7706
•
20 channels of analog input
(w/automatic CJC) for general-
purpose measurements
•
16 channels of digital output
•
2 analog outputs (±12V, 5ma)
•
300V, 1a capacity; 60W, 125Va
maximum
•
Configurable as two
independent banks of
multiplexers
•
relay closures stored in
onboard memory
All-in-One I/O Module
20-channel Differential Multiplexer w/Automatic CJC, 16 Digital
Outputs, 2 Analog Outputs, a Counter/Totalizer, and Screw Terminals
CaPabIlITIEs
CHANNELS 1–20:
Multiplex one of 20 2-pole or one of 10
4-pole signals into DMM .
Channels 21–25 are referenced to chassis ground .
CHANNELS 21–22:
16 Digital Outputs .
CHANNELS 23–24:
Analog Voltage Output (2) .
CHANNELS 25:
Totalize Input .
INPuTs
MAXIMUM SIGNAL LEVEL (Channels 1–20):
300V DC or rms,
1A switched, 60W, 125VA maximum .
CONTACT LIFE (typ.):
>10
5
operations at max . signal level;
>10
8
operations no load
1
.
1
Use with Integra Series mainframes: 2700, 2701, 2750
Minimum signal level 10mV, 10µA .
ordering Information
7706
all-in-one I/o Module
sErVICEs aVaIlablE
7706-3Y-EW
1-year factory warranty extended to 3 years
from date of shipment
The Model 7706 plug-in module offers 20 chan-
nels of 2-pole or 10 channels of 4-pole multiplex-
er switching with automatic CJC, as well as two
analog output channels, 16 digital outputs, and
one event counter/totalizer . The event counter/
totalizer can be used to monitor and control
system components, such as fixtures, limit
switches, pass/fail indicators, external voltage
sources, loads, door closures, revolutions, etc .,
while performing mixed signal measurements .
The Model 7706 is ideal for RTD, thermistor, and
thermocouple temperature applications .
CONTACT RESISTANCE:
<1W at end of contact life .
CONTACT POTENTIAL:
<±2µV typical per contact, 3µV max .
OFFSET CURRENT:
<100pA .
CONNECTOR TyPE:
Screw terminal, #20 AWG wire size .
ISOLATION BETWEEN ANy TWO TERMINALS:
>10
9
W,
<100pF .
ISOLATION BETWEEN ANy TERMINAL AND EARTH:
>10
9
W,
<200pF .
CROSS TALK (10MHz, 50W Load):
<–35dB .
INSERTION LOSS (50W Source, 50W Load):
<0 .1dB below
1MHz . <3dB below 2MHz .
COMMON MODE VOLTAGE:
300V between any terminal and
chassis .
TEMPERATURE ACCURACy USING INTERNAL CjC:
1 .0°C (see mainframe specification for details) .
DIGITal ouTPuT
V
OUT
(L):
<0 .8V @ I
out
= 400mA .
V
OUT
(H):
>2 .4V @ I
out
= 1mA .
V
OUT
(H)MAX.:
<42V with external open
drain pull-up .
WRITE SPEED:
50/s .
GENEral
20 CHANNELS:
20 channels of 2-pole
relay input . All channels configurable
to 4-pole .
RELAy TyPE:
Latching electromechanical .
ACTUATION TIME:
<3ms .
FIRMWARE:
Specified for Model 2700
rev . A02 or B01, 2701 rev . A01, and 2750
rev . A01 or higher .
Input
HI
LO
NOTES: Channels 26—28 in this schematic
refer to the designations used for
control and not actual available channels.
Channels 26, 27, and 28 can be individually
controlled using ROUTe:MULTiple if the
module is not to be connected to the
internal DMM.
For more information, refer to the
ROUTe:MULTiple command section
in the Model 2700, 2701, or 2750 User s Manual.
Channel 28
(see Note)
Backplane
isolation
HI
Input
LO
Channel 26
2-Pole (Open)
4-Pole (Closed)
(see Note)
Sense HI
LO
Cold junction
Ref x2
Channel 1
HI
LO
(Channels 2—9)
HI
LO
Channel 10
ToTalIZE INPuT
MAXIMUM COUNT:
2
32
–1 .
TOTALIzE INPUT:
100kHz (max), rising
or falling edge, programmable .
SIGNAL LEVEL:
1Vp-p (min), 42Vpk
(max) .
THRESHOLD:
0V or TTL, jumper select-
able .
GATE INPUT:
TTL-Hi, TTL-Lo, or none .
COUNT RESET:
Manual or Read+Reset .
READ SPEED:
50/s .
aNaloG VolTaGE ouTPuT
DAC 1, 2:
±12V in 1mV increments, non-
isolated .
RESOLUTION:
1mV .
I
OUT
:
5mA max .
SETTLING TIME:
1ms to 0 .01% of output .
ACCURACy ±(% of output + mV):
1 year ±5°C:
0 .15% + 19mV;
90 day ±5°C: 0 .1% + 19mV;
24 hour ±1°C: 0 .04% + 19mV .
TEMPERATURE COEFFICIENT:
±(0 .015% + 1mV)/°C .
Cold junction
Ref x2
Channel 11
Channel 27
(see Note)
Backplane
isolation
HI
Sense
LO
To Model 2700,
2701, or 2750
Backplane
HI
LO
(Channels 12—19)
HI
Channel 20
LO
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
16
Channel 23
DAC
Channel 23
16
Channel 21
NOTE: Non-isolated
grounds ( )
are referenced to
chassis ground.
Channel 22
Channel 24
DAC
16
Channel 24
Digital
Output
32
Totalizer
+IN
—IN
+GATE
—GATE
Channel 25
1.888.KEITHLEY
(U.S. only)
www.keithley.com
A Greater Measure of Confidence
DIGITAL MULTIMETERS & SYSTEMS
ENVIroNMENTal
OPERATING ENVIRONMENT:
Specified for 0° to 50°C . Specified to
80% R .H . at 35°C .
STORAGE ENVIRONMENT:
–25° to 65°C .
WEIGHT:
0 .5kg (1 .1 lbs) .
Use with Integra Series mainframes: 2700, 2701, 2750
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