9
Data cable 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, and measuring up to 30 m in length, can be used as a
data link. For lengths greater than 30 m, the use of screened cables is recommended, which increas
-
es the reliable length of the cable to 100 m.
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, DL bus data cable
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.
Take the
"Bus load"
into consideration as sensors have a relatively high current demand:
The UVR610 supplies a
total
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.
CORA devices
CORA devices can be connected to the UVR610 controller by cable (software version 1.09 or higher).
They are connected at the controller's DL bus. CORA devices connected in this way have no effect
on the DL bus load or other DL devices. If using CORA-DL, ensure correct polarity.
