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Keithley Dual Multiplexer Plug In Card, 37xx Series Keithley 3721, The Keithley 3721 Dual 1x20 Multiplexer Plug In Card that offers two independent banks of 1x20 two pole multiplexers that are ideal for general purpose switching, including temperature measurements. The two banks can automatically be connected to the Series 3700A mainframe backplane and optional DMM through the analogue backplane connection relays. This connection allows the mainframe to reconfigure the 3721 as a single 1x40 two pole multiplexer or to enable card to card expansion for even larger configurations.The 3721 provides a number of other features. In addition to the 40 channels, two fused channels are supplied for current measurements. The module includes dedicated inputs that enable 40 channels of four wire common side ohms measurements. For thermocouple type measurements, automatic cold junction compensation CJC is supported when used with the 3721 ST screw terminal accessory. The 3721 uses two 50 pin male D sub connectors for signal connections. Keithley 3721 Dual 1x20 Multiplexer Card
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