Quick Installation Manual REV:202204
2G-2S.0.3.F-BOX-PoE
Industrial PoE+ Managed Switches
www.metel.eu 22/23
www.iplog.eu
Isolated Connection
The switch is grounded via an internal lightning arrester, which ensures galvanic separation from PE and
elimination of ground loops. PoE PD devices are also separated from PE in accordance with PoE standards.
•
The 30mA protector (RCD) protects especially when touching a live part with 230V (AC currents).
•
When the live part comes into contact with 48VDC, the current goes through the body into the PE and is
negligible.
Power Supply
The transmission of PoE power supply via data cables falls within the scope of standards ČSN
EN 62368-1 and 3. These define, among other things, the basic requirements for minimizing
the risk of injury, fire or property damage and divide electricity sources into categories ES1
to ES3. PoE PSE circuits in switches fall into the safest category ES1 with a maximum
delivered power <100 VA per 1 port. This and the following pages describe the security
features of switches and installation rules to minimize these risks.
Power Supply
p
ri
m
se
c
Internal
el.
Circuits
+
48V
-
Camera
(PoE-PD)
FE
GE
Server
PoE->
RS485
USB
LEGEND:
Galvanic separation
Metal cover / shield
Fine Protection
Lightning Arrester (s)
RE DI
/
AI
RCD
30mA
L N PE
GND
With an isolated connection,
the PC can be connected
directly, without additional
separation.
Connection with Grounded (+) or (-) Power Pole
In PoE systems with a directly grounded (+) or (-) pole, it is necessary to place increased emphasis on el.
safety. Especially in cases where PoE cables interfere with outdoor or humid environments, contact of
live parts with a potential against the ground can cause dangerous residual current to flow through the
human body into the PE. A suitable protection in such a case is a 10mA type A circuit breaker capable of
switching off even escaping direct current.
•
The 30mA protector (RCD) protects especially when touching a live part with 230V (AC currents).
•
When touching a live part with 48VDC, the leakage current is interrupted by a 10mA circuit breaker.
Switch (PoE-PSE)
p
ri
m
se
c
Internal
el.
Circuits
+
48V
-
Camera
(PoE-PD)
FE
GE
PoE->
RS485
USB
LEGEND:
Galvanic separation
Metal cover / shield
Fine Protection
Lightning Arrester (s)
RE DI
/
AI
RCD 30mA
L N PE
GND
Shielded USB-B manufactured until 2021/05
When the (+) or (-) power supply pole is
grounded, there is a voltage of 48V between
GND and the shield of the USB connector. In
the PC, GND and shielding are connected.
Therefore, connect the PC exclusively via the
GDS-USB-AB galvanic separator.
Unshielded USB-B manufactured from 2021/05
The PC can be connected directly, without the
use of a separator.
RCD 10mA
When you touch a live
part, current begins to
flow into the ground.
Switch (PoE-PSE)
