B-Line E50BT3S E50 Heavy Duty Plug-In Limit Switch

Yes. The E50BT3S carries NEMA 1, 3, 3S, 4, 4X, 6, 6P, 13 and IP67 environmental ratings, so it handles hosedown, dust, rain and temporary submersion. The die cast zinc enclosure backs that up in corrosive or wet duty. Note this is a cabled unit, not a conduit-entry head, so the 8 ft cable exit has to be routed and sealed to keep the rating intact.

The contact rating is 10A at 240Vac and 1A at 250Vdc, so a 240V starter coil is well inside it. It will also work on a low-voltage DC PLC input, but at millamp-level DC loads you are down at the bottom of the contact's range, so keep a wetting current in mind. Maximum current is 10A AC and 1A DC.

Four. The contact block is 2NO-2NC, which gives you two normally open and two normally closed circuits from a single actuation, enough to stop a drive and signal a controller at the same time without adding a second switch to the machine.

It's a top push roller. The roller sits on the top of the switch body and is driven straight down, so the moving part, cam or carriage has to travel over the switch and depress it vertically. If your target comes at it from the side, a lever or rotary head style operator is the right choice instead, not this one.

Repeat accuracy is within 0.002, which is tight enough for positional limit and stop duty on a machine slide or hoist, not just crude end-of-travel tripping.

The rated operating range is 14 to 221 degrees F (-10 to 105 degrees C). That covers most oven surrounds, dryers and hot process areas, but it stops at 14 degrees F, so a true low-temperature freezer room below that is outside the rating and you need a switch specified for cold duty.

It comes prewired with an 8 ft (2.5 m) cable, so there's no conduit hub to pipe into and no field wiring inside the head. Plan the mounting location within that 8 ft run of your junction box or panel entry, or add a local box to extend from.

Published dimensions are 5.01 in height, 1.78 in width and 1.54 in length, and it weighs 2.1 lb. It's a heavy duty die cast body, so allow for a rigid bracket rather than sheet metal standoff, and leave clearance above the unit for the roller to be depressed through its travel.

Order it as B-Line E50BT3S, an E50 series heavy duty plug-in limit switch with a top push roller operator and 2NO-2NC contacts. There's one configuration, so nothing further to specify on the order.