Hirschmann RS20 User Manual page 265

Pin assignment of the device connector
Pin Function
Fig. 2: Connection of the 24V supply voltage and signal contact
PoE supply voltage (optionally)
U
The PoE supply voltage for OCTOPUS ...PoE... devices is connected via a
5-pin M12 connector (A coding, e.g. ELWIKA 5012 PG7 from Hirschmann,
included in the scope of delivery).
The OCTOPUS ...PoE... devices (48 V DC safety low voltage) are supplied
with PoE power by an external power supply unit. The PoE voltage is fed into
the 5-pin M12 connector of the OCTOPUS ...PoE... . The twisted-pair cables
at ports 1 to 8 (or 1 to 6 on OCTOPUS 8M-6PoE) are supplied with PoE volta-
ge via the pins 1&4 on the data signal line pairs (phantom supply).
V Make sure that the external power supply unit you use to provide the PoE
voltage fulfils the following basic prerequisites:
D
Insulation requirements according to IEEE 802.3af (insulation
resistance 48 V, output to "rest of the world" 2,250 V DC for 1 min.).
D
Output power < 150 W.
D
Current limitation < 5 A.
D
Power supply unit and PoE media module form a "limited power
source" according to IEC60950-1.
D
The external PoE power supply unit must be able to provide the power
for the connected PDs.
D
10 ms failure bridging (incl. powered devices) in line with EN 61131-2
D
CE marking in line with 2004/108/EG
D
Certification for railway applications - electronic equipment used on
rolling stock, in line with EN 50155
V Connect the PoE voltage to the 5-pin M12 connector included in the
scope of delivery as shown in the following diagram.
Make sure that the following requirements are met:
D
Supply line length < 3 m.
D
Supply line cross section is suitable for 3.3 A.
OCTOPUS 8M/16M/24M
Release 07/2008
13