DOLD LG 7927 Manuel d'utilisation - Page 3

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Operating instructions

SAFEMASTER

Delay module, on delayed

LG 7927

Before installing, operating or maintaining this device, these instructions

must be carefully read and understood.

DANGER

Dangerous voltage.

Electric shock will result in death or serious injury.

Disconnect all power supplies before servicing equipment.

CAUTION

Safe operation of the device is only guaranteed when using certified

components!

Important Notes

The product hereby described was developed to perform safety functions

as a part of a whole installation or machine. A complete safety system

normally includes sensors, evaluation units, signals and logical modules

for safe disconnections. The manufacturer of the installation or machine

is responsible for ensuring proper functioning of the whole system. DOLD

cannot guarantee all the specifications of an installation or machine that

was not designed by DOLD. The total concept of the control system into

which the device is integrated must be validated by the user. DOLD also

takes over no liability for recommendations which are given or implied in

the following description. The following description implies no modification

of the general Contrinex terms of delivery, warranty or liability claims.

Safety Regulations

This device must be installed and operated by trained staff who are

familiar with these instructions and with the current regulations for safety

at work and accident prevention.

Pay attention to applicable local regulations, especially regarding safety

measures.

The shock protection on the connected elements and the cable insulation

must be designed for the highest voltage applied to the device.

Opening the device or implementing unauthorized changes voids any

warranty

The unit should be panel mounted in an enclosure rated at IP 54 or

superior. Dust and dampness may lead to malfunction.

Adequate fuse protection must be provided on all output contacts with

capacitive and inductive loads.

The safety function must be triggered during commissioning

Designated use

The LG 7927 is used to start or to delay a movement or to enable safety

interlocks as e.g. SAFEMASTER STS.

When used in accordance with its intended purpose and following these

operating instructions, this device presents no known residual risks. Non-

observance may lead to personal injuries and damages to property.

Main features

Your advantage

• Easy to realise safe timing circuits

• 4 positive guided output contacts at only 22.5 mm width

Features

• According to

- Performance Level (PL) d and category 3 to EN ISO 13849-1: 2008

- SIL Claimed Level (SIL CL) 2 to IEC/EN 62061

- Safety Integrity Level (SIL) 2 to IEC/EN 61508 and IEC/EN 61511

when connected to a suitable safety module

• Adjustable time delay

• As option fixed time delay

• High long life stability due to digital time base

• Adjustable with or without cross fault detection

• Output: 3 NO contacts + 1 NC contact + 1 positive guided

feedback contact

or 4 NO contacts + 1 1 positive guided feedback contact

• LED indicator for channel 1, 2 and operation voltage

• Removable terminal strips

- LG 7927:

fixed screw terminals

- LG 7927 PS:

plug in screw terminals

- LG 7927 PC:

plug in cage clamp terminals

All technical data in this list relate to the state at the moment of edition. We reserve the right for

technical improvements and changes at any time.

ENGLISH

Safety notes

Attention!

Connection Terminals

Terminal designation

A1 (+)

A2 (-)

S11, S21

Y1, Y2

17, 18, 27, 28, 37, 38, 47, 48

45, 46

55, 56

Indication

LED "Power":

LED K1t and K2t:

Function diagram

U N

A1/A2

17-18

27-28

37-38

45-46

55-56

ORIGINAL

To achieve the safety levels stated under features, a the

supervising control must check the NC contact 55/56 be-

fore starting to make sure that both relays (Kt1 and Kt2)

are switched off.

Signal designation

+ / L

- / N

Inputs

Outputs

Positive driven NO contacts for

release circuit

Positive guided indicator output

Positive guided feedback circuit

on, when supply connected

on, when relay K1t and K2t energized

M10115

LG 7927 / 141119 / 486