Technical Specifications; Electrical Control Characteristics; Operational Safety Characteristics - WEG CFW-11 Guía De Instalación, Configuración Y Operación

Circuit operation of SS1 function (figures 4c and 4d):
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. In order to drive
the motor again, it's required to apply STO1 and STO2 signals again (to close terminals 13 to
23 and 23 to 24) and to have a pulse on inverter DI1 input (to apply a pulse on START switch).

5 TECHNICAL SPECIFICATIONS

5.1 ELECTRICAL CONTROL CHARACTERISTICS

Safety stop function inputs XC25:1-2, XC25:3-4
External
safety relay specifications
(only when SS1 function is
required according to IEC/
EN 61800-5-2 and IEC/EN
60204-1 standards – refer
to figures 4c/4d).

5.2 OPERATIONAL SAFETY CHARACTERISTICS

Protection
NOTE!
Certification of the product is in annex.
2 independent inputs for safety stop function.
Power supply: 24 Vdc (max. 30 V)
Impedance: 960 Ω
State 0 if < 2 V, state 1 if > 17 V
General requirements IEC 61508 and/or EN 954-1 and/or ISO 13849-1
Output requirements No. of current paths: 2 independent paths (one for
each STO path)
Switching voltage capability: 30 Vdc per contact
Switching current capability: 100 mA per contact
Maximum switching delay between contacts: 100 ms.
Example Type/manufacturer: WEG / Instrutech CPt-D.
Of the machine Safety stop function which forces stopping and/or
prevents the motor from restarting unintentionally,
conforming to EN 954-1 / ISO 13849-1 category 3,
IEC/EN 61800-5-2 and IEC/EN 60204-1.
Of the system Safety stop function which forces stopping and/or
process prevents the motor from restarting unintentionally,
conforming to IEC/EN 61508 level SIL2 and
IEC/EN 61800-5-2.
Safety Stop Function
CFW-11, CFW-11M, CFW70X | 13