GF711S - Inductive sensor IFM - Free user manual and instructions
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| Product type | Safety inductive sensor |
| Brand | IFM |
| Model | GF711S |
| Dimensions (thread) | M12 x 1 |
| Overall length | 70 mm |
| Weight | 0.116 kg |
| Housing material | Stainless steel (1.4404 / 316L), PBT |
| Supply voltage | 24 V DC (19.2 … 30 V DC) |
| Power consumption | < 20 mA |
| Sensing range | 0.5 … 4 mm (target FE360) |
| Safe switching distance (s_ar) | > 6 mm |
| Outputs | 2 x OSSD (A1 and A2), PNP |
| Max. output current | 100 mA |
| Response time (switch-off) | ≤ 1 ms |
| Response time (switch-on) | ≤ 1 ms |
| Safety level | SIL 2 / SILcl 2, PL d (category 2) |
| Protection rating | IP65 / IP67 |
| Ambient temperature | -25 … 70 °C (up to 87600 h) / 10 … 40 °C (up to 175200 h) |
| Electrical connection | M12 connector, gold-plated contacts |
| LED display | Yellow LED (signal), green LED (power) |
| Maintenance | No maintenance required under normal operation |
| Repair | Repair only by manufacturer |
| Supplied accessories | 2 M12 mounting nuts, operating instructions |
Frequently Asked Questions - GF711S IFM
What is the required supply voltage for the GF711S sensor?
The supply voltage is 24 V DC (permissible range: 19.2 to 30 V DC, with 5% residual ripple). In case of a single fault, the voltage must not exceed 40 V DC.
How to correctly mount the GF711S inductive sensor?
The sensor is non-flush according to IEC 60947-5-2. It must be mounted with a tightening torque ≤ 7 Nm for the mounting nuts. Observe the mounting distances indicated in the instructions (see figures 1 to 3). Flush mounting is prohibited as it may increase the sensing range up to output switching (OSSD).
What do the LEDs on the sensor mean?
The sensor has two LEDs: a green LED (Power) indicates the presence of supply voltage; a yellow LED (Signal) indicates the output status. The combinations (on, off, flashing) provide information about the operating state (sensing range, faults, etc.). See the table in section 8.3 of the instructions.
What are the environmental conditions of use?
The sensor can operate in a temperature range of -25 to 70 °C (operating time ≤ 87600 h) or 10 to 40 °C (≤ 175200 h). It withstands relative humidity of 5 to 95% (non-condensing) and is protected to IP65 / IP67. Maximum altitude is 2000 m. Ionizing radiation is not permitted.
How to test proper functioning after installation?
After installation, maintenance or repair of the system, a complete functional test must be performed. Check that the outputs (OSSD) switch correctly in the presence and absence of the metal target in the sensing range. Observe the safety instructions and applicable standards.
What to do in case of a fault (sensor does not switch, LED flashing)?
If the Power LED flashes, it indicates undervoltage or overvoltage: correct the supply voltage (19.2...30 V DC). If the outputs remain deactivated, there may be a short circuit between outputs A1 and A2, or between A2 and the supply. Eliminate the short circuit. If the fault persists, replace the device.
Can I use this sensor in a safety application?
Yes, the GF711S is a safety inductive sensor certified SIL 2 (IEC 61508) and PL d (EN ISO 13849-1). It is suitable for safety applications up to category 3. Its safety function is activated when the target leaves the sensing range (de-energized state).
What types of metals are detected and what is the sensing range?
The sensor detects all ferrous and non-ferrous metals. The sensing range depends on the material: for example, for FE360 steel it is 0.5 to 4 mm; for stainless steel 304 it is 0 to 3.1 mm; for aluminum AIMg3G22 it is 0 to 1.8 mm. These values are typical with a 12x12x1 mm target at 20 °C.
How to connect the GF711S sensor electrically?
Connection is made via an M12 connector. Pins: 1 = L+ (+24 V DC), 2 = A1 (OSSD output 1), 3 = L- (GND), 4 = A2 (OSSD output 2). Follow the wiring diagram in the instructions. Disconnect the installation from power before any intervention.
What is the service life (Mission Time) of the sensor?
The operating time (Mission Time) is 175200 hours (20 years) under specified conditions. The safety-related reliability (PFHd) is 1.0E-07 / hour.
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