50
Installation MS20/MS30
Release 13 09/2019
The twisted-pair cables at ports 1 to 4 are supplied with PoE voltage via the
spare pairs (pins 4 & 5 and 7 & 8 of the RJ45 sockets).
Note:
Only use the Hirschmann RPS60/48V EEC power supply unit to
supply the PoE voltage.
Make sure that the external power supply unit you use to provide the PoE
voltage fulfills the following basic prerequisites:
Insulation requirements according to IEEE 802.3af (insulation
resistance 48 V output to “rest of the world” 2250 V DC for 1 min.).
Output power < 100 W.
Current limitation < 2 A.
The power supply unit and the PoE media module form a limited power
source according to IEC60950-1.
The external PoE power supply unit must be able to provide the power
for the connected PDs.
Power supply unit RPS60/48V EEC fulfills these requirements.
Note:
The RPS60/48V EEC power supply unit does not fulfill the
requirements according to Germanischer Lloyd, criterion EMC1, relating to
conducted emissions on the 230 V AC side. If this requirement must be
fulfilled, connect a corresponding power supply unit that fulfills both this
requirement
and
the basic requirements.
Connect the PoE voltage to the 3-pin terminal block included in the scope
of delivery, as shown in the following diagram.
Make sure the following requirements are met:
Supply line length < 3 m.
Supply line cross section is suitable for 1.5 A.
Mount the terminal block for the PoE supply voltage on the bottom of the
PoE module using the snap lock. Make sure it latches securely in place.
Note:
Use 4-pair twisted pair cables to connect the terminal devices. Only
connect terminal devices that conform to IEEE 802.3af.
Figure
Pin
Assignment
1
+ 48 V
2
—
3
0 V
Table 9:
Pin assignment of the 3-pin terminal block
1
2
3
Summary of Contents for Hirschmann MICE MS20
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