3
LG 7927 / 141119 / 486
Operating instructions
ENGLISH
SAFEMASTER
Delay module, on delayed
LG 7927
0264222
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.
Designated use
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 co 1 NC c 1 positive guided
feedback contact
or 4 NO co 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
Connection Terminals
Before installing, operating or maintaining this device, these instructions
must be carefully read and understood.
DANGER
CAUTION
Dangerous voltage.
Electric shock will result in death or serious injury.
Disconnect all power supplies before servicing equipment.
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
Safety notes
Attention!
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.
Indication
LED "Power":
on, when supply connected
LED K1t and K2t: on, when relay K1t and K2t energized
Terminal designation
Signal designation
A1 (+)
+ / L
A2 (-)
- / N
S11, S21
Inputs
Y1, Y2
Outputs
17, 18, 27, 28, 37, 38, 47, 48
Positive driven NO contacts for
release circuit
45, 46
Positive guided indicator output
55, 56
Positive guided feedback circuit
Function diagram
M10115
tv
tv
37-38
55-56
27-28
45-46
17-18
Y2
Y1
A1/A2
U
UN
ORIGINAL
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.
Содержание LG 7927
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