E1476A Datasheet, PDF (2/4 Pages) Agilent(Hewlett-Packard) – 64-Channel 3-Wire T/C Relay Multiplexer

Configuration
Each of the 64 channels provides
separate high, low, and guard
connections, all easily accessible
via the quick connect screwless
terminals on the companion
terminal block. The multiplexer
is organized in two banks of
32 with each bank having its own
voltage sense control switch and
one bank having a current source
control switch. This dual bank
configuration makes it possible
to use half the channels as sense
channels, while the other half are
used as current source channels,
thus obtaining 32 four-wire mea-
surement channels, each with
high, low, and guard connections.
Product Specifications
Input
DC:
Maximum voltage
120 Vdc
(any terminal to any other terminal or chassis):
AC rms: Maximum voltage
120 V rms
(any terminal to any other terminal or chassis):
Maximum current
(per channel common, non-inductive):
35 mA
Maximum power per channel:
4 VA
DC
Maximum thermal
offset per channel, differential Hi-Lo:
<4 µV, <2 µV
(10 samples averaged)
Closed channel resistance:
100 Ω ±5 Ω
Insulation resistance (between any two points): 10E⁹ Ω, 40ºC, 95% RH
Insulation resistance (Hi to Lo, power off): n/a
One 6 cm (2.5-in) analog bus
cable (E1400-61605) is shipped
with each module to allow you to
interconnect the E1411B 5.5-digit
multimeter to one or more E1476A
multiplexers via its front panel
analog bus connector. For con-
nection to an external voltmeter
or other VXI multimeter with
conventional front panel con-
nectors, access to the analog bus
lines is available in the terminal
block. This allows you to connect
the analog bus signal lines to the
multimeter inputs using ordinary
hookup wire.
AC
Maximum bandwidth
(-3 dB, 50 Ω source/load):
Crosstalk (channel-to-channel):
100 kHz:
10 MHz:
Both:
Closed channel capacitance:
General Characteristics
Relays:
Power down state:
Power up state:
Minimum relay life:
No load:
Rated load:
Reference junction measurement
accuracy (18 to 28 ºC operating):
Strain gage excitation:
Screw terminal wire size:
Scanning rate:
100 kHz
-70 dB
-45 dB
n/a
<175 pf H-L, <300 pf L-G,
<1500 pf G-C
Reed relays
Break-before-make
Relays open on power down
Relays open on power up
5 x 10E⁹ operations
10E⁷ operations
0.38 °C
n/a
22 to 26 AWG (0.5, 0.75, 0.9 mm)
333 channels/s typ.
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