Chapter 2 Configuration and InstallationSCXI-1102/B/C User Manual2-4 ©National Instruments CorporationIf you want to change the W1 jumper setting, refer to Figure 2-2 as youperform the following steps:1. Ground yourself via a grounding strap or via a ground connected toyour SCXI chassis. Properly grounding yourself prevents damageto your SCXI module from electrostatic discharge.2. Remove the grounding screw of the top cover.3. Snap out the top cover of the shield by placing a screwdriver in thegroove at the bottom of the module and pushing down on thescrewdriver.4. Change the W1 jumper setting.5. Reinstall the top cover and grounding screw.Figure 2-2. Removing the SCXI Module CoverAnalog ConfigurationCurrent-Loop ReceiversThe SCXI-1102/B/C modules have pads for transforming individualchannels to current-to-voltage converters. National Instruments offersan SCXI process-current pack of four 249 Ω, 0.1%, 5 ppm, 1/4 Wresistors. The reference designators for the current loop resistors haveGroundingScrewTop of ModuleFront ConnectorRemovable Cover