Omron E3ZM-T81 2M Photoelectric Sensor
Omron E3ZM-T81 2M is a PNP through-beam photoelectric sensor designed for object sensing across a specified 15 m distance. The sensing arrangement uses the E3ZM-T81-L emitter and E3ZM-T81-D receiver, with an infrared LED establishing the optical path between them. The PNP output communicates the switching state to compatible PLC and machine-control circuitry, while Light-ON and Dark-ON operation supports different output requirements. The sensor operates from 10 to 30 VDC and includes 2 m pre-wired cables for electrical connection. The emitter and receiver each consume up to 20 mA, while response time is specified at 1 ms maximum. Within the E3ZM Series, the E3ZM-T81 2M provides PNP fixed wiring within the 15 m through-beam sensor range across Omron Sensor Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3ZM-T81 2M |
Omron E3ZM-T81 2M Photoelectric Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Shape | Square type |
| Sensing Distance | 15 m |
| Emitter Number | E3ZM-T81-L 2M |
| Receiver Number | E3ZM-T81-D 2M |
| Power Supply Voltage | 10 to 30 VDC |
| Output Configuration | PNP |
| Connection Method | Pre-wired cable length 2m |
| Current Consumption | Emitter: 20 mA max. Receiver: 20 mA max. |
| Light Source (Wavelength) | Infrared LED |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | 1 ms max. |
| Degree Of Protection | IP67 |
| Material | SUS316L |
| Material Lens | Methacrylate resin |
| Weight | 150 g |
The Omron E3ZM-T81 2M Photoelectric Sensor uses through-beam sensing across a specified 15 m range with separate E3ZM-T81-L emitter and E3ZM-T81-D receiver units. An infrared LED establishes the optical path between them, and interruption of that beam changes the PNP switching state. Both units operate from 10 to 30 VDC and consume up to 20 mA each. Light-ON and Dark-ON operation supports different control requirements, while response time is specified at 1 ms maximum. The supplied table identifies 2 m pre-wired cables for this model, and that value is retained. A square-type arrangement is specified, with SUS316L listed for the body and methacrylate resin for the optical material. The PNP output distinguishes this configuration from the NPN T61 versions.
For an Omron PNP through-beam photoelectric sensor requiring long-range sensing and fixed cable connection, the relevant model is the E3ZM-T81. Its 15 m span supports separation between the transmitting and receiving sides across wider machine openings, while the 2 m cables provide direct connection to compatible control circuitry. The 10 to 30 VDC supply and 20 mA maximum consumption per sensing unit define the supplied electrical requirements. A 1 ms response supports quick switching when an object crosses the beam. The infrared optical arrangement and PNP output make this model distinct from the red LED NPN T61 2M configuration. For a related NPN 15 m through-beam version with 2 m pre-wired cables, see E3ZM-T61 2M.
