WEG CFW-11 Guía De Instalación, Configuración Y Operación página 6

Safety Stop Function
XC25:1 2
V1
+5 V
S2
X1:
DC+
Rectifier
X1:
R/L1
S/L2
T/L3
X1:
DC-
+5 V
S1
V1
XC25:3 4
V1 = inverter internal voltage.
CFW-11M (more specifically power units) do not have R/L1, S/L2 and T/L3 terminals, They are fed by a DC voltage
only, SRBXX board is located on the control unit – in this case, K1 and K2 safety relays actuate on the fiber optic
transceivers that send PWM pulses to power units (UP11-XX) for firing the IGBTs.
Figure 1: Basic block diagram of safety stop function available in CFW-11, CFW-11M and CFW70x inverter
6 | CFW-11, CFW-11M, CFW70X
Control circuit (Microcontroller+EPLD)
SR1
S1
K1
Gate
driver
circuit
DC Link
capacitors
Gate
driver
circuit
K2
S2
Gate Gate
driver driver
circuit circuit
Gate Gate
driver driver
circuit circuit
series
XC1
SR2
Digital (Relay)
outputs
X1
U/T1
V/T2
Motor
W/T3