WEG CFW-11 User Manual - page 69
Installation and Connection
3
CFW-11 | 3-43
Start
Stop
CFW-11
XC1:1 - DGND*
XC1:12 - COM
XC1:13 - +24 V
XC1:15 - DI1
XC1:16 - DI2
XC25:2 - GND (R1-)
XC25:1 - STO1 (R1+)
XC25:3 - STO2 (R2+)
Safety Stop
XC25:4 - GND (R2-)
(a) STO or SS0 safety function (without an external safety relay)
Start
A1 A2
14 24 48 58
13 23 47 57
Stop
CFW-11
XC1:11 - DGND*
XC1:12 - COM
XC1:13 - +24 V
XC1:15 - DI1
XC1:16 - DI2
XC25:2 - GND (R1-)
XC25:1 - STO1 (R1+)
XC25:3 - STO2 (R2+)
XC25:4 - GND (R2-)
External
safety relay
(b) SS1 safety function with an external safety relay
(*)
(*) For specifications of external safety relay, which is required to realize SS1 (stop category 1), refer to
Item 3.3.4 Technical Specifications
on page 3-44
.
Figure 3.26 - (a) and (b) - Inverter control wiring examples (XC1 and XC25 terminals) to realize STO (or SS0, i.e., stop
category 0) and SS1 (stop category 1) safety functions according to IEC/EN 61800-5-2 and IEC/EN 60204-1 standards -
DI1 and DI2 inputs set as 3-wire start/stop commands
Circuit operation of SS1 function from
Figure 3.26 on page 3-43
:
In this case, when the activation command is given to the external safety relay, safety relay opens inverter DI2
signal (via terminals 23 to 24) and motor is decelerated first by the inverter (via deceleration ramp). When
the time delay set at the external safety relay expires (this delay must be higher than required time to stop the
motor, taking into account deceleration time set on the inverter and inertia of the motor load), the safety relay
delayed contacts (terminals 47 to 48 and 57 to 58) opens inverter STO1 and STO2 signals and the inverter
Safety Stop function is activated. The motor stops according to category 1 (SS1) of standard IEC/EN 60204-1.