7707 KEITHLEY, 7707 Datasheet - Page 8

• Manufacturer Part Number: 7707
• Description: KEITHLY MULTIPLEXER DIGITAL I/O MODULE
• Manufacturer: KEITHLEY

Specifications of 7707

• Accessory Type: Differential Multiplexer Module
• Features: 10-Channel W/ 32-Channel Digital I/O
• Rohs Compliant: NA
• For Use With: Keithley Models 2700, 2701, And 2750 DMM Data Acquisition Datalogging Systems

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Ordering Information
7708
1.888.KEITHLEY
Cold Junction
Ref ×4
Cold Junction
Ref ×5
7708
40 differential channels for
general-purpose measurements
Two- or four-wire
measurements
300V, 1a capacity for voltage
channels; 60W, 125Va
Oversize screw terminal
connection blocks are standard
for easier connection
relay closures stored in
onboard memory
w w w.keithley.com
Card Input
Card Sense
Channel 1
(Channels 2–19)
Channel 20
Channel 21
(Channels 22–39)
Channel 40
40-channel Differential
Multiplexer Module
with automatic CjC
and Screw Terminals
LO
LO
LO
LO
LO
LO
HI
HI
HI
HI
HI
HI
4-Pole (Closed)
2-Pole (Open)
Channel 41
(see Note)
(U.S. only)
40-channel Differential Multiplexer Module
with Automatic CJC and Screw Terminals
The Model 7708 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
built-in CJC sensors automatically linearize
thermocouples, making the Model 7708 ideal for
RTD, thermistor, and thermocouple temperature
applications. It is also well suited for mixed-
signal measurement applications that require
multi-point monitoring, such as environmental
stress screening.
NOTE:
Channel 42
Backplane
(see Note)
Channel 43
Channels 41–43 in this schematic refer to the
designations used for control and not actual
available channels.
For more information, refer to the ROUTe:MULTiple
command section in the Model 2700, 2701, or
2750 User’s Manual.
Channels 42 and 43 can be individually controlled
using ROUTe:MULTiple if the module is not to be
connected to the internal DMM.
Backplane
(see Note)
isolation
isolation
A
Input
Sense
LO
LO
HI
HI
G R E A T E R
To Model 2700,
2701, or 2750
Backplane
M E A S U R E
CaPaBILITIES
CHANNELS 1–40: Multiplex one of 40 2-pole or one of 20
INPUTS
MAXIMUM SIgNAL LEVEL:
CONTACT LIFE (typ): >10
CONTACT RESISTANCE: <1W at end of contact life.
CONTACT POTENTIAL:
OFFSET CURRENT: <100pA.
CONNECTOR TYPE: Screw terminal, #20 AWG wire size.
ISOLATION BETwEEN ANY TwO TERMINALS: >10
ISOLATION BETwEEN ANY TERMINAL AND EARTH: >10
CROSS TALk (10MHz, 50W Load): <–40dB.
INSERTION LOSS (50W Source, 50W Load): <0.1dB below
COMMON MODE VOLTAgE: 300V between any terminal and
TEMPERATURE ACCURACY USINg INTERNAL CJC:
gENEraL
40 CHANNELS: 40 channels of 2-pole relay input. All channels
RELAY TYPE: Latching electromechanical.
ACTUATION TIME: <3ms.
FIRMwARE: Specified for Model 2700 rev. B02, 2701 rev. A01,
ENVIrONMENTaL
OPERATINg ENVIRONMENT: Specified for 0°C to 50°C.
STORAgE ENVIRONMENT: –25°C to 65°C.
wEIgHT: 0.52kg (1.16 lb).
7708-3Y-EW
7401
4-pole signals into DMM.
Channels (1–40): 300V DC or rms, 1A switched, 60W, 125VA
1
<±500nV typical per contact, 1µV max.
<±500nV typical per contact pair, 1µV max.
<100pF.
<200pF.
1MHz. <3dB below 2MHz.
chassis.
1.0°C (see mainframe specification for details).
configurable to 4-pole.
and 2750 rev. A01 or higher.
Open thermocouple detector on during thermocouple measurements.
Minimum signal level 10mV, 10µA.
O F
maximum.
aCCESSOrIES aVaILaBLE
C O N F I D E N C E
SErVICES aVaILaBLE
Type K Thermocouple Wire, 30.5m (100 ft).
1-year factory warranty extended to 3 years
from date of shipment
>10
5
8
operations at max. signal level.
operations no load
Specified to 80% R.H. at 35°C.
1
.
10
W,
9
W,