Vdc External Control Power Supply - WEG CFW-11 User Manual

Option Kits and Accessories

7.1.5 24 Vdc External Control Power Supply

Inverters with the following codification: CFW11...O...W...
The use of this option kit is recommended with communication networks (Profibus, DeviceNet, etc.), since the
control circuit and the network communication interface are kept active (with power supply and responding to
the network communication commands) even in the event of main power supply interruption.
Inverters with this option have a built-in DC/DC converter with a 24 Vdc input that provides an adequate output
for the control circuit. In such manner the power supply of the control circuit will be redundant, i.e., it can be
provided by a 24 Vdc external power supply (connection as shown in
standard internal switched-mode power supply of the inverter.
Observe that the inverters with the external 24 Vdc power supply option use terminals XC1:11 and 13 as the input
for the external power supply and no longer as an output as in the standard inverter
In case of interruption of the external 24 Vdc power source, the digital inputs, outputs and analog outputs will
have no power supply, even if the mains power is on. Therefore, it is recommended to keep the 24 Vdc power
source always connected to terminals XC1:11 and 13.
The keypad displays warnings indicating the inverter status: if the 24 Vdc power source is connected, if the
mains power source is connected, etc.
7
7-2 | CFW-11
Figure 7.1 on page 7-3) or by the
(Figure 7.1 on page 7-3).