Technical Data; Electrical Control Characteristic; Operating Safety Characteristic - WEG CFW11W G2 Series User Manual

Circuit operation of SS1 function of
In this case, when the activation command in sent to the external safety relay, the safety relay opens DI2 signal of
the inverter (through terminals 23 to 24) and the motor is decelerated first by the inverter (via deceleration ramp).
When the delay established on the external safety relay expires (this delay must be longer than the time necessary
to stop the motor, taking into account the deceleration time defined on the inverter and the inertia of the motor
load), the contacts with delay of the safety relay (terminals 47 to 48 and 57 to 58) open STO1 and STO2 inverter
signals and the Safety Stop function is enabled. The motor stops according to category 1 (SS1) of IEC/EN 60204-1.
In order to drive the motor again, it is necessary to apply STO1 and STO2 signals again (close terminals 13 to 23
and 23 to 24) and apply a pulse to the inverter DI1 input (START).

3.3.3 Technical Data

3.3.3.1 Electrical Control Characteristic

Inputs of the Safety Stop function
For specifications of the external safety
relay (only when SS1 function is required
according to IEC/EN 61800-5-2 and IEC/
EN 60204-1), see Figure 3.49 on page 3-44

3.3.3.2 Operating Safety Characteristic

Of the Safety Stop function that forces the stop and/or prevents the motor from being inadvertently started,
machine according to EN 954-1 / ISO 13849-1 category 3, IEC/EN 61800-5-2 and IEC/EN 60204-1
Protection
Of the system Safety Stop function that forces the stop and/or prevents the motor from being inadvertently started,
process according to IEC/EN 61508 level SIL2 and IEC/EN 61800-5-2
Figure 3.49 on page 3-44:
Table 3.29: Electrical control characteristic
XC25:1-2, XC25:3-4 2 independent inputs for the Safety Stop function.
Power Supply: 24 Vdc (max. 30 V)
Impedance: 960 Ω
Status 0 if < 2 V, status 1 if > 17 V
General IEC 61508 and/or EN 954-1 and/or ISO 13849-1
requirements
Output Number of current paths: 2 independent paths (one for each STO path).
requirements Switching voltage capacity: 30 Vdc per contact
Switching current capacity: 100 mA per contact
Maximum switching delay between contacts: 100 ms
Example Type/manufacturer: WEG / CPt-D
Table 3.30: Operating safety characteristic
Installation and Connection
CFW-11W G2 | 3-45
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