SITEMA KRGP Series, Operating Manual

Follow this procedure:

1. Secure the maximum load which can occur in operation with the Safety

Lock - see 

Chapter 9.2 Securing the load

 [

}

 24].

2. Actuate the drive so that its power (in load direction) corresponds to half

the maximum load.

ð

Depending on type, the clamping rod moves a maximum of 2 mm
(with spring base: 7 to 8 mm) relative to the Safety Lock (tapering dis-
tance).

ð

The clamping rod must not slip (further) under this load.

ð

If this is the case, a holding force reserve of 50 % has been verified and
the test is passed.

8.1.2   Non-safety-related application

For a non-safety-related application, SITEMA recommends a test force that is
calculated from the 

maximum occurring force during ope safety

margin

. The safety margin is to be determined by the customer (machinery

manufacturer, operator) for the respective application.

The maximum test force amounts to 2 x the admissible load M. Higher loads
can lead to damage to the Safety Lock and machine.

Max. load in operation (≤ admissible load (M))

+

Safety margin

=

Test force

Practical example: 
Admissible load (M) = 12 kN
Max. load in operation = 10 kN
Customer-specific safety margin = 30 % maximum load = 3 kN

10 kN (max. load in operation)

+

3 kN (30 % max. load in operation)

=

13 kN (test force)

Follow this procedure:

1. Secure the maximum load that can occur during operation with the

Safety Lock, see 

Chapter 9.2 Securing the load

 [

}

 24]

2. Actuate the drive so that its force (in load direction) corresponds to the

safety margin.

ð

Depending on type, the clamping rod moves by the a maximum of
2 mm (with spring base: 7 to 8 mm) relative to the Safety Lock (taper-
ing distance).

ð

The clamping rod must not slip (further) under this load.

ð

If this is the case, a holding force reserve of 50 % has been verified and
the test is passed.

8.2   Testing proximity switch functionality

The proximity switches send two signals:

• signal 1 “load secured”

• signal 2 “clamping released”

Operating Manual

Safety Locks series KRGP

Pneumatic / compressive load

Original instructions BA-S12-en-1-15

© SITEMA GmbH & Co. KG . G.-Braun-Straße 13 . 76187 Karlsruhe (Germany) . Phone: +49(0)721/98661-0 . Fax: -11 . www.sitema.com

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