Part overview
The E3JM-R4S4T-US is a retro-reflective photoelectric sensor with a built-in power supply, meaning it handles both AC and DC lines directly — no external power module needed in the cabinet. Output is NPN / DC SSR, switching both sinking DC loads and solid-state outputs. Sensing distance tops out at 4 m with a polarized red LED light source; the L-ON / D-ON selector lets you choose light-on or dark-on operation without rewiring. Connection is via a terminal block, so no prewired pigtail.
How it compares — the E3Z series is not a direct swap
The E3Z-T61K 2M is often checked as a cross-reference, but it won't drop in. The E3Z runs on 12–24 VDC only and uses a through-beam sensing method (separate emitter and receiver), not retro-reflective. That means you'd need a different mounting setup, a different power supply, and a reflector at the target. If you need to replace the E3JM-R4S4T-US with something close in function, look for another retro-reflective sensor with a 4 m range and a built-in power supply that accepts both 24-240 VAC and 12-240 VDC — those are the specs that matter.