20
URB 60 - Installation & Operating Manual -
819699-00
Use a SELV power supply unit for connecting the supply voltage. For connection to the sup-
plied 3-pole connector, use a cable with a max. cross-section of 2.5 mm
2
.
Fig. 5
Connecting the supply voltage
3-pole connector, supplied
(Phoenix Contact MSTB 2.5 / 3-ST-5.08)
Cable cross-section (strand or wire):
■
■
min. 0.5 mm
2
■
■
max. 2.5 mm
2
+ 24 V
- 0 V
+24 V DC
- 0 V
PE
24 V DC socket on the unit
Connecting the CAN bus system
Bus line, cable length and cross-section
■
■
Use a shielded, multi-core, twisted-pair control cable, e.g. UNITRONIC
®
BUS CAN 2 x 2 x .. mm
2
or
RE-2YCYV-fl 2 x 2 x .. mm
2
, as the bus line.
■
■
Pre-wired control cables (with plug and coupling) are available as accessories in various lengths.
■
■
The baud rate (transfer rate) is determined by the cable length between the bus terminal devices, and
the wire cross-section is determined by the overall power input of the measuring sensors.
■
■
0.2 A at 24 V is required per sensor. With five sensors, there is therefore a voltage drop of approx. 8 V
per 100 m when using cables of 0.5 mm². In this case, the system is operating at its limits.
■
■
With five or more sensors and a cable length of ≥ 100 m, the wire cross-section needs to be doubled
to 1.0 mm².
■
■
At larger distances of > 100 m, the 24 V DC supply can also be connected on site.
