3762 Keithley Switch Card

Additional Features:

• Channels Per Card: 10
• Contact Configuration: 2 Form A with user selectable shield or driven guard
• Connector Type: Screw terminals, #16AWG maximum wire size
• Relay Drive Current: 80 mA per relay typical
• Maximum Switching Levels: 1000 V, 0.5 A, 10 W
• Maximum Carry Current: 1 A DC or RMS
• Contact Life: >10∧8 closures (cold switching), >10∧6 closures (hot switching at 1000 V, 1 mA)
• Contact Resistance: <200 mΩ initial, <2 Ω for rated life
• Contact Potential: <35 μV per contact pair
• Warm up: One hour to rated accuracies
• Actuation Time: <2 ms exclusive of mainframe
• Relay type: 2 Form A dry reed
• Relay drive scheme: Direct
• Channel Isolation: >10∧10 Ω, <10 pF
• Differential Input Isolation: >10∧9 Ω, <10 pF
• Common Mode Input Isolation: >10∧9 Ω, <150 pF
• Common Mode Voltage: 1000 V peak
• Operating Environment: 0° to 50°C, 70% relative humidity up to 35° C
• Storage Environment: –25° to 65° C
• Altitude: 0 to 2000 m (0 to 6562 feet) above sea level
• Pollution degree: 2
• Dimensions: 25.40 mm high x 166.12 mm wide x 263.40 mm long (1.00 in. x 6.54 in. x 10.37 in.
• Safety: NRTL listed to UL61010-1 and CAN/CSA C22.2 NO. 61010-1-12; UL 61010-2-030 and CAN/CSA-22.2 NO.61010-2-030-12. Conforms with European Union Low Voltage Directive
• EMC: Conforms to European Union EMC Directive

The 3762 switches voltages up to 1000 V peak or currents up to 0.5 A. The current carry capacity of each relay contact is 1 A. Two-pole relays switch both circuit HI and circuit LO for full floating measurements. A Guard input common to all channels is provided for shielding or as a guard driven by a single instrument. Guards may be isolated by removing resistors installed at each input. Multiple switched guard circuits can be achieved by removing the jumper and connecting circuit Guard to the LO input terminal. The 3760 does not connect to the 6 common buses on the 3706A backplane. Daisy chaining cards can be achieved by using an output channel.