OPTEX WXI detectors 862-01-WXI-R-LC OPTEX WXS 180° wireless ready - low current detectors 862-01-WXI-R OPTEX WXS 180° wireless detectors 862-01-WXI-ST OPTEX WXS 180° wired detectors 862-01-WXI-AM OPTEX WXS 180° wired detectors