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Model 3721
Keithley Instruments, Inc. Dual 1x20 Channel Multiplexer Specifications
28775 Aurora Road
Cleveland, Ohio 44139 40 differential channels, automatic CJC w/3721-ST accessory
1-888-KEITHLEY
www.keithley.com
MULTIPLEXER CONFIGURATION: Two independent 1x 20 2-pole Multiplexers. Banks can be connected together
via relay creating a single 1 x 40 Multiplexer. Banks can be isolated from the backplane by relays. Card can be
configured for common side Ohm measurement via back plane relays.
Channel (41-42): Multiplex one of two 2-pole current signals into DMM
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 50 pin male D-shells. Removable screw terminal option.
MAXIMUM SIGNAL LEVEL:
Channels (1-40): 300V DC or RMS, 2A switched (3A carry), 60W, 125VA Maximum.
Channels (41-42): 60V DC or 30VRMS, 3A switched, 60W, 125VA Maximum. Fused 3A, 250V RMS
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis. Channels (1-40)
VOLT-HERTZ LIMIT: 8x107
CONTACT LIFE: > 105 operations at max signal level.
> 108 operations no load. 1
Dual 1x20 3 Single 1x40 2, 3
Channel Resistance
< 1.0 < 1.5
(end of contact life)
Contact Potential
<