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5981_en_06 PHOENIX CONTACT
67
A Technical appendix: The field multiplexer with different
transmission media
The following sections describe a quick startup of the field multiplexer system when different
transmission media are used.
Further information can be found in the documentation for the products used. It can be
downloaded from phoenixcontact.net/products .
A 1 Transmission over copper cable
Figure A-1 Basic circuit diagram: Transmission over copper cable
Key:
When a field multiplexer system is being installed for the first time, Phoenix Contact
recommends a 3-wire shielded cable. In this case, connector1 of both stations should be
connected to the DATA, DATA, and GND
DATA
signals and the shield (see also Section
“Terminal point assignment” on page 18). DATA and DATA should additionally be a twisted
pair.
Laying the remote bus cable
When laying the remote bus cable, note the following:
– Do not lay signal and bus cables in parallel to power cables
– If possible, lay remote bus cables and cables with voltages of 230 V and above in
separate cable ducts
– Always lay signal leads and equipotential bonding together in one cable following the
shortest route
– Avoid extending the remote bus cables with connecting plugs
5981A041
MUX 1 MUX 2
CU
DATA
GND
DATA
SHD
DATA
DATA
GND
DATA
SHD
DATA
DATA
GND
DATA
SHD
DATA
MUX IB IL 24 MUX MA-PAC
CU Copper cable, for example, IBS RBC METER-T from
Phoenix Contact
No jumper must be installed from 1.1 to 2.1 (CONF
FO
) on connector 1 of both field
multiplexers.
Phoenix Contact recommends the remote bus cable IBS RBC METER-T
(Order No. 2806286, see also Section “Ordering data” on page 65 or the AUTOMATION
catalog).
If you require further information on the selection of suitable remote bus cables, please
contact Phoenix Contact.