Axis 243SA 0256-004 Manuale Utente

This section describes the pinout and interface support provided by the 12-pin I/O terminal 

connector, which includes: 

• 4 digital transistor outputs
• 4 digital inputs
• an RS-485 interface
• auxiliary power and GND

The terminal connector is used in applications for motion detection, event triggering, time 

lapse recording, alarm notification via email, and image storage to FTP locations, for 

example.

• Inputs - Example: a push button. If the button is pressed, the state changes, and 

the input will be active (shown under Event Configuration > Port Status). 

• Outputs - Example: an alarm device that can be activated from Output buttons on 

the Live View page or as an action to an Event Type. The output will show as 

active (in Event Configuration > Port Status), if the device is activated.

The Axis video server includes one (green) 12-pin connector block. Connect input/output 

devices to this block:

1. Loosen the corresponding screw on top of the pin on the connector block (see the 

table above to determine which pin to use).

2. Push the cable into the connector block and secure it by fastening the screw.
3. Once all devices are connected, connect the connector block to the video server’s 

terminal connector.

1

Auxiliary DC Power Input

7-20 VDC/min 8W. Electrically connected in parallel with the power 
connector, this provides an auxiliary connection for mains power to 
the unit. If the product is powered via this pin, use a fuse (rating: 1A 
Slow).  
This pin can also be used to power auxiliary equipment, 9vDC max 
100mA. 

2

GND

Ground

3

Digital Input 1

Connect to GND to activate or leave floating (or unconnected) to 
deactivate.

4

Digital Input 2

5

Digital Input 3

6

Digital Input 4 

7

Transistor Output

With a maximum load of 100mA and maximum voltage of 24V DC, this 
output has an open-collector NPN transistor with the emitter 
connected to pin 2 (GND). If it is to be used with an external relay, a 
diode must be connected in parallel with the load for protection 
against any voltage transients.

8

Transistor Output

9

Transistor Output

10

Transistor Output

11

RS-485 - A (non-inverting)

A half-duplex RS-485 interface for controlling auxiliary equipment, 
 PTZ devices, for example.

12

RS-485 - B (inverting)