Page 12 AXIS 211M Installation GuideUnit connectorsNetwork connector - RJ-45 Ethernet connector. Supports Power over Ethernet. Usingshielded cables is recommended.Power connector - Mini DC connector. 7-20V DC, max 5W. See product label for ±connection.Audio in - 3.5mm input for a mono microphone, or a line-in mono signal (left channel isused from a stereo signal).Audio out - Audio output (line level) that can be connected to a public address (PA) systemor an active speaker with a built-in amplifier. A pair of headphones can also be attached. Astereo connector must be used for the audio out.I/O terminal connector - Used in applications for e.g.motion detection, event triggering, time lapserecording and alarm notifications. It provides theinterface to:• 1 transistor output - For connecting exter-nal devices such as relays and LEDs. Con-nected devices can be activated by AXISVAPIX AP, output buttons on the LiveView page or by an Event Type. The out-put will show as active (shown underEvent Configuration > Port Status) if thealarm device is activated.• 1 digital input - An alarm input for connecting devices that can toggle betweenan open and closed circuit, for example: PIRs, door/window contacts, glass breakdetectors, etc. When a signal is received the state changes and the input becomesactive (shown under Event Configuration > Port Status).• Auxiliary power and GNDFunction Pin number Notes SpecificationsGND 15V DC Power 2 Can be used as an alternative power supply(7-20VDC) or to power auxiliary equipment+5VDC (100mA).Max load = 100mADigital Input 3 Connect to GND to activate, or leave float-ing (or unconnected) to deactivate.Must not be exposed tovoltages greater than20VDCTransistorOutput4 Uses an open-collector NPN transistor withthe emitter connected to the GND pin. Ifused with an external relay, a diode must beconnected in parallel with the load, for pro-tection against voltage transients.Max load =100mAMax voltage = 24VDC(to the transistor)Pin 3Pin 4 Pin 2Pin 1Terminal connector. Note that the pinsare numbered 1-4, right to left.