1 Inlet tube fitting, ¼-in. or 1/8-in. 7 Connection indicators (Ethernet and Wi-Fi units only)
2 Status LED indicator 8 Ethernet RJ45 connector (Ethernet unit only)
3 Antenna (Wi-Fi unit only) 9 5-pin connector for power (Ethernet and Wi-Fi units only)
4 Service port for setup or external indicator light 10 Tube fitting to vacuum (or quick-connect fitting)
5 Dip switch for serial RS485 units only 11 Tube fitting to vacuum, alternate location
6 RH Temp port for temperature/humidity sensor 12 10-pin connector for power and communication (all units except Ethernet and Wi-Fi)