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www.keysight.com
DAQM901A
20-Channel General Purpose Multiplexer
– 80 ch/s scanning
– Two- and four-wire scanning
– Built-in thermocouple reference junction
– 300 V switching
The Keysight DAQM901A is the most
versatile multiplexer for general
purpose scanning. It combines dense, multifunction
switching with 80-channel/second scan rates
to address a broad spectrum of data acquisition
applications.
Two- and four-wire channels can be mixed on the
same module. Two additional fused inputs (22 chan-
nels total) route up to 1 A of current to the internal
DMM, allowing ac and dc current measurements
without the need for external shunt resistors.
Backplane switches
Internal
DMM input
01
10
Com
H
L
H
L
H
L
H
L
H
L
H
L
I
L
I
L
I
L
I
L
H
L
H
L
T
Com
(4W sense)
11
20
21
Current
channels
22
Com
(Current)
Fuse
Fuse
Internal
DMM input
(4W sense)
Internal
DMM input
(Current)
Reference
junction
sensor
Channel switches
Bank switch
Shunt switches
DAQM902A
16-Channel High-Speed Multiplexer
– Scanning up to 250 ch/s
– Two- and four-wire scanning
– Built-in thermocouple reference junction
The Keysight DAQM902A employs reed relays to
achieve scan rates up to 250 channels per second.
Use this module for high-throughput automated test
applications as well as high-speed data logging and
monitoring tasks.
Sixteen two-wire inputs switch up to 300 V. Two-
and four-wire channels may be mixed on the same
module. User provided shunt resistors are required
for current measurements.
Backplane switches
Internal
DMM input
01
08
Com
Com
(4W sense)
09
16
Internal
DMM input
(4W sense)
Reference
junction
sensor
Channel switches
Bank switch
H
L
H
L
T
H
L
H
L
H
L
H
L
H
L
H
L
Note: Not recommended for connection to ac line without
external transient suppression.
www.allice.de
Allice Messtechnik GmbH
