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

Option Kits and Accessories
Operation:
1. The Safety Stop function is activated by disconnecting the 24 Vdc voltage from the safety relay coil (XC25:1(+)
and 2(-); XC25:3(+) and 4(-)).
2. Upon activation of the Safety Stop, the PWM pulses at the inverter output will be blocked and the motor will
coast to stop.
The inverter will not start the motor or generate a rotating magnetic field even in the event of an internal
failure (pending certification).
The keypad will display a message informing that the Safety Stop is active.
3. Apply 24 Vdc voltage to the safety relay coil (XC25:1(+) and 2(-); XC25:3(+) and 4(-)) to get back to normal
operation after activation of the Safety Stop.
Connector XC25
1
2
3
4

7.1.4 24 Vdc External Control Power Supply

7
Inverters with the following codification: CFW11XXXXXXOW.
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 figure 7.2) or by the standard internal
switched-mode power supply of the inverter.
7-2
Figure 7.1 - Location of the SRB2 board in the frame size E CFW-11 inverters
Table 7.1 - XC25 connections
Function
R1+ Terminal 1 of relay 1 coil
R1- Terminal 2 of relay 1 coil
R2+ Terminal 1 of relay 2 coil
R2- Terminal 2 of relay 2 coil
Specifications
Rated coil voltage: 24 V, range from 20 to 30 Vdc
Coil resistance: 960 Ω ±10 % @ 20 °C (68 °F)
Rated coil voltage: 24 V, range from 20 to 30 Vdc
Coil resistance: 960 Ω ±10 % @ 20 °C (68 °F)