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Chapter 7 Plug-in Modules
44470A 10-Channel MUX Module
7
44470A 10-Channel MUX Module
The Agilent 44470A Relay Multiplexer (MUX) provides 10 2-wire
channels (latching relays) to switch both Hi (H) and Lo (L) input signal
lines to a common bus. Relays on this module are rated at a maximum
voltage of 250 volts with a maximum current of 2 amps dc or ac rms.
The module exhibits low thermal offset characteristics, making it ideal
for precision low-level measurements. However, since no thermocouple
compensation is included, temperature measurement errors may occur if
you use this module to switch thermocouples.
The 44470A can be operated in either of two modes, single channel
break-before-make (BBM), or multiple channels closed at the same time.
Specifications for the 44470A are given on page 329.
44470A Simplified Schematic
A simplified schematic of the 44470A is shown below. The 44470A
consists of 10 2-wire relay channels that may be connected to a common
bus. Channels on the 44470A are numbered as 00 through 09 (CH00
through CH09).
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