IFM IES240 Inductive Proximity Sensor

IES240

IES: IFM Series of shielded inductive sensors with M8 thread

240: Specification code representing M8 flush mount, 3 mm sensing range, PNP Normally Closed, 2-meter PUR straight cable

Full material part number: IEB3003BAPKG/V4A/2M/PUR

2. Core Mechanical Specifications

3. Electrical Performance Parameters

4. Environmental Protection & Weather Resistance
5. Protection Class: IP65 / IP66 / IP67 / IP68 / IP69K (supports high-pressure washing and long-term water immersion)
6. Operating Temperature: -40 ℃ ～ +85 ℃, wide temperature range compatible with hot & cold equipment
7. Anti-interference: Compliant with EN61000 EMC industrial electromagnetic compatibility standards
8. Mechanical Shock Resistance: 100 g shock resistance, 4000 cycles continuous vibration; applicable to mobile machinery
9. Salt Spray Resistance: Class 4 salt spray test; suitable for humid, oily and lubricant-contaminated environments
10. Core Product Advantages
11. Compact short M8 body: Only 27.5 mm long, fits narrow tooling and cylinder limit mounting with no space constraints;
12. Full IP69K protection: Stable operation under machine tool cutting fluid, grease and high-pressure washing conditions;
13. 1500 Hz high-frequency response: Supports high-speed counting, rotational speed measurement and high-speed assembly line detection;
14. PNP NC output: Automatic cable breakage alarm for safety detection (PLC receives signal immediately upon power loss or wire breakage);
15. Oil-resistant PUR cable: Resists cracking and aging on machine tools and hydraulic lubrication equipment;
16. Wide temperature range -40~85 ℃: Universal for cold storage, heat treatment auxiliary machines and outdoor mobile machinery.
17. Wiring Definition (3-core Straight Cable)

Brown BN: DC24V Positive (+10~30V)

Blue BU: DC0V Negative GND

Black BK: PNP signal output (NC, outputs high level when no metal target approaches)

Compatible PLCs: Inovance H1E, Siemens S7, Schneider M-series and other PLCs with DC24V PNP input terminals.

7. Typical Application Scenarios
8. Machine Tools / Machining Centers: Cylinder position confirmation, tool presence detection, material presence check, spindle speed counting;
9. Conveying & Assembly Line Equipment: Workpiece counting, limit blocking, sorting positioning;
10. Hydraulic / Lubrication Equipment: Hydraulic cylinder stroke limit, metal target detection for lubrication pumps;
11. Mobile Construction Machinery: Stroke limit and position feedback for forklifts and agricultural machinery;
12. Packaging / Automated Tooling: Clamp full closure detection, safety check for material presence;
13. High & Low Temperature Equipment: Metal position detection for drying lines and cold storage equipment.
14. Model Comparison & Selection within the Same Series

9. Installation & Operation Prohibitions
10. Flush mounting: Sensor head must be level with the metal bracket surface; avoid excessive recessing;
11. Detection Target Material: Prioritize low-carbon steel over 4 mm thick; sensing distance will degrade with aluminum or copper targets;
12. Wiring Layout: Separate signal cables from power cables of inverters and contactors; use shielded cables under heavy interference;
13. Strictly Forbidden: Directly drive solenoid valves via sensor output (100 mA only supports PLC input; an intermediate relay is required for loads);
14. Temperature Limit: Avoid long-term operation above 90 ℃ and prevent cable exposure to sustained high heat.
15. Quick Troubleshooting Matrix

11. Alternative Model Instructions
12. Same-spec Normally Open replacement: IES241 (PNP NO);
13. M8 plug-in alternative: IEB3003BAPKG/M12 (M12 connector for quick plug & unplug);
14. Extended body alternative: IE5240 (non-shielded, 4 mm sensing range, for ample installation space);
15. Domestic equivalent: M8 shielded 3 mm PNP NC proximity switch (note differences in switching frequency and protection class).

Practical Application Cases of IFM IES240 (M8 Shielded PNP NC 3 mm Inductive Proximity Sensor)

Combined with product features: 27.5 mm short body, IP69K cutting fluid resistance, -40~85 ℃ wide temperature range, 1500 Hz high-speed response, PNP NC cable breakage alarm, 2 m oil-resistant PUR cable, matched with Inovance H1E-1410MR-XP compact PLC. Six real industrial cases covering working pain points, installation schemes, control logic and application effects are listed below.

Case 1: Cylinder Position Detection on CNC Lathes (Machining Industry)

Working Pain Points

Small gang tool lathes have cramped installation space for turret clamping cylinders and silo pusher cylinders (only M8 thread mounting available). Long-term immersion in cutting fluid and metal chips causes frequent jamming of old mechanical limit switches, requiring replacement every 3 months. No alarm for broken cylinder sensor wires, leading to tool collision and scrapped workpieces.

Implementation Scheme

1. Equipment: Small CNC gang tool lathe equipped with Inovance H1E PLC;
2. Installation: IES240 is flush embedded into the metal bracket at the cylinder tail and locked with M8 nuts; the short body avoids interference with turret movement;
3. Wiring: Brown wire for 24V+, blue wire for 0V, black PNP signal wire connected to PLC X input terminals. NC characteristic: PLC receives alarm signal instantly if sensor wire breaks or power fails;
4. Control Logic:

Full cylinder clamping → metal target approaches → signal cuts off → PLC permits spindle startup;

No signal (wire breakage / incomplete clamping) → PLC locks spindle and triggers audible & visual alarm for machine stop.

