
Page 1.2 pickeringtest.com
Section 1 - Technical Specification
LED Energised Path Indicators
Space permitting, each microwave relay fitted to a 4x-890
module has associated frontpanel LED indicators to show the
current energised path through the relay, as illustrated in the
figure above. This signal path indication greatly simplifies the
debug of test application software.
Manual Control
The 4x-890 is supplied with soft front panels for each of the
fitted relays, as shown here. These enable graphical manual
control of the switches to simplify application software
development and debug.
Easy Repair
To facilitate fast in-field repair, wherever possible we fit relay
types that may be quickly replaced by simply withdrawing
them through the front panel.
Configuration Restrictions
Whilst offering a high degree of flexibility in relay population
there are some restrictions applicable to the flexible
configurations.
Mechanical - the maximum number of chassis slots occupied by
a single module is six. The relay physical sizes varies between
switch types, for details refer to the user manual. Alternately, to
assist with visualising the panel layout Pickering’s Microwave
Switch Design Tool (MSDT) online application can be used to
define the relay quantities, types and positions.
Electrical - the driver card has twenty-four control lines,
grouped both in banks of six or individually with each relay
coil typically requiring a single control line. Each SPDT or
transfer switches is controlled by an individual drive line.
For multiplexers, a single six channel bank is required for
SP4T and SP6T multiplexers with higher channel count
multiplexers controlled via multiple banks.
Due to the flexible nature of the product range it is
recommended that your local sales office is contacted to
review your requirements as this will allow for the most
efficient relay loading to be determined.
Relay Cycle Counting
To aid with module “health” monitoring all versions are
provided with a relay cycle counting cycle feature. The
number of operations per contact are stored on the module
and can be used to determine if a relay is approaching EOL.
This information could allow system connections to be
revised so that signals applied to heavily used contacts are
swapped with lightly used contacts to prolong the working
life of the relay(s).
4x-890
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PRELIMINARY DATA
PXI/PXIe Flexible Microwave Module