Omron Electronics LLC Rectangular Connectors, XN2 Series Expansion Omron Electronics XN2 Series Rectangular Connectors are easy-wire connectors with E-con specifications, ideal for industrial components and connecting sensors. The XN2 series uses industry-proven spring clamps for wiring and accepts any wire size from AWG28 (0.08mm2) to AWG20 (0.5mm2). Omron Electronics designed the XN2 series for easy wiring, rewiring, and repair - no special tools required.