Art. No. 11162
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ESERA GmbH, ESERA-Automation 2020
www.esera.de
11162 V2.0 R1.0 Manual
Page 3 von 5
6
Assignment RJ45 socket (input/output)
The Push In terminal and the RJ45 socket are connected in parallel, which means that both connections can be
used equally.
Socket assignment
1
GND
2
+5VDC
3
GND
4
1-Wire Data
5
GND
6
unoccupied
7
+12VDC
8
GND
7
1-Wire Network
You can find basic information and tips on the 1-Wire bus system in the ESERA Online Shop at:
https://www.esera.de/1-wire-grundlagen/
or you can find from our eBook in the shop under
training/documentation (
https://www.esera.de/service-support/dokumentation/352/grundlagen-1-wire-bus-
8
What does "Linear Topology" mean?
You wire 1-Wire sensors in your building with individual CAT cables and lead the cables to a central location, e.g.
a distribution cabinet. At each 1-Wire sensor you connect the primary and secondary data line in the 1-Wire
terminal. In the distribution cabinet, connect the 5V, GND, secondary and primary data lines to one output of the
Extender 4.
You start with the cable to the
first 1-Wire sensor at terminal X3
second 1-Wire sensor is connected to terminal X2
third 1-Wire sensor is connected to terminal X1
and so on
until you connect the last 1-Wire sensor to terminal X7. The now linear 1-Wire network is terminated with
the secondary data line of the last sensor. For this purpose a passive termination resistor of 4.7kOhm is
integrated within the 1-Wire Extender 4.
Due to the cabling, your 1-Wire sensors are wired in a "star shape", but electrically in a linear topology, which is
the most stable installation form for a 1-Wire network.
Note: Make sure that the total cable length is not more than 50-100m.
8.1 Assignment of CAT cables (ESERA, Maxim and 1-Wire.org)
The ESERA-Automation standard for 1-wire cabling is based on a standardization proposal of 1-Wire.org
(
http://www.1wire.org/en-us/p_2.html
).
The following definition is an extension of, and does not contradict, the above standard.
1-Wire Pin Assignment (colour specifications according to EIA/TIA 568A (left) or EIA/TIA 568B (right))
1 Green/White
Main supply GND
Orange/White
2 Green
Main (pref5V/50mA for 1-Wire devices)
Orange
3 Orange/White
Secondary 1-Wire Bus GND
Green/White
4 Blue
Primary 1-Wire Bus
Blue
5 Blue/White
Primary 1-Wire Bus GND
Blue/White
6 Orange
Secondary 1-Wire Bus
Green
7 Brown/White
Auxiliary (for other consumers, e.g. +12V/200mA)
Brown/White
8 Brown
Auxiliary supply GND
Brown
The only difference between the two colour versions is the interchange of the wire pairs green / green-white and
orange / orange-white. The decisive factor is compliance with the pin numbers.
