer via backplane relays
- Enable card-to-card expansion for larger system configurations
- Convert to coordinated four-pole operation for enhanced measurement accuracy
Available Accessories
- 3720-ST – Screw Terminal Block with CJC sensor (required for thermocouple measurements)
- 3720-MTC-1.5 – 78-Pin D-sub Female to Male Cable, 1.5m (5 ft.)
- 3720-MTC-3 – 78-Pin D-sub Female to Male Cable, 3m (10 ft.)
- 3791-KIT78-R – 78-Pin Female D-sub Connector Kit
- 3791-CIT – Contact Insertion and Extraction Tool
Extended Warranty & Calibration Services
- 3720-3Y-EW-STD – Extend 1-year factory warranty to 3 years
- 3720-5Y-EW-STD – Extend 1-year factory warranty to 5 years
- C/3720-3Y-STD – 3 Z540-1 compliant calibrations within 3 years
Order the Keithley 3720 Dual 1 x 30 Multiplexer Card today and optimize your multi-channel switching and data acquisition applications.