Datasheet

www.keithley.com
1.888.KEITHLEY
(U.S. only)
24
SWITCHING AND CONTROL
A GREATER MEASURE OF CONFIDENCE
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
NC
NO
Channel 13
COM
NC
NO
Channel 28
COM
Channels 14–27
NC
NO
Channel 1
COM
NC
NO
Channel 12
COM
Channels 2–11
Channel 29
Channel 32
Channels 30–31
Terminal
Blocks
To Series 3700A Mainframe Analog Backplane
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 0.062 inch O.D.
84 conductors maximum. #16 AWG maximum wire size with 0.092 inch 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: 8×10
7
.
CONTACT LIFE: Form C: >10
5
operations at maximum signal level. >10
8
operations no load.
1
Form A: >10
5
operations at maximum signal level, >5×10
7
operations no load.
1
CHANNEL RESISTANCE (end of contact life): <0.5 W.
CONTACT POTENTIAL: <±3μV typical per contact.
ISOLATION: Channel-channel: 10
9
W , <200pF. Common Mode: >10
10
W , <150pF.
Crosstalk (Channel-channel, 50
W load–50 W source): 100kHz: <–50dB. 1MHz: <–35dB.
10MHz: <–15dB.
BANDWIDTH: 30MHz.
GENERAL
OVER-TEMPERATURE: Temperature sensor indicates over temperature.
ACTUATION TIME: Form C: 4ms. Form A: 10ms.
RELAY TYPE: Form C: Latching electromechanical. Form A: Nonlatching electromechanical.
RELAY DRIVE SCHEME: Direct.
INTERLOCK: Backplane relays disabled when interlock connection is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C. Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.5 lbs.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
NOTES
1. Minimum signal level 10mV, 10μA.
3740
32-channel Isolated Switch Card
28 Form C relays and 4 high power Form A relays
Model 3740 specifications Model 3740 specifications