Operator`s manual

1.0 Introduction
Congratulations! You have purchased a Personal Computer (PC) Plug-in instrument with analog and systems
performance that rivals the best, all-in-one box, instruments. The SM4040 series relay scanner/multiplexer are easy
to setup and use, have sophisticated analog and digital circuitry to provide very repeatable switching. Please take a
few moments and review this manual before installing and using this instrument.
This manual describes the SM4020, SM4022, SM4040, and SM4042 Scanners. Each delivers unmatched switching
performance in a PCI plug-in instrument. With a rich repertoire of functions, the SM4040 series out performs all
other plug-in Scanners, including most brand-name bench top units.
Note: In this manual, all references to the "SM4000" and “Scanner” applies to the SM4020, SM4022, SM4040, and
SM4042. Features unique to each product will be identified as such.
1.1 Safety Considerations
Safety Considerations
The SM4000 series of Scanners are capable of switching 110 VDC or 220, depending on model number,
across the High and Low terminals. They can also handle common mode signals that "float" the Scanner
above EARTH ground by up to 110 VDC or 220 VAC, depending on the model. When making common
mode switching, the majority of the circuits inside the Scanner are at the common mode voltage. These
voltages can be lethal and may KILL! During and after installing your Scanner, check to see that
there are no wires or ribbon cables from your PC trapped inside the Scanner.
The Scanner comes installed with four shields (bottom, top, and two edge strips) that must not be
removed for performance as well as safety reasons. Removal of these shields and/or improper
assembly of the shields can result in lethal voltages occurring within your PC. Be sure to check your
installation before closing the cover on your personal computer.
Warning
Check to see that no loose wires or ribbon cables infringe upon any of the internal circuits of the
Scanner, as this may apply lethal voltages to your computer, causing electrocution and/or damage to
your computer!
To avoid shock hazard, install the Scanner only into a computer that has its power connector
connected to a power receptacle with an earth safety ground.
When connecting to signals above 50 VDC or 40 VAC, only use Safety Test Leads and harnesses.
1.2 Minimum Requirements
The SM4040 series of system relays Scanners are plug-in modules that are compatible with IBM type personal
computers (PCs), from the 486 class to the Pentiums. They require a half-length expansion slot on the PCI bus. A
mouse must be installed when controlling the Scanner from the Windows Control Panel. The SM4040 comes with a
Windows' DLL, for operation with Windows' Version 95/98 and NT4.0, Windows 2000 or greater.
5 Signametrics