Omron E2E-X3D1-U — M12 Inductive Sensor, AC/DC 2-Wire
SKU: E2E-X3D1-UUSD 30.00
M12 shielded inductive proximity sensor, 3 mm range, 2-wire AC/DC free-voltage, NO, pre-wired cable.
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Product Overview
The Omron E2E-X3D1-U is an M12 threaded inductive proximity sensor built for panels and machines that only have an AC or free-voltage supply. The 'U' suffix marks the 2-wire AC/DC free-voltage class, so the sensor runs directly from 24-240 VAC or 24-240 VDC without a separate DC sensor supply. It detects a 3 mm standard iron target through the front face, with a shielded body that allows flush mounting in metal. The pre-wired 2 m PVC cable is non-polarity, so it can be wired either way to the load. An operation indicator LED on the back face confirms target detection during commissioning.
When AC/DC free-voltage matters
A standard 3-wire DC sensor needs a regulated 24 VDC supply, which is fine in a control cabinet but a hassle on a 100 VAC machine, an old relay panel, or a remote site with a 240 VAC supply. The E2E-X3D1-U drops directly into those situations: it wires in series with the load, just like a limit switch, and runs on whatever voltage is present between 24 and 240 V AC or DC. It is also a strong retrofit pick for replacing mechanical limit switches where a non-contact sensor is preferred.
Choosing between the E2E family
E2E-X3D1-U is the 2-wire AC/DC free-voltage version in the M12 housing. The 2-wire DC-only sibling in the same M12 barrel is the E2E-X8MD1, which gives 8 mm range on 10-30 VDC for cabinets with a sensor supply. The smaller M8 size is the E2E-X2D1-M1, and the larger M18 size is the E2E-X8B1D18-M1. Pick the E2E-X3D1-U when the panel has only 100/200 VAC or a free-voltage supply; pick the E2E-X8MD1 when a longer range on a regulated 24 VDC rail is the goal.
Before ordering
Confirm the supply is within 24-240 V AC or DC, and that the load current stays between 5 mA and 200 mA. Allow 30% extra sensing distance over the actual target distance because non-magnetic metals reduce the rated range. The 1 kHz response handles most part-counting and position checks; for higher-speed lines, move to a through-beam photoelectric sensor.
Key Features
- M12 threaded shielded barrel, 3 mm sensing range
- 2-wire AC/DC free-voltage, 24-240 VAC/DC
- NO contact, non-polarity wiring
- 5-200 mA load current
- Pre-wired 2 m PVC cable
- Operation indicator LED on the back face
- IP67 protection, nickel-plated brass housing
- SKU: E2E-X3D1-U
- Series: E2E standard cylindrical inductive sensor
- Voltage: 24-240 VAC
Best-Fit Applications
- Direct 100/200 VAC retrofit replacement for mechanical limit switches
- Position detection on conveyor rollers and packaging line guards
- Part-presence checks on a 24 VDC or 100 VAC machine skid
- End-of-travel detection on pneumatic cylinders and rotary dampers
- Iron and steel workpiece detection at machine infeed stations
Buying Checklist
- Choose E2E-X3D1-U when the cabinet only has 24-240 VAC or DC, no DC sensor rail.
- Choose E2E-X3D1-N for a 2-wire DC-only 10-30 VDC sensor at the same range.
- Choose E2E-X3D1-M1 when the panel uses M12 connector cordsets.
- Choose E2E-X5D1-U or E2E-X8MD1-U for a longer 5 mm or 8 mm range.
- Confirm the load current sits between 5 mA and 200 mA.
- Check the supply is within 24-240 V AC or DC, with no polarity on the wires.
Technical Specifications
| Series | E2E standard cylindrical inductive sensor |
|---|---|
| Sensing Distance | 3 mm ±10% (shielded, on iron) |
| Body Size | M12 threaded, shielded |
| Supply Voltage | 24-240 VAC, 24-240 VDC (free-voltage) |
| Wiring | 2-wire AC/DC, non-polarity |
| Output | Normally open (NO) |
| Load Current | 5-200 mA |
| Response Frequency | 1 kHz (DC) / 25 Hz (AC) typical |
| Connection | Pre-wired 2 m PVC cable |
| Operating Temperature | -25 to +70 °C |
| Protection Rating | IP67 (IEC 60529) |
| Housing / Face | Nickel-plated brass, PBT sensing face |
Resources & Downloads
FAQ for E2E-X3D1-U
What is the difference between E2E-X3D1-U and E2E-X3D1-N?
Both are M12, 3 mm shielded, 2-wire NO inductive sensors with a pre-wired 2 m cable. E2E-X3D1-U runs on 24-240 VAC or VDC (free-voltage) and is non-polarity. E2E-X3D1-N is DC-only, 10-30 VDC, with polarity. Pick -U for AC supplies or mixed-voltage panels; pick -N for a regulated 24 VDC sensor rail.
Can the E2E-X3D1-U switch a 100 VAC relay coil?
Yes. The free-voltage sensor is designed to be wired in series with the load, so it can switch a 100 or 200 VAC relay coil, solenoid, or indicator lamp as long as the load current sits between 5 mA and 200 mA. The sensor itself is non-polarity, so the two wires can land on either terminal.
What targets can the E2E-X3D1-U detect?
The 3 mm rating is on mild steel. Non-magnetic metals such as aluminium, brass, or copper reduce the usable range, often to half the rated figure. Stainless steel behaves closer to mild steel depending on the grade. For non-metallic targets, use a capacitive sensor such as the E2K series instead.
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