Installation and Connection
3-46 | CFW-11M G2
3
Circuit operation of SS1 function from
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 is required to apply STO1 and STO2 signals again (to close terminals 13 to 23
and 23 to 24) and apply a pulse on inverter DI1 input (START).
3.3.3 Technical Specifications
3.3.3.1 Electrical Control Characteristic
Table 3.27:
Electrical control characteristic
Inputs of the Safety Stop function
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
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
General requirements IEC 61508 and/or EN 954-1 and/or ISO 13849-1
Output requirements Number of current paths: 2 independent paths (one for each STO path)
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/ Instrutech CPt-D
3.3.3.2 Operating Safety Characteristic
Table 3.28:
Operating safety characteristic
Protection
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
process
Safety Stop function which forces stopping and/or prevents the motor from restarting unintentionally,
conforming to IEC/EN 61508 level SIL2 and IEC/EN 61800-5-2
3.4 INSTALLATIONS ACCORDING TO THE EUROPEAN ELECTROMAGNETIC
COMPATIBILITY DIRECTIVE
The CFW-11M G2 inverters, when correctly installed, meet the requirements of the EMC Directive 2004/108/EC.
The CFW-11M G2 inverter series has been designed only for industrial applications. Therefore, the emission limits
of harmonic currents defined by the standards EN 61000-3-2 and EN 61000-3-2/A14 are not applicable.
3.4.1 Conformal Installation
For conformal installation use:
Standard CFW-11M G2 inverter for emission levels according to IEC/EN61800-3 “Adjustable Speed Electrical
Power Drive Systems”, category C4.
Shielded output cables (motor cables) with the shield connected at both ends, motor and inverter, with low-
impedance connection for high frequency. Keep the separation from the other cables according to
.
If you wish Category C3 conducted emission level, use external RFI filter on the inverter input. For more information
(RFI filter code, motor cable length and emission levels) refer to
.
Shielded control cables, keeping the separation distance from other cables according to
.
