Tektronix 3721

The 3721 offers two independent banks of 1×20 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 analog backplane connection relays. This connection allows the mainframe to reconfigure the 3721 as a single 1×40 two-pole multiplexer or to enable card-to-card expansion for even larger configurations.

The 3721 uses two 50-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC, use the detachable 3721-ST accessory.

Key Features

• 40 two-pole or 20 four-pole channels for general purpose switching
• 2 dedicated channels for current measurements, 3 A capacity
• Automatic CJC for temperature measurements when used with 3721-ST accessory
• 4-wire common side ohms input supports 40 channels of 4-wire ohms measurements
• Analog backplane connection relays provide easy bank and card interconnections
• 300 V, 2 A switched or 3 A carry signal capacity; 60 Ω, 125 VA
• Latching electromechanical relays