19②Power supply terminal (24 V AC) / 24 V AC power supply connector kit (accessory)In the case of the use of a 24 V AC power supply, connect the output of the 24 V AC power sup-ply to the 24 V AC power supply connector (accessory) with the contact (accessory). Then, con-nect the 24 V AC power supply connector to the power supply terminal (24 V AC).③Audio input cable (white)Caution:• A READILY ACCESSIBLE DISCONNECT DEVICE SHALL BE INCORPORATED TO THEEQUIPMENT POWERED BY 24 V AC POWER SUPPLY.• ONLY CONNECT 24 V AC CLASS 2 POWER SUPPLY (UL 1310/CSA 223) or LIMITEDPOWER SOURCE (IEC/EN/UL/CSA 60950-1).• ONLY CONNECT POWER OVER ETHERNET 54 V DC or PoE+ 54 V DC LIMITED POWERSOURCE (IEC/EN/UL/CSA 60950-1).IMPORTANT:• Be sure to use the 24 V AC power supply connector kit (accessory) provided with this product.• Be sure to fully insert the 24 V AC power supply connector (accessory) into the power supplyterminal (24 V AC). Otherwise, it may damage the camera or cause malfunction.• When installing the camera, make sure that excessive force is not applied to the powersupply terminal (24 V AC).• Be sure to use an insulated 24 V AC power supply from a commercial power supplycompliant with the Specifications (Indicated inside the SD slot cover at the rear part of thecamera.) regarding power source and power consumption.Connect a microphone or the line out of an external device using a stereo mini plug (ø3.5 mm).(Monaural input)• Recommended microphone : Plug-in power type (locally procured)(Sensitivity of microphone : –48 dB ±3 dB (0 dB=1 V/Pa,1 kHz))• Input impedance : Approx. 2 kΩ (unbalanced)• Supply voltage : 4.0 V ±0.5 V• Recommended cable length : Less than 1 m {3.28 feet}• Input level for the line input : Approx. –10 dBV• Recommended cable length : Less than 10 m {32.8 feet}Connect an external speaker* using a stereo mini plug (ø3.5 mm). (Monaural output)• Output impedance : Approx. 600 Ω (unbalanced)• Recommended cable length : Less than 10 m {32.8 feet}• Output level : –20 dBV * Use a powered speaker.④Audio output cable (black)IMPORTANT:• Connect/disconnect the audio input/output cables and turn on the power of the camera afterturning off the power of the audio output devices. Otherwise, loud noise may be heard fromthe speaker.• Make sure that the stereo mini plug is connected to this cable. When a monaural mini plug isconnected, audio (Image: when audio output is switched to monitor output) may not be heard.When connecting a monaural speaker with amplifier, use a locally procured conversion cable(mono-stereo).