Notes On Current Measurements Using Hall Sensors - Beckhoff EL72 1-901 Series Manual

Notes on motion devices
• Motor overtemperature
Motor overtemperature sensing is not provided by the drive.
• Application for compact motion devices
The modules are intended for use only within Beckhoff's Programmable Controller sys-
tem Listed in File E172151.
• Galvanic isolation from the supply
The modules are intended for operation within circuits not connected directly to the sup-
ply mains (galvanically isolated from the supply, i.e. on transformer secondary).
• Requirement for environmental conditions
For use in Pollution Degree 2 Environment only.
Basic principles
UL certification according to UL508. Devices with this kind of certification are marked by this sign:
Application
If terminals certified with restrictions are used, then the current consumption at 24 V
accordingly by means of supply
• from an isolated source protected by a fuse of max. 4 A (according to UL248) or
• from a voltage supply complying with NEC class 2.
A voltage source complying with NEC class 2 may not be connected in series or parallel with another
NEC class 2compliant voltage supply!
These requirements apply to the supply of all EtherCAT bus couplers, power adaptor terminals, Bus
Terminals and their power contacts.
4.14

Notes on current measurements using Hall sensors

The device described in this documentation features one or several integrated Hall sensor for the purpose of
current measurements.
During this process, the Hall sensor monitors the magnetic field generated by a current flowing through a
conductor.
In order to prevent compromising the measurement we recommend screening exterior magnetic fields from
the device, or to keep such fields at an adequate distance.
EL72x1-901x Version: 1.9
Installation
must be limited
DC
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