What it is and what it does on the panel
The Omron E3JMDS70M4TUS is a diffuse-reflective photoelectric sensor in the E3JM multi-voltage line, with an infrared emitter, 700 mm maximum sensing distance, and an electromechanical relay output wired through a terminal block on a right-angle rectangular plastic body rated IP66. It runs directly from a 12-240V AC or 12-240V DC supply, the multi-voltage feature of the E3JM series for retrofit and mixed-voltage panels. Diffuse sensing means no separate reflector on the far side; the sensor detects light returning from the target itself, which simplifies mounting on conveyors, bin-level stations, and small-parts presence checks.
Ratings that actually decide the fit
The 700 mm maximum sensing distance is specified against a 700 mm diameter opaque object — a substantial target envelope, not a thin trip wire — so the sensor is sized for larger objects passing the beam, not for small parts or transparent media. Output is an electromechanical relay with a 30 ms response time and a listed switching frequency of 5/6 Hz, which is the load that the relay contacts can cycle at continuously; use a slave relay or a solid-state interface if the application calls for faster cycling or for switching DC contactor coils directly. Operating range is -13 °F to 131 °F, which covers unheated panels and most outdoor enclosures but stops short of cold-storage and foundry zones. The sensor carries UL Listed and CSA approvals and ships in a single-unit sell UOM, with light/dark-on selectable switching and a panel-side indicator included for commissioning visibility.
Mounting, wiring, and panel-side handling
Housing footprint is 25 mm wide by 80 mm tall by 55 mm deep in a right-angle rectangular body, and the supply and load terminate on a built-in terminal block rather than a pre-wired cable, so the wireman brings conductors straight in and lands them on the screw or cage terminals inside the housing. The IP66 rating suits washdown-adjacent and outdoor mounting as long as the supplied cable gland is torqued and the lid is seated; terminal-block entry is the most common leak path on this style of sensor if the installer substitutes a smaller gland. Multi-voltage 12-240V AC and 12-240V DC input lets one SKU serve different cabinet rails, simplifying the spares package for commissioning.
Lifecycle and sourcing posture
Lifecycle stage for the E3JMDS70M4TUS is reported as mature, which frames it as a long-running catalog line rather than a new release; the right move for the project buyer is to lock the BOM to the order code, hold a small startup-spares allocation, and quote to order through the distributor desk for any volume above the stocked quantity.
Compliance and approvals on the listing
Certifications visible on the spec line are UL Listed and CSA, covering the North American panel-builder envelope; for any additional regional or material compliance ask (RoHS, REACH, CE), the documentation packet is a separate request against the order code.