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Data line for DL-Bus
The DL-Bus consists of just 2 wires:
DL
and
GND
(sensor earth). The DL-Bus itself supplies the nec
-
essary power for the DL-Bus sensors.
Cables can be routed with a star topology but also in serial formation (from one device to the next).
Any cable with a cross-section of 0.75 mm² up to 30 m in length can be used as data cable. For longer
cables, we recommend the use of a screened cable.
If screened cables are used, the screen must be connected to GND
Long cable conduits routed closely next to each other for mains and data cables result in faults being
induced into the data cables from the mains. We therefore recommend a minimum clearance of 20
cm between two cable conduits or the use of screened cables.
Use separate, screened cables when capturing data from two controllers with a single datalogger.
Never run the data cable together with a CAN-Bus cable in the same conduit.
Terminal diagram for DL-Bus
Bus load of DL sensors
A 2-pole cable provides both the power supply and the signal transfer from DL-Bus sensors. An ad
-
ditional power supply by means of an external power supply unit (such as with the CAN-Bus) is not
possible directly, but some DL-Bus devices can have their bus load reduced via an external 12V sup
-
ply (only if explicitly stated).
Take the „BUS load“ into consideration as sensors have a relatively high current demand:
The controller UVR65 supplies a maximum bus load of 100%. The bus loads of the electronic sensors
are listed in the technical data of the relevant sensors.
Example: The electronic sensor FTS4-50DL has a BUS load of 25 %. Consequently up to four FTS4-
50DL can be connected to the DL BUS.
Summary of Contents for UVR65
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