Datasheet
DIGITAL MULTIMETERS & SYSTEMS
A Greater Measure of Confidence
www.keithley.com
1.888.KEITHLEY
(U.S. only)
Ordering Information
7701 32-channel, Differential
Multiplexer Module
Accessories Supplied
Two mating IDC connectors for
ribbon cable
• Configurable for 32 channels of
differential measurements, with
up to 16 channels of 4-pole
measurements
• Two female D-shell connectors
are standard for secure hook-up
and quick teardown
• 150V, 1A capacity for voltage
channels; 60W, 125VA
• Relay closures stored in
onboard memory
• Screw terminal jumpers
allow user-configurable DMM
connections
CAPABILITIES
CHANNELS 1–32: Multiplex one of 32 2-pole or one of 16
4-pole signals into DMM. Configuration supports dual 1×16
independent multi plexers.
INPUTS
MAXIMUM SIGNAL LEVEL: Any channel to Any Channel
(1–32): 150V DC or 150Vrms (212V peak) for AC waveforms,
1A switched, 60W, 125VA maximum.
SAFETY: Conforms to European Union Directive 73/23/
EEC EN61010-1, CAT I.
CONTACT LIFE (typ): >10
5
operations at max. signal level.
>10
8
operations no load
1
.
1
Minimum signal level 10mV, 10µA.
CONTACT RESISTANCE: <1W any path and additional 1W at
end of contact life.
CONTACT POTENTIAL: <6µV per contact pair.
OFFSET CURRENT: <100pA.
CONNECTOR TYPE: 50-pin female D-shell, Channels 1–24.
25-pin female D-shell, Channels 25–32.
Supplied with male IDC ribbon cable connectors.
ISOLATION BETWEEN ANY TWO TERMINALS: >10
9
W,
<200pF.
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >10
9
W,
<400pF.
CROSS TALK (1MHz, 50W Load): <–35dB.
INSERTION LOSS (50W Source, 50W Load): < 0.35 dB b elow
1MHz. <3dB below 2MHz.
COMMON MODE VOLTAGE: 300VDC or 300Vrms (425V peak)
for AC waveforms between any terminal and chassis.
GENERAL
32 CHANNELS: 32 channels of 2-pole relay input. All channels
configur a ble to 4-pole.
RELAY TYPE: Latching electromechanical.
ACTUATION TIME: <3ms.
FIRMWARE: Specified for Model 2700 rev. B03, Model 2701 rev.
A01, and Model 2750 rev. A01 or higher.
DMM CONNECTIONS: Screw terminals provide internal DMM
connections to channels 34 and 35 and connections to exter-
nal wiring access.
ENVIRONMENTAL
OPERATING ENVIRONMENT: Specified for 0°C to 50°C.
Specified to 50% R.H. at 35°C.
STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: <0.52kg (1.16 lb).
ACCESSORIES AVAILABLE
7789 50/25 Pin Male D-Shell Solder Cup Connectors
7790 50/50/25 Pin Female/Male D-Shell
IDC Connectors
7705-MTC-2 50 Pin Male to Female D-sub Cable, 2m (6.6 ft).
7707-MTC-2 25 Pin Male to Female D-sub Cable, 2m (6.6 ft).
The Model 7701 plug-in module offers 32
channels of 2-pole or 16 channels of 4-pole
multiplexer switching. Its 32 channels can be
configured for common-side 4-wire ohms. They
can also be configured as two independent
banks of multiplexers. It is ideal for RTD or
thermistor temperature applications.
Channel 1
HI
LO
Channel 16
HI
LO
(Channels 2–15)
Channel 17
HI
LO
Channel 32
HI
LO
(Channels 18–31)
Backplane
Isolation
HI
LO
Backplane
Isolation
HI
LO
DMM Input
Channel 33
2-Pole (Open)
4-Pole (Closed)
(see Note)
To
Internal
DMM
NOTE: Channels 33–35 in this schematic refer to the designations
used for control and not actual available channels.
For more information, refer to the ROUTE:MULT command
section in the Model 2700, 2701, or 2750 User’s Manual.
Channel 35
(see Note)
Channel 34
(see Note)
Multiplexer 1
HI
LO
Screw
Terminals
Screw
Terminals
The Model 7701 is rated for low-voltage applications.
When connecting the 7701 to the internal DMM via
the screw terminals, all other modules in the
mainframe must be derated to 150VDC or 150Vrms
(212V peak) for AC waveforms.
HI
LO
HI
LO
DMM Sense
Multiplexer 2
HI
LO
External
W
iring Access
User
Configurable
Screw
Terminals
7701
32-channel Differential
Multiplexer Module
SERVICES AVAILABLE
7701-3Y-EW 1-year factory warranty extended to 3 years
from date of shipment
Use with Integra Series mainframes: 2700, 2701, 2750
Use with Integra Series mainframes: 2700, 2701, 2750