Power Measurement At A Fieldbus Station - Beckhoff EL34 Series Documentation

7.4

Power measurement at a fieldbus station

Risk of injury through electric shock and damage to the device!
Bring the Bus Terminal system into a safe, voltage-free state before starting mounting, disassembly or
wiring of the Bus Terminals!
The example illustrates power measurement at three circuits of the fieldbus station. The terminal measures
the:
• Power consumption of the Bus Coupler and E-bus supply
• Power consumption of the power contacts
• Power consumption AS-i over the AS-i potential feed terminal (EL9520)
Note rated current!
In the example, the special type EL3443-0010 is used with an extended current measuring range
(5 A max.). The standard EL3443 type is not suitable for this application example because the current mea-
suring range is too small (1 A)!
Fig. 166: Application example - power measurement at a fieldbus station
EL34xx
WARNING
NOTE
Version: 1.5
Application examples
265