3740-ST

Model 3740 Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 1-888-KEITHLEY www.keithley.com 32 Channel Isolated Switch Card Specifications 28 Form C relays and 4 high power Form A relays RELAY SWITCH CONFIGURATION: 32 general purpose independent channels. 28 channels of FORM C switching at 2A and 4 channels of FORM A switching at 7A. Relays can be connected to each other and backplane via removable terminal blocks. CONTACT CONFIGURATION: GENERAL PURPOSE: 1 pole FORM C. HIGH CURRENT: 1 pole FORM A CONNECTOR TYPE: Two 50 pin male D-shells. MODEL 3740-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with .062 inch O.D. 84 conductors maximum. #16 AWG maximum wire size with .092inch O.D. 44 conductors per card maximum. MAXIMUM SIGNAL LEVEL: FORM C: 300V DC or RMS, 2A switched (3A carry), 60W, 125VA. FORM A: 250VAC 7A, 30VDC 7A, 210W COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis. VOLT-HERTZ LIMIT: 8x107. CONTACT LIFE: FORM C > 105 operations at max signal level. FORM C >108 operations no load.1 FORM A > 105 operations at max signal level. FORM A > 5x107 operations no load 1 CHANNEL RESISTANCE :< .5 Ω at end of contact life CONTACT POTENTIAL: ≤ ±3µV typical per contact ISOLATION: CHANNEL TO CHANNEL: >109Ω, 1010Ω,