14Parts and their functions (continued)Rear panelTALLY/GPIO SIGNAL GNDSERIAL CONTRS-422 LANIP CONT 12 V INONPOWER5 4 3 2 1 Grounding terminal [SIGNAL GND]Connect this to the system ground. TALLY/GPIO connector [TALLY/GPIO]JST: JBY‑25S‑1A3F(LF) (SN)Connect an external device to this connector to receive tallyinformation or send the camera selection status.Use a shielded cable to connect to the connector. SERIAL CONT 1 to 5 connectors[SERIAL CONT 1 to 5] (RJ‑45)Connect remote cameras that support a serial connection to theseconnectors with LAN cables.Connect them with straight cables (category 5e or better shieldedcable).For details, refer to “Connections” (pages 15 to 17).zz Do not connect cables for PoE power supply to theseconnectors.Note IP CONT connector [IP CONT] (RJ‑45)(10BASE‑T/100BASE‑TX)Connect a remote camera or computer that supports an IPconnection to this connector with a LAN cable.When directly connecting a device to the unit, use a crossover cable(category 5e or better shielded cable).When connecting via a hub (switching hub) etc., use a straight cableor a cross cable (category 5e cable).For details, refer to “Connections” (pages 15 to 17). DC IN socket [12V IN] (DC 12 V) (XLR connector)Connect an external DC power supply to this connector.zz Use a DC cable with a length of max. 2 m (6.6 ft) (when using anAWG16 cable).External DC power supplyConnect after making sure that the output voltage of the externalDC power supply is compatible with the rated voltage of thecamera.Select an output amperage for the external DC power supply witha margin above the total amperage of the connected devices.The total amperage of connected devices can be calculated withthe following formula.Total power consumption ÷ voltageWhen the power of the camera is turned on, inrush current isgenerated. Insufficient power supply when turning on the powermay cause a malfunction. We recommend that you use anexternal DC power supply that can assure double the capacity ofthe total power consumption of the camera and connected devicesthat are turned on by interlock when the power of the camera isturned on (such as lenses, wireless microphone receivers).zz Make sure of the pin alignment of the DC output terminal of theexternal DC power supply and the camera DC IN connector,and connect the polarity correctly.If the +12 V power supply is mistakenly connected to the GNDterminal, it may cause fire or malfunction.12V IN12341 GND2 —3 —4 +12VHA16RA‑4P (77)Hirose Electric Co. POWER switch [POWER]When the POWER switch is set to the ON position, the POWERindicator (1) lights, and the unit can be operated.