Requirements On The Power Supply; Additional Measures - WAGO TEchDocs 765-4501/0100-0000 Manual

Planning

6.2.2 Requirements on the Power Supply

Power Source
Note
PELV or SELV power source required
Only device the product with 24 VDC PELV (Protective Extra Low Voltage) or SELV
(Safety Extra Low Voltage) voltage sources. Failure to do so may result in electric shock.
If L1 and L2 are to be supplied separately (e.g., for safe switch-off of L2), then either cen-
tral grounding must be implemented using two power supply units, or the power supply
connection must be made on the same phase. However, the use of two separate power
supply units is not mandatory.
Note
Note the following when L1 and L2 are supplied separately:
If L1 and L2 are to be supplied separately (e.g., for safe switch-off of L2), then either cen-
tral grounding must be implemented using two power supply units, or the power supply
connection must be made on the same phase. Use of two separate power supply units is
not mandatory.
Fuse Protection
Always protect the power supply lines from the power supply unit to the first module with
a device circuit breaker or fuse. For this purpose, use a 24 VDC / max. 16 A fuse or cir-
cuit breaker with type B trip characteristics.
Note
Device damage if maximum supply current exceeded
The maximum supply current must not be exceeded. Otherwise, there is a risk of damage
to the PCB of the device and the pluggable connector.

6.2.3 Additional Measures

The setup must ensure that the total current the flows back through pin 3 does not ex-
ceed the load limit.
The values of all currents on all pins of all connections (except for pin 3 = ground pin) and
the calculated total currents of the two supply cables are measured by the chip used in
the 765 Series products and thus can be recorded by a monitoring application. These val-
ues can be accessed via the OPC UA server, for example.
On the basis of these measured values, a monitoring application with integrated current
management can be implemented. This can regularly verify that all monitoring functions
are satisfied on the basis of the measured current values and also monitor the tempera-
tures and voltages on the connections.
60 Product manual | Version: 1.1.0
8PORT IOL-A FLD EI DC 24V 2.0A
765-4501/0100-0000