WEG CFW-11 User Manual - page 70

Installation and Connection

3

3-44 | CFW-11

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).

3.3.4 Technical Specifications

3.3.4.1 Electrical Control Characteristics

Safety stop function inputs

XC25:1-2, XC25:3-4

2 independent inputs for Safety Stop function

Power supply: 24 Vdc (max. 30 V)

Impedance: 960 Ω

State 0 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 

Figure 3.26 on page 3-43 

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 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

3.3.4.2 Operational Safety Characteristics

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 INSTALLATION ACCORDING TO THE EUROPEAN DIRECTIVE OF ELECTROMAGNETIC 

COMPATIBILITY

The CFW-11 inverters with frame sizes F, G and H feature internal RFI filter to reduce the electromagnetic 

interference. 

These inverters, when properly installed, meet the requirements of the electromagnetic compatibility directive 

‘’EMC Directive 2014/30/EU’’.

The CFW-11 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.

 ATTENTION!

For using models with internal RFI filters in IT networks follow the instructions on 

Item 3.2.3.1.2 IT 

Networks on page 3-22

.

3.4.1 Conformal Installation

For the conformal installation use:

1.  Shielded output cables (motor cables) with the shield connected at both ends, motor and inverter, by means 

of a low impedance to high frequencies connection.

  Use the clamps supplied with the product, making sure there is a good contact between the shield and that 

clamp.