Application Effects

Withstands IP69K high-pressure washing and long-term cutting fluid immersion without failure. Non-contact design eliminates wear, extending sensor service life to 2 years. Built-in safety warning for wire breakage eliminates tool collision incidents, compatible with 1500 Hz high-speed reciprocating cylinders.

Case 2: Metal Tray Counting on Small Vertical Packaging Machines (Packaging Machinery Industry)

Working Pain Points

Metal feeding trays on powder packaging machines circulate at high speed with 60 reciprocations per minute; heavy dust and lubricant accumulation; limited space only allows short M8 sensors. Precise output counting and automatic stop for material shortage are required.

Implementation Scheme

1. Detection Points: Tray station position confirmation + production counting;
2. Installation: IES240 fixed on the side of the machine frame, stably detects steel trays with its 3 mm sensing distance;
3. PLC Program: H1E PLC uses high-speed input channels to collect 1500 Hz pulses; D registers accumulate shift output, and the built-in RTC clock records daily production volume;
4. Interlock Logic: Three consecutive missing signals trigger material shortage judgment and conveyor stop with alarm.

Application Effects

No missing counts under high-frequency high-speed operation; dust coverage does not affect detection. The 2 m oil-resistant PUR cable resists cracking, replacing longer M12 sensors for more compact cabinet wiring layout.

Case 3: Material Level Limit for Dryers on Injection Molding Auxiliary Machines (Rubber & Plastics Industry)

Working Pain Points

High & low material level detection for plastic pellet dryer hoppers; internal equipment temperature peaks at 82 ℃, while workshop temperature drops to -10 ℃ in winter. Metal level baffles have short stroke and narrow mounting holes.

Implementation Scheme

1. One IES240 installed for high level and one for low level, flush mounted on hopper side walls;
2. Wide temperature range -40~85 ℃ covers all hot & cold operating conditions without extra thermal insulation;
3. PLC Logic: Low-level signal activates suction fan for feeding; high-level signal stops feeding to prevent material overflow.

Application Effects

No signal drift under drastic temperature fluctuations. Shielded structure eliminates electromagnetic interference from surrounding heating contactors for stable jitter-free signals.

Case 4: Workpiece Limit on Small Belt Sorting Lines (Logistics & Conveying Industry)

Working Pain Points

High-speed belt sorting lines for metal express parcels feature metal-heavy frames that cause false triggering of ordinary non-shielded sensors. Position blocking and diverting control are required.

Implementation Scheme

1. IES240 adopts shielded flush mounting and can be fully embedded into metal brackets to eliminate surrounding metal interference;
2. Signals triggered when metal workpiece bases pass by; PLC controls blocking cylinders to extend for sorting diversion;
3. Multiple PLCs networked via RS485 Modbus to collect unified sorting counting data.

Application Effects

Shielded design eliminates false detection from metal frames. NC output triggers automatic line shutdown upon sensor wire breakage to avoid workpiece accumulation and equipment collision damage.

Case 5: Solenoid Valve Limit for Greenhouse Water & Fertilizer Integrated Irrigation Systems (Agriculture & Environmental Protection Industry)

Working Pain Points

Outdoor greenhouse irrigation equipment faces low winter temperatures down to -35 ℃ and high humidity. Small equipment with limited installation space requires stroke detection for metal solenoid valve spools.

Implementation Scheme

1. IES240 installed inside outdoor control cabinets, tolerating low-temperature frost via wide temperature range performance;
2. Detects whether irrigation solenoid spools reset; shuts down water pumps if spools fail to reset to prevent pipeline burst;
3. PLC built-in RTC clock schedules timed irrigation startup & shutdown; sensor feedback verifies correct valve operation sequence.

Application Effects

No malfunction under low temperature; IP67 waterproof & moistureproof performance ensures stable long-term operation in humid outdoor environments.

Case 6: Hydraulic Cylinder Stroke Detection for Small Auxiliary Construction Machinery

Working Pain Points

Hydraulic cylinders of forklifts and small lifting platforms contain built-in metal sensing targets and are fully filled with hydraulic oil. Narrow cylinder heads only fit short M8 sensors with severe oil leakage and contamination.

Implementation Scheme

1. Short 27.5 mm IES240 embedded at cylinder ends; 2 m oil-resistant PUR cable resists hydraulic oil corrosion;
2. Detects fully extended / fully retracted cylinder limit positions; cuts off hydraulic solenoid valve output once limit is reached;
3. NC safety circuit: Hydraulic power supply cuts off immediately upon sensor wire breakage to prevent over-travel cylinder damage.

Application Effects

Oil-resistant cable avoids hardening and cracking. 100 g shock resistance maintains consistent signal transmission under long-term vibration of mobile construction machinery.

Supplementary Matching Selection Logic (Corresponding to IES240 Core Advantages)

1. Narrow-space equipment: Select 27.5 mm short M8 shielded model to replace extended M12 sensors;
2. Safety shutdown requirements: Prioritize PNP NC IES240 with automatic wire breakage alarm, superior to NO IES241;
3. Oily / cutting fluid equipment: IP69K rating + oil-resistant PUR cable, ideal for machine tools and hydraulic equipment;
4. High & low temperature equipment: Universal -40~85 ℃ range for cold storage, drying lines and outdoor agricultural machinery;
5. High-speed reciprocating mechanisms: 1500 Hz switching frequency prevents missed detection on cylinders and high-speed conveyors.