IFM Efector 100 GG712S User manual

Original operating instructions
Fail-safe inductive sensor
GG712S
704229 / 01 06 / 2010
UK

2
Contents
1 Preliminary note ���������������������������������������������������������������������������������������������������3
1�1 Explanation of symbols ����������������������������������������������������������������������������������3
2 Safety instructions �����������������������������������������������������������������������������������������������4
2�1 Safety-related requirements regarding the application ����������������������������������4
3 Items supplied������������������������������������������������������������������������������������������������������5
4 Functions and features ����������������������������������������������������������������������������������������5
5 Functions �������������������������������������������������������������������������������������������������������������6
5�1 Enable zone ���������������������������������������������������������������������������������������������������6
6 Installation������������������������������������������������������������������������������������������������������������7
7 Electrical connection ��������������������������������������������������������������������������������������������8
7�1 Operation as 4-wire unit ��������������������������������������������������������������������������������8
7�2 Operation as 3-wire unit ��������������������������������������������������������������������������������8
8 Operation �������������������������������������������������������������������������������������������������������������9
8�1 Switching status of the outputs ����������������������������������������������������������������������9
8�1�1 The safe state ���������������������������������������������������������������������������������������9
8�1�2 The switched state ��������������������������������������������������������������������������������9
8�1�3 Output data �������������������������������������������������������������������������������������������9
8�1�4 Cross faults �������������������������������������������������������������������������������������������9
8�2 Response times �������������������������������������������������������������������������������������������10
8�3 LED display �������������������������������������������������������������������������������������������������10
9 Scale drawing ���������������������������������������������������������������������������������������������������� 11
10 Technical data �������������������������������������������������������������������������������������������������� 11
11 Troubleshooting �����������������������������������������������������������������������������������������������14
12 Maintenance, repair, disposal ��������������������������������������������������������������������������14
13 Approvals/standards ����������������������������������������������������������������������������������������15
14 Terms and abbreviations ����������������������������������������������������������������������������������15

3
UK
1 Preliminary note
The instructions are part of the unit� They are intended for authorised persons
according to the EMC and Low Voltage Directive and safety regulations�
The instructions contain information about the correct handling of the product�
Read the instructions before use to familiarise yourself with operating conditions,
installation and operation�
Adhere to the safety instructions�
1.1 Explanation of symbols
►
Request for action
LED on
LED off
LED flashes
LED flashes quickly
Important note

4
2 Safety instructions
• Follow the operating instructions�
• Improper use may result in malfunctions of the unit� This can lead to personal
injury and/or damage to property during operation of the machine� For this
reason note all remarks on installation and handling given in these instructions�
Also adhere to the safety instructions for the operation of the whole installation�
• In case of non-observance of notes or standards, specially when tampering
with and/or modifying the unit, any liability and warranty is excluded�
• The unit must be installed, connected and put into operation by a qualified
electrician trained in safety technology�
• The applicable technical standards for the corresponding application must be
complied with�
• For installation the requirements according to EN 60204 must be observed�
• In case of malfunction of the unit please contact the manufacturer� Tampering
with the unit is not allowed�
• Disconnect the unit externally before handling it� Also disconnect any
independently supplied relay load circuits�
• After setup the system has to be subjected to a complete function check�
• Use the unit only in specified environmental conditions (→ 10 Technical data)�
In case of special operating conditions please contact the manufacturer�
• Use only as described below (→ 4)�
2.1 Safety-related requirements regarding the application
It must be ensured that the safety requirements of the respective application
correspond to the requirements stated in these instructions�
Observe the following requirements:
► Take measures to avoid metallic objects being placed on the sensing face
intentionally or unintentionally�
► Adhere to EN 1088 for interlocking devices associated with guards�
► Adhere to the specified operating conditions (→ 10 Technical data)� Use of
the sensor in the vicinity of chemical and biological media as well as ionising
radiation is not permitted�

5
UK
► Adhere to the principle of normally closed operation for all external safety
circuits connected to the system�
► In case of faults within the fail-safe sensor which result in the defined safe
state: take measures to maintain the safe state when the complete control
system continues to be operated�
► Replace damaged units�
3 Items supplied
1 fail-safe sensor GG712S with 2 mounting nuts M18,
1 operating instructions GG712S, ident no� 704229�
If one of the above-mentioned components is missing or damaged, please contact
one of the ifm branch offices�
4 Functions and features
The fail-safe inductive sensor GG712S detects metal without contact�
Safety function SF: The safe state (output stage switched off; logic "0") is achieved
when undamping greater than or equal to the safe switch-off distance sar (→ 10
Technical data)�
Also observe the notes on installation of the sensor (→ 6 Installation)�
The fail-safe sensor conforms to Performance Level d to EN ISO 13849-1 as well
as the requirements SIL 2 to IEC 61508 and fulfils SILcl 2 to IEC 62061�
The unit corresponds to the classification I1A18SP2 to IEC 60947-5-2 for flush
installation (→ 6 Installation)�
The fail-safe inductive sensor has been certified by TÜVNord�

