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ESERA GmbH. Errors and technical modification subject to change.
ESERA GmbH, ESERA-Automation 2020
www.esera.de
11134 V2.0 R1.0 Manual
Page 4 of 6
12
Pin assignment
The temperature and humidity sensor is connected via push-in terminals (screwless terminal) or RJ45 modular
socket. The connection terminal is intended for solid cables with a cross section of 0.2 to 2.5 sq. mm or fine
stranded cables with a cross section of 0.2 to 1.5 sq. mm.
The terminal assignment of the screw terminals is printed on the printed circuit board. The correct polarity must
be observed when connecting.
The Multisensor must be supplied with three cables (ground, 1-Wire Data and 5V). The parasitic mode is not
supported.
Pin assignment RJ45 socket
1 = GND
5= GND
2 = +5V
6 = not connected
3 = GND
7 = not connected
4 = 1-Wire
8 = GND
1-Wire primary and 1-Wire secondary
not connected
Note:
Basics and tips for the 1-Wire bus system can be found on the ESERA website at
https://www.esera.de/service-support/1-wire-grundlagen/
13
1-Wire Network Cabling
For short connection lengths, no special requirements are placed on the cable used. With unshielded cable,
e.g. telephone cable J-Y(St)Y telephone line 4x2x0.8, 1-wire networks can be set up in star or tree wiring of
approx. 30 - 80m. We recommend the use of CAT 5-7 network cable for installation. For cable assignment
you will find a recommendation in the article download.
Shielded cable, e.g. CAT5 or CAT6 cable should be used in the Smart Home, in commercial buildings and in
industrial environments. This ensures a very good system stability of the entire system. Another advantage
of cabling with CAT cable is that a linear bus topology can be achieved despite star-shaped cable routing in
buildings. This is only possible due to the 8-wire cable structure of the CAT cable.
When using CAT7 cable, the maximum possible cable length of the entire 1-wire network is reduced due to
the stronger shielding and the resulting higher cable capacity.
With star or tree cabling with CAT cable, a total length of approx. 50-100m can be calculated, which
corresponds to 1-2 floors in a residential building.
In general, unnecessary cable connections, branches or cable extensions should be avoided. Each joint or
clamp connection reduces the maximum available network size.
The special feature of wiring multi-sensors with 1-Wire BUS technology is that all sensors are operated via a
three-wire cable. Both power supply and data communication take place via the bus line.
14
Operating conditions
The module may only be operated at the specified voltages and ambient conditions. The device can be
operated in any position. The device is intended for use in dry and dust-free rooms.
If condensation is formed, wait at least 2 hours for the unit to acclimatize.
Do not operate the module in an environment in which flammable gases, vapors or dusts are present or may
be present.
15
Assembly
The Multisensor should be mounted upright with the ventilation openings at the top and bottom. It is intended for
temperature and humidity measurement of air and gases in indoor areas, such as living rooms, offices,
workshops or public facilities. The measured values specified under technical data are limit data for the entire 1-
Wire Multisensor and must not be exceeded or fallen short of, as the Multisensor may otherwise be damaged.
