Compax3M With Safety Option S1: Safe Torque Off; 3.11.1. General Description; Important Terms And Explanations - Parker Compax3 Series Operating Instructions Manual

Parker EME
3.11

Compax3M with safety option S1: Safe torque off

In this chapter you can read about:
General Description............................................................................................................87
STO function on the Compax3M ........................................................................................90
Compax3M STO application description ............................................................................93
STO function test................................................................................................................98

3.11.1. General Description

In this chapter you can read about:

Important terms and explanations ......................................................................................87

Intended use.......................................................................................................................88
Advantages of using the "safe torque off" safety function. .................................................89
3.11.1.1
Term
Safety category 3 according to
EN 954-1 or EN ISO 13849-1:2007
"Safe torque off"
or abbreviated:
STO=Safe torque off
Start inhibitor
The present documentation assumes a basic knowledge of our drive controllers as
well as an understanding of safety-oriented machine design. References to stan-
dards and other regulations are only rudimentarily expressed.
For complementary information, we recommend the respective technical literature,
e.g.:
BIA Report 6/97 and BIA Report 5/2003 (Information issued by the german go-
vernment safety organization)
Download under: http://www.hvbg.de/d/bia/pub/rep/index.html
http://www.hvbg.de/d/bia/pub/rep/index.html
Important terms and explanations
Explanation
Definition according to standard:
Circuit with safety function against individual faults
Some, but not all faults are detected.
An accumulation of faults may lead to a loss of the safety function.
The remaining risk is accepted.
The determination of the safety category required for an application (risk analysis) lies within the
responsibility of the machine manufacturer.
It can take place according to the method described in EN ISO 13849-1:2007, appendix A.
With the "safe torque off", the energy supply of the drive is safely interrupted according to EN
1037, paragraph 4.1.
The drive is not to be able to produce a torque and thus dangerous movements (see EN 1037,
paragraph 5.3.1.3).
The standstill position must not be monitored.
If an external force effect, e.g. a drop of hanging loads, is possible with the "safe torque off",
additional measures to safely prevent those must be provided (e.g. additional mechanical brakes).
The following measures are appropriate for a "safe torque off":
Contactor between mains and drive system (mains contactor)
Contactor between power section and motor (motor contactor)
Safe blocking of the power semiconductor control (start inhibitor)
Safe blocking of the power semiconductor control.
With the aid of this function, you can obtain a "safe torque off".
192-120114 N5 C3I22T11 June 2008
Compax3 device description
87