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EX1200-3001DS Plug-in Module
39
EX1200-3001DS
P
LUG
-
IN
M
ODULE
1
X
64
2-
WIRE
M
ULTIPLEXER WITH
D
ISCHARGE
C
IRCUIT
The EX1200-3001DS high-density multiplexer module is designed for scanning of multiple points
to a common bus, in either 1-, 2-, or 4-wire configurations, either synchronously with the EX1200
system DMM scan function, or asynchronously as a system switch to other devices through
LXI LAN messages or the hardware trigger bus. Up to 384 two-wire (or 192 four-wire) channels
can be accommodated in a 1U EX1200 mainframe for maximum density, or mixed and matched
with other EX1200 plug-ins for flexibility. Applications include cable harness testing,
semiconductor and PCB testing, and applications where multiple points need to be switched to a
common resource. All relays also have individual relay control, and each path allows for 2 A
switching.
Along with all having all the features of the EX1200-3001, the EX1200-3001DS has internal
residual voltage discharge relays which can be enabled to momentarily short out the measurement
path when changing from one input channel to the next. This dissipates any voltage held by the
wiring and instrument input capacitance. These relays protect sensitive devices, such as CMOS
circuits, from residual voltages caused by previous high-voltage measurements. This feature can
also be disabled in low-voltage applications where maximum throughput speed is important.
The EX1200-3001DS can be controlled programmatically using IviSwtch-compliant calls. Both
path level programming and individual relay control are available. Refer to the host driver
documentation for additional details.
340H
Figure 4-13 provides a logical diagram of the switch module
and identifies the switches used by the module. This information can be used for individual relay
control through the driver. An optional terminal block provides screw termination points for
external field wiring. This terminal block also includes cold junction compensation reference for
more precise temperature measurements.
C
ONNECTOR
P
INS AND
S
IGNALS
F
IGURE
4-12:
EX1200-3001DS
F
RONT
P
ANEL
(F
RONT
V
IEW
)
Summary of Contents for EX1200 Series
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