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Summary of Contents for IFM Electronic GF761S
- Page 1 Original operating instructions Fail-safe inductive sensor GF761S...
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Page 2: Table Of Contents
GF761S Fail-safe inductive sensor Contents Preliminary note ............. -
Page 3: Preliminary Note
Fail-safe inductive sensor GF761S 1 Preliminary note You will find instructions, technical data, approvals, accessories and further information using the QR code on the device / packaging or at documentation.ifm.com. 1.1 Manufacturer’s address ifm electronic gmbh Friedrichstraße 1 45128 Essen Germany www.ifm.com info@ifm.com 1.2 Symbols used... -
Page 4: Type Label
GF761S Fail-safe inductive sensor 1.4 Type label The type label of the device contains the following information: Germany Made in Germany yymm Fig. 1: Type label Article number Year and month of manufacture Serial number, 6-digit or 12-digit Production status of the device 1.5 Applicable documents... -
Page 5: Safety-Related Requirements Regarding The Application
Fail-safe inductive sensor GF761S • The manufacturer assumes no liability or warranty for any consequences caused by tampering with the product or incorrect use by the operator. • Configuration, installation, electrical connection, set-up, operation and maintenance of the product must be carried out by qualified personnel authorised by the machine operator. -
Page 6: Items Supplied
GF761S Fail-safe inductive sensor 3 Items supplied • 1 fail-safe inductive sensor • 2 fixing nuts If one of the above-mentioned components is missing or damaged, please contact one of the ifm branch offices. Original operating instructions in printed form are available free of charge on request. -
Page 7: Frontal Approach
Fail-safe inductive sensor GF761S 5.1 Frontal approach 5.1.1 Enable zone (ON zone) The enable zone is the area between the sensing face of the device and the enable distance s The outputs OSSD1 and OSSD2 are enabled as soon as the target (1) is in the enable zone (2) (s <... -
Page 8: Switch-Off Zone (Off Zone)
GF761S Fail-safe inductive sensor 5.1.2 Switch-off zone (OFF zone) The switch-off zone is the range greater than the safe switch-off distance s The safe switch-off distance s is the distance between the target and the sensing face at which the outputs OSSD1 and OSSD2 are switched off. -
Page 9: Transition Zone
Fail-safe inductive sensor GF761S 5.1.3 Transition zone The transition zone is the inadmissible zone between the enable distance s and the safe switch-off distance s If the target is moved from the switch-off zone (6) into the enable zone (2), the outputs OSSD1 and OSSD2 switch on in the transition zone (4). -
Page 10: Lateral Approach
GF761S Fail-safe inductive sensor 5.2 Lateral approach 5.2.1 Enable zone (ON zone) The enable zone for lateral approach depends on the degree of coverage of the sensing face of the device. If the target (1) is moved out of the switch-off zone (6) towards the device during lateral approach (from the left in the example), the outputs OSSD1 and OSSD2 switch on in the transition zone (4). -
Page 11: Switch-Off Zone (Off Zone)
Fail-safe inductive sensor GF761S 5.2.2 Switch-off zone (OFF zone) The switch-off zone for lateral approach depends on the degree of coverage of the sensing face of the device. If the target (1) is moved out of the enable zone (2) during lateral approach (from the left), the outputs OSSD1 and OSSD2 switch off in the transition zone (4). -
Page 12: Transition Zone
GF761S Fail-safe inductive sensor 5.2.3 Transition zone The transition zone for lateral approach is the inadmissible zone depending on the degree of coverage of the sensing face up to the safe switch-off distance s The outputs OSSD1 and OSSD2 switch on or off in the transition zone (4). -
Page 13: Sensing Range Reduction / Increase
Fail-safe inductive sensor GF761S 5.3 Sensing range reduction / increase Installation in different materials has an effect on the sensing range of the device. WARNING Deviating installation conditions w Failure of the safety-related sub-function of the device. w The safe switch-off distance s... -
Page 14: Influence Of The Target Size
GF761S Fail-safe inductive sensor Fig. 9: Device mounted in mounting wall with variable wall thickness. Fig. 10: Device mounted on bracket or mounting wall with one fixing nut. 5.4 Influence of the target size The surface of the target has an influence on the sensing range as shown in figure 11. -
Page 15: Mounting
Fail-safe inductive sensor GF761S 6 Mounting The device can be flush mounted according to IEC 60947-5-2, type I1A12AP2. u Ensure that the device and the target cannot come loose. u Tighten the supplied fastening nuts to a maximum tightening torque of ≤ 15 Nm. -
Page 16: Installation Conditions
GF761S Fail-safe inductive sensor 6.2 Installation conditions Fig. 12: Installation conditions (dimensions in mm) 1: Distance between sensing face and surrounding material a: 18 2: Distance when installing several devices b: 36 3: Distance from sensing face to sensing face c: 20 7 Electrical connection... -
Page 17: Operation
Fail-safe inductive sensor GF761S u Connect and monitor both outputs (OSSD1 and OSSD2). WARNING Overvoltage, voltage interruption or undervoltage w If the device is supplied with operating voltage again after an overvoltage (Ò data sheet), a voltage interruption or an undervoltage, it automatically resumes operation after the power-on delay time. -
Page 18: Response Times
GF761S Fail-safe inductive sensor 8.2 Response times High OSSD1 Δt Δt High OSSD2 Fig. 14: Sequence of test pulses and discrepancy time of the outputs Typical turn-off time t ≤ 20 ms Response time to a request of the safety-related sub-function. The target is further away from the sensing face than the safe switch-off distance s Turn-on time t ≤... -
Page 19: Troubleshooting
Fail-safe inductive sensor GF761S 9 Troubleshooting Error Possible cause Recommended action u Switch on the supply voltage. No LED display. No voltage supply. u Remove cross fault. The device does not switch, The device was brought into the safe state (logic “0”).
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