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2.1.8
Connecting the MM22-T1T1T1T1 PoE media module
The MM22-T1T1T1T1 PoE media module with PoE voltage (48 V DC safety
extra-low voltage) is supplied with power via an external power supply unit.
The PoE voltage is fed into the 3-pin terminal block of the PoE media module.
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.
MS20/MS30 MS20/MS30
Release 10 07/2012
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