20
Installation OCTOPUS OS20/OS24 Unmanaged
Release
07
07/2014
The patch cables for operating the device are shown in table 9.
1.5.2 10/100 Mbit/s twisted pair connection for PoE
(4-pin M12 sockets)
Some device variants support Power over Ethernet based on IEEE 802.3at
(PoE+) via a twisted pair:
The PoE ports allow the connection and remote supply of, for example, IP
telephones (Voice over IP), webcams, sensors, printer servers and WLAN
access points. With PoE, power is supplied to these terminal devices via the
twisted-pair cable.
The devices are supplied with PoE voltage (53 V DC safety low voltage) via
the internal voltage supply. The PoE voltage to the twisted-pair cables is
supplied via the wire pairs transmitting the signal (phantom voltage).
The total PoE power output is limited to 61.6 W.
Patch cables Wire pairs
M12 4-pin on M12 4-pin, crossed
(MDI to MDI)
1 (TX+) – 2 (RX+)
2 (RX+) – 1 (TX+)
3 (TX−) – 4 (RX−)
4 (RX−) – 3 (TX−)
M12 4-pin on M12 4-pin, 1:1
(MDI to MDI-X via auto-crossing port)
1 (TX+) – 1 (RX+)
2 (RX+) – 2 (TX+)
3 (TX−) – 3 (RX−)
4 (RX−) – 4 (TX−)
M12 4-pin on RJ45, crossed
(MDI to MDI (terminal device))
1 (TX+) – 3 (RX+)
2 (RX+) – 1 (TX+)
3 (TX−) – 6 (RX−)
4 (RX−) – 2 (TX−)
M12 4-pin on RJ45, 1:1
(MDI to MDI-X (Switch))
1 (TX+) – 1 (RX+)
2 (RX+) – 3 (TX+)
3 (TX−) – 2 (RX−)
4 (RX−) – 6 (TX−)
Table 9: Patch cables for operating the device
Device Number of TX ports PoE-capable TX ports
included
OS20-... 10 None
OS24-... 10 8
(Port 2 ... 5, 7 ... 10)
Table 10: Device types: Twisted-pair ports and PoE support
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