USD 18.26
Heavy-duty safety limit switch with a Ø12.7mm metal top roller plunger. Features 1NC/1NO snap-action contacts, IP67/NEMA 6P rating, and a rugged metal housing for industrial use.
The Omron D4B-4171N is a heavy-duty safety limit switch featuring a top roller plunger actuator with a Ø12.7mm metal roller. It is equipped with snap-action 1NC/1NO contacts and a certified direct opening mechanism on the NC contacts to safely force separation in the event of contact welding. Encased in a rugged metal housing with an M20 conduit entry, it is built for demanding environments, offering IP67 and NEMA 6P sealing. It provides highly reliable mechanical position detection across a wide operating temperature range of -40°C to +80°C.
| Parameter | Value |
|---|---|
| Actuator Type | Top Roller Plunger (Ø12.7mm Metal) [1.1] |
| Contact Configuration | 1NC + 1NO (Snap-Action) |
| Current Rating | 10 A |
| Operating Temperature | -40°C to +80°C |
| Ingress Protection | IP67; NEMA 3, 4, 4X, 6P, 13 |
| Conduit Entry | M20 |
Acts as a primary mechanical interlock switch to confirm that heavy access doors or sliding guards on CNC machinery are fully closed before allowing the machine spindle to engage.
Prevents severe operator injury by reliably cutting off control power. The direct opening mechanism ensures the safety circuit breaks open even if the contacts fuse together due to electrical arcing.
Deployed as an end-of-travel limit switch on industrial hoists and overhead cranes to mechanically detect when the lifting mechanism has reached its maximum safe vertical or horizontal limit.
Provides a fail-safe mechanical hard-stop signal in severe industrial environments. The IP67/NEMA 6P enclosure prevents dust and moisture ingress, while the robust metal housing withstands mechanical shock.
Installed along heavy-duty roller conveyors to mechanically verify the arrival and precise seating of large metal pallets before automated robotic welding or assembly begins.
Offers highly reliable physical detection where optical sensors might fail or fault out due to weld spatter, dust, or bright light. The heavy-duty metal roller plunger easily handles repetitive, high-impact mechanical actuation.
