Wiring Instructions
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netTAP NT 50 | Gateway Devices
DOC091202UM09EN | Revision 9 | English | 2013-02 | Released | Public
© Hilscher, 2010-2013
10.2 Ethernet
Use of Hubs and Switches
For the corresponding communication systems, the use of hubs and/or
switches is either forbidden or allowed. The following table shows the ac-
ceptable use of hubs and switches by each communication system:
Communication System
Hub
Switch
EtherCAT
forbidden
only allowed between EtherCAT Master
and first EtherCAT Slave
(100 MBit/s, Full Duplex)
EtherNet/IP
allowed
allowed
(10 MBit/s/100 MBit/s,
Full or Half Duplex, Auto-Negotiation)
Open Modbus/TCP
allowed
allowed
(10 MBit/s/100 MBit/s,
Full or Half Duplex, Auto-Negotiation)
POWELINK
allowed forbidden
PROFINET IO RT
forbidden
Only allowed, if the switch supports ‚Pri-
ority Tagging’ and LLDP
(100 MBit/s, Full Duplex)
SERCOS III
forbidden forbidden
Table 66: Use of Hubs and Switches
When using older NT 50-xx-EN respectively NT 50 xx-RS devices, then fol-
low:
Failure of the Network Communication
!
Do not operate hardware with the communication controllers netX 50,
netX100 or netX 500 with the protocols Ethernet TCP/UDP/IP,
EtherNet/IP or Modbus TCP at 10 MBit/s in half-duplex mode, otherwise
failure of the network communication can occure.
!
Use only switches or 10/100 MBit/s dual-speed hubs and ensure that
the network operates at 100 MBit/s and in full-duplex mode.
For further information refer to section