6
5 Functions
fail-safe sensor
close zone
enable zone
safe switch-off distance sar
damping element
Yellow signal LED: switching status
Green power LED: operating voltage
5.1 Enable zone
The outputs (OSSD) are only enabled when a damping target is present in the
enable zone� Outside this enable zone the outputs remain switched off�
If damped with a standard target plate of 18 x 18 x 1 mm made of FE360 (= mild
steel) and flush installation to IEC 60947-5-2 the enable zone is in the range of
≤ 1 ��� ≥ 5 mm�
The safe switch-off distance sar is > 7 mm�
The enable zone is different if damping elements which deviate from the standard
target plate in terms of material, form and size are used�
Enable zone for other materials*:
Material Enable zone
stainless steel 0�5���3�5 mm
AIMg3G22 0���2�0 mm
CuZn37 0���2�0 mm
Cu 0���1�5 mm
* Typical values for damping with a reference target plate of 18 x 18 x 1 mm and flush
installation to IEC 60947-5-2 at an ambient temperature of 20°C�

7
UK
Depending on the characteristics of the damping element there may be no
close zone�
6 Installation
The unit can be flush mounted according to IEC 60947-5-2, type I1A18SP2�
► Ensure the unit cannot work loose� Maximum tightening torque: 30 Nm
► Adhere to the installation conditions in accordance with the figures 1 to 3:

8
7 Electrical connection
► Disconnect power� Also disconnect any independently supplied relay load
circuits�
► Supply voltage: connect L+ to pin 1 and L– to pin 3 of the connector�
The nominal voltage is 24 V DC� This voltage may vary between 19�2 V and
30 V incl� 5% residual ripple to EN 61131-2�
In case of a single fault the supply voltage must not exceed a maximum
of 40 V DC� (This requires the safe separation between power supply and
transformer)�
For unit with cULus approval and the scope of validity cULus:
The device shall be supplied from an isolating transformer having a
secondary listed fuse rated either
a) max� 5 amps for voltages 0~20 Vrms (0~28�3 Vp) or
b) 100/Vp for voltages of 20~30 Vrms (28�3~42�4 Vp)�
7.1 Operation as 4-wire unit
Safety-related logic unit
7.2 Operation as 3-wire unit
Safety-related logic unit

9
UK
In case of operation as 3-wire unit only A2 must be used as output
(OSSD). Otherwise the safety function of the sensor will be impaired or
prevented.
► Connect output A1 to supply voltage�
► Make absolutely sure to exclude cross faults and short circuits between the
supply voltage and output A2 by means of appropriate installation!
The indicated values regarding the safety function (→ 10 Technical data) remain
unchanged�
8 Operation
8.1 Switching status of the outputs
8.1.1 The safe state
The safe state is when at least one of the outputs A1 and A2 (OSSD) is switched
off (zero-current state: logic "0")�
If one of the outputs A1 and A2 is switched off, the subsequent safety-related logic
unit must bring the complete system into the state defined as safe�
8.1.2 The switched state
If the damping element is in the enable zone and if there is no sensor error, both
outputs A1 and A2 (OSSD) are enabled (logic "1")�
8.1.3 Output data
The output data are based on the input data to EN 61131-2 type 1 or 2:
logic "1" ≥ 15 V 2���15 mA
≥ 11 V 15���30 mA
logic "0" ≤ 5 V leakage current 0�2 mA
8.1.4 Cross faults
• A cross fault between both outputs (A1 and A2) is detected by the fail-safe
sensor and leads to switching off the outputs (OSSD) at the next safety
request� The outputs A1 and A2 remain switched off until the error has been
removed�
• A cross fault between one of the two outputs (A1 or A2) and the supply voltage
leads to switching off the other output (A2 or A1) in case of a safety request�

10
8.2 Response times
Response time on safety request
(removal from the enable zone)
≤ 1 ms
Response time when approaching the enable zone
(enable time)
≤ 1 ms
Risk time / response time for safety-related faults ≤ 20 ms
Simultaneity of switching on and off of the outputs in case of a safety
request
≤ 1 ms
Duration of switch-off test pulses ≤ 1 ms
8.3 LED display
LED
status
Operating status Outputs A1
(OSSD)
A2
(OSSD)
Signal
Power
no voltage supply both outputs switched off 0 0
Signal
Power
undervoltage 1
0
0
0
Signal
Power
overvoltage both outputs switched off 0 0
Signal
Power
damping element at safe
switch-off distance from the
sensor (≥ 7 mm)
both outputs switched off 0 0
Signal
Power
sensor error
(→ 11 Troubleshooting)
one output or both
outputs switched off
0
1
0
1
0
0
Signal
Power
damping element in the
enable zone
both outputs enabled 1 1
damping element in the
close zone
output A2 is switched off 1 0
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