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Analog Relay Mux Board
ANALOG RELAY
MULTIPLEXER
TERMINAL BOARD.
___________ _
Introduction.
This manual explains the functions and features of the
Analog Relay Multiplexer Terminal Board for the AD1200 series
of cards. The Relay multiplexer card expands the input capability
of the AD1200 card from only 8 differential channels up to a
maximum of 1,920 Differential input channels. Each of these
channels is completely isolated from each other.
The original ADMUX Rev2 boards only provided the relays and
multiplexing functions.
The updated ADMUX Rev3 boards have two extra features:-
i)
On board jumper selectable gain amp and isolation
amplifiers providing amplification of low level signals and
complete galvanic isolation between the selected input and
the AD1200 card in the PC. The input to the gain amp and
the isolating amp are both via any selected on board relay
and via the "CHAIN OUT" terminals.
ii)
The selected input, switched through the relays, is output
via the last two pins of screw terminal connector next to
the IDC ribbon cables, the "CHAIN OUT" terminals.
External wires can connected these lines together so that
multiple relay boards may utilise the gain and iso amps on
one master ADMUX Rev3 card.
Thus the output from the relays boards are commoned up,
amplified and isolated before being input back to the
AD1200 card.
Note To upgrade the original cards to work with the newer
cards:- Remove the two jumpers from AD1200 channel select
header strip.
Connect two wires from this jumper strip to the unused pins on
the terminal block.
Reference
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