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SELECTABLE RESISTOR MODULE 40-280/281/282
pickering SECTION 1 - TECHNICAL SPECIFICATION
SECTION 1 - TECHNICAL SPECIFICATION
pickeringtest.com
PXI Selectable Resistor Module 40-280/281/282
ISSUE 9.0 APR 2018
• High Density Selectable Resistor Module
• Up to 48 Separate Channels of Switchable
Resistors
• Customer Defined Resistor Values
• Channels Can be Set as Open or Short Circuit or a
Pre-set Resistor Value (40-280)
• Version Available With Switchable Offset
Resistance (40-281)
• Potential Divider Version Available (40-282)
• Uses High Reliability Pickering Reed Relays For
Maximum Performance
• VISA, IVI & Kernel Drivers Supplied for Windows
• Supported by PXI or LXI Chassis
• 3 Year Warranty
The 40-280 series provides a cost effective, high-density solution
for applications requiring a high channel count of simple resistor
congurations.
The 40-280 provides up to 48 isolated channels, each of which can
be programmed as a short circuit, an open circuit or a xed resistor
value.
The 40-281 provides up to 24 isolated channels, each of which can
be set as an open circuit, an offset resistor value or a xed resistor
value plus the offset.
The 40-282 is a potential divider with up 24 separate channels.
This can be used to emulate potentiometer devices, each channel
having a xed R1 R2 ratio. Additionally, the centre point can be
shorted to either of the potentiometer end points.
Modules are supplied without any resistors tted, permitting the
user to t the values required. The exibility of this allows users
to select components that best meet their application needs.
Alternatively, please contact the Pickering Sales Ofce if the
module is required pre-tted with resistors.
All versions of the 40-280 series use high quality instrument grade
reed relays to ensure long service life. The modules are ideal
for applications involving go/no-go testing where emulation of
adjustable components or remote sensors is required. The modules
provide a lower cost and higher density solution than approaches
using fully programmable resistor chains.
IN
OUT
IN
OUT
Vout
Vref
Vin
RRRoffset
R2
R1
40-280 Single Resistor Card 40-281 Dual Resistor Card 40-282 Potential Divider
Simplified Block Diagrams for one channel of the 40-280/281/282 Selectable Resistor Modules
