7702 40-Channel Differential
Channel 1
HI
LO
Channel 20
HI
LO
(Channels 2–19)
Channel 21
HI
LO
Channel 40
HI
LO
(Channels 22–39)
Channel 41
HI
LO
Channel 42
HI
LO
AMPS
HI
LO
Sense
HI
LO
Input
Channel 43
2-Pole (Open)
4-Pole (Closed)
(see Note)
3A
3A
To Model 2700,
2701, or 2750
Backplane
Channel 45
(see Note)
Backplane
isolation
Channel 44
(see Note)
Backplane
isolation
NOTE Channels 43–45 in this schematic
refer to the designations used for
control and not actual available channels.
For more information, r efer to the
ROUTe:MULTiple command section
in the Model 2700, 2701, or 2750 User’s Manual.
Channels 44 and 45 can be individually
controlled using ROUT e:MULTiple if the
module is not to be connected to the
internal DMM.
Car d Sense
HI
LO
Car d Input
HI
LO
• 40 channels for general-purpose
measurements, plus 2 channels
to measure current
Two- or four-wire measurement
•
• Oversize screw terminal
connection blocks are standard
for easier connection
• 300V, 1A capacity for voltage
channels; 60W, 125VA
• 3A capacity for current channels
• Relay closures stored in onboard
memory
Ordering Information
7702 40-Channel Differential
Multiplexer Module with
Screw Terminals
Multiplexer Module
The Model 7702 plug-in module offers 40 channels of 2-pole or 20 channels of 4-pole multiplexer
switching that can be configured as two independent banks of multiplexers. The Model 7702
provides two additional protected channels for
current measurements. It is ideal for RTD, thermistor, and thermocouple temperature applications.
with Screw Terminals
CAPABILITIES
HANNELS 1-40:Multiplex one of 40 2-pole or one of 20 4-pole
C
ignals into DMM.
s
CHANNELS 41-42: Multiplex one of 2 2-pole current signals into
DMM.
UTS
INP
AXIMUM SIGNAL LEVEL:
M
hannels (1-40):
C
maximum.
Channels (41-42): 60V DC or 30V rms, 3A switched, 60W,
25VA maximum.
1
ONTACT LIFE (typ):>10
C
ONTACT RESISTANCE:<1
C
ONTACT POTENTIAL:
C
<±500nV typical per contact, 1µV max.
<±500nV typical per contact pair,
OFFSET CURRENT: <100pA.
CONNECTOR TYPE: Screw terminal, #20 AWG wire size.
SOLATION BETWEEN ANY TWO TERMINALS:>10
I
<100pF.
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >109Ω,
<200pF.
CROSS TALK (10MHz, 50Ω Load): <–40dB.
INSERTION LOSS (50Ω Source, 50Ω Load): <0.1dB below
1MHz. <3dB below 2MHz.
COMMON MODE VOLTAGE: 300V between any terminal and
chassis.
00V DC or rms, 1A switched, 60W, 125VA
3
5
perations at max signal level.
o
8
10
>
perations cold switching.
o
t end of contact life.
Ω a
max.
1µV
10
Ω,
1.888.KEITHLEY
www.keithley.com
(U.S. only)
A GR
TER M
EA
EASU
GENERAL
40 CHANNELS: 40 channels of 2-pole relay input.
2 CHANNELS: 2 channels of current only input.
RELAY TYPE: Latching electromechanical.
ACTUATION TIME: <3ms.
FIRMWARE: Specified for Model 2700 rev. A01, 2701 rev. A01, and
2750 rev. A01 or higher.
All channels configurable to 4-pole.
ENVIRONMENTAL
OPERATING ENVIRONMENT: Specified for 0°C to 50°C.
STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.5kg (1.1 lb).
RE OF CONFIDENCE
Specified to 80% R.H. at 35°C.
Use with Integra Series Mainframes: 2700, 2701, 2750
DIGITAL MULTIMETERS & SYSTEMS
49
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