.... * 1 2 4 5 3 No polarity 100 to 240 VAC 24 to 240 VDC Tb Tc Contact output Ta (Built-in Relay: G6C) Photoelectric Sensor main circuit Power Source Indicator (red) L-ON (Ta) D-ON (Ta) Inciden...https://www.ia.omron.com/data_pdf/cat/e3jm_ds_e_12_9_csm421.pdf