7706 Keithley Switch Card

Additional Features:

• 20 channels of analog input (w/automatic CJC) for generalpurpose measurements
• 16 channels of digital output
• 2 analog outputs (±12V, 5mA)
• 300V, 1A capacity, 60W, 125VA maximum
• Configurable as two independent banks of multiplexers
• Relay closures stored in onboard memory
• For use with Integra Series mainframes: 2700, 2701, 2750

Capabilities

• Channels 1–20: Multiplex one of 20 2-pole or one of 10 4-pole signals into DMM
• Channels 21–25 are referenced to chassis ground
• Channels 21–22: 16 Digital Outputs
• Channels 23–24: Analog Voltage Output (2)
• Channels 25: Totalize Input

Inputs

• Maximum Signal Level (Channels 1–20): 300V DC or rms, 1A switched, 60W, 125VA maximum
• Contact Life (typ.): &gt,10.5 operations at max. signal level, &gt,10.8 operations no load**Minimum signal level 10mV, 10μA
• Contact Resistance: &lt,1Ω at end of contact life
• Contact Potential: &lt,±2μV typical per contact, 3μV max.
• Offset Currenbt: &lt,100pA
• Connector Type: Screw terminal, #20 AWG wire size
• Isolation Between any two Terminals: &gt,109Ω, &lt,100pF
• Isolation Between any Terminal and Earth: &gt,109Ω, &lt,200pF
• Cross Talk (10MHz, 50W Load): &lt,–35dB
• Insertion Loss (50W Source, 50Ω Load): &lt,0.1dB below 1MHz. &lt,3dB below 2MHz
• Common Mode Voltage: 300V between any terminal and chassis
• Temperature Accuracy using Internal CJC: 1.0°C (see mainframe specification for details)

Totalize Input

• Maximum Count: 2/32–1.
• Totalize Input: 100kHz (max), rising or falling edge, programmable
• Signal Level: 1Vp-p (min), 42Vpk (max)
• Threshold: 0V or TTL, jumper selectable
• Gate Input: TTL-Hi, TTL-Lo, or none
• Count Reset: Manual or Read+Reset
• Read Speed: 50/s

Analog Voltage Output

• DAC 1, 2: ±12V in 1mV increments, nonisolated
• Resolution: 1mV
• Iout: 5mA max.
• Settleing Time: 1ms to 0.01% of output
• Accuracy ±(% of output + mV): 1 year ±5°C: 0.15% + 19mV, 90 day ±5°C: 0.1% + 19mV, 24 hour ±1°C: 0.04% + 19mV
• Temperature Coefficient: ±(0.015% + 1mV)/°C

Digital Output

• V OUT(L): &lt,0.8V @ Iout = 400mA
• V OUT(H): &gt,2.4V @ Iout = 1mA
• V OUT(H)MAX.: &lt,42V with external open drain pull-up
• Write Speed: 50/s

General

• 20 Channels: 20 channels of 2-pole relay input. All channels configurable to 4-pole.
• Relay Type: Latching electromechanical
• Actuation Time: &lt,3ms
• Firmware: Specified for Model 2700 rev. A02 or B01, 2701 rev. A01, and 2750 rev. A01 or higher

Environmental

• Operating Environment: Specified for 0° to 50°C. Specified to 80% R.H. at 35°C
• Storage Environment: –25° to 65°C
• Weight: 0.5kg (1.1 lbs)

The Keithley 7706 plug-in module offers 20 channelsof 2-pole or 10 channels of 4-pole multiplexer switching with automatic CJC, as well as two analog output channels, 16 digital outputs,and one event counter/totalizer. The event counter/totalizer can be used to monitor and control system components, such as fixtures, limit switches, pass/fail indicators, external voltage sources, loads, door closures, revolutions, etc., while performing mixed signal measurements. The Keithley 7706 is ideal for RTD, thermistor, and thermocouple temperature applications.

Технические характеристики