- Axis User's Manual Network Camera 2120
 AXIS 2120 User’s Manual Physical Description
 9 
The Rear Panel
Note: The power supply for your AXIS 2120 is country specific. Please check that you are using the cor-
rect type. See page 10.
Power Supply
Connector
A single Jack socket 
(PS-D) for connection 
of the AXIS 2120 
power supply. The ter-
minal block connector 
provides an auxiliary 
connection point for 
AC or DC power to the 
unit.
Power Indicator
Normally lit when 
power is applied. If it is 
not lit, or it flashes, 
there is a problem with 
the AXIS 2120 external 
power supply.
Network Indicator
After completion of the startup and self test routines, this 
multi-colored indicator flashes independently, as follows:
• yellow - activity on a 10Mbps network
• green - activity on a 100Mbps network 
• red - no physical connection to the network
Network Connector
The AXIS 2120 is designed for 
10 Mbps Ethernet and 100 
Mbps Fast Ethernet networks 
and connects to the network 
via a twisted pair category 5 
cable (10baseT and 
100baseTX), terminated using 
a standard RJ-45 connector. 
Supporting NWAY, the AXIS 
2120 detects the speed of the 
local network segment and 
varies the speed of data com-
munication accordingly 
(between 10 Mbps and 100 
Mbps)..
 I/O Connector
Provides the physical interface to a digital output, and a single digital photo-cou-
pled input that is used for connecting a variety of external alarm devices to the AXIS 
2120 including, IR-sensors, switches and alarm relays. In combination with the con-
figurable alarm facilities, you can quickly develop a variety of security applications 
that are triggered on time - or alarm based - events. The connector can also be uti-
lized as an alternative connection point for DC power to the unit. For pinout infor-
mation, refer to Appendix D - The Unit Connectors.
RS-232 Serial 
Connector
The serial connector provides 
the RS-232 interface for con-
necting a modem, or the con-
nection for the AXIS 2191 
Audio Module. For pinout 
information, see Appendix D - 
The Unit Connectors.
DC-Iris Connector
With the DC-Iris cable con-
nected to the lens upon 
delivery, this socket pro-
vides the power and elec-
tronic signalling to the lens 
of the AXIS 2120.
For instructions on how to 
change the DC Iris settings, 
refer to Adjusting the 
DC-Iris Settings, on page 










