12
Electrical Connection
- continued -
CAN bus voltage supply
To ensure the troublefree operation of the CAN bus system make sure that the voltage supply is
sufficient.
Please use the following table to check the voltage supply of your bus system.
Control unit with
voltage supply
Qty.
x
Power output per item
=
Sum 1
x
6 W
=
W
Sensor, transmitter, control
units, operating & display unit
URB 1
Qty.
x
Power consumption per item
=
Sum
x
3 W
=
W
Operating & display unit
URB 2
x
5 W
=
W
Sum 2
=
W
If sum
2
exceeds sum
1
supply the CAN bus with 24 V DC coming from a separate and stabilized safety
power supply unit (e. g. SITOP Smart 24 V 2.5 A).
The power supply unit must be in accordance with DIN VDE 0106 (safety separation) and fused with an
overcurrent protective device to EN 61010-1 / VDE 0411.
Do not connect the CAN bus supply to the control units (terminals 1 and 5).
