Menu

Omron D4N-112G safety limit switch — front view showing the compact 31 × 73 × 45 mm plastic housing with the adjustable roller lever at the top and the Pg13.5 conduit entry at the bottom

Omron D4N-112G — Industrial Switch

SKU: D4N-112G

USD 14.00

Compact plastic-body safety limit switch, Pg13.5 conduit, 1NC/1NO snap-action contacts, adjustable roller lever (form-lock, metal lever, resin roller). IP67, TÜV-certified direct opening, EN ISO 14119, 15M mechanical ops, 20 N direct opening force.

1-Year Warranty Full manufacturer warranty
Global Shipping Worldwide delivery available
Genuine Omron 100% authentic product
Ready to Ship Usually ships within 24h
In Stock

This item is available for immediate shipment from our warehouse.

Request Quote

Contact for pricing, bulk discounts, and shipping

Product Overview

The D4N-112G is a compact plastic-body safety limit switch from Omron's D4N family — the de-facto standard for safety door interlocks, machine guards, and position-confirmation applications on packaging machines, robotic cells, and conveyor systems. The switch carries a 1NC/1NO snap-action contact set with one normally-closed and one normally-open contact in a single-pole double-throw configuration, both rated for 10 A at 250 VAC (resistive) with a minimum applicable load of 1 mA at 5 VDC. The actuator is an adjustable roller lever with form-lock mounting — the metal lever pivots on a resin roller, and the lever position can be adjusted in 15° increments through 360° to match the cam or guard profile.

Where the D4N-112G sits in the D4N safety limit switch family

The D4N family splits along three axes: conduit size (1 = Pg13.5, 2 = G1/2, 3 = 1/2-14NPT, 4 = M20, 9 = M12 connector), built-in switch (1 = 1NC/1NO snap, 2 = 2NC snap, A = 1NC/1NO slow, B = 2NC slow, C = 2NC/1NO slow, D = 3NC slow, E = 1NC/1NO MBB slow, F = 2NC/1NO MBB slow), and actuator (0 = pin plunger, 1 = roller plunger, 2 = adjustable roller lever, 3 = one-way roller lever, 4 = cable pull, 5 = long roller lever, 6 = rod lever).

Direct opening, IP67, and the safety-rated contact mechanics

Three mechanical features separate the D4N-112G from a generic limit switch. First, direct opening: the NC contact is mechanically linked to the actuator via a positive-drive cam, so when the actuator is forced past the direct opening travel (50° for rotary actuators like the lever, or 2.4 mm for pin plungers), the NC contact opens even if the spring or contact carrier has failed. This is required by EN ISO 14119 (interlocking devices) for all safety functions above Cat 1 / PL c, and certified by TÜV SÜD for the D4N family.

Safety wiring and use with safety relay modules

The D4N-112G's 1NC/1NO snap-action contact set is wired as a typical safety door interlock: connect the NC contact (terminals 1-2) in series with the safety input of a safety relay (G9SB-200-B AC-DC24V, G9SE-201, G9SP-N20S) or a safety controller (NX-SL5500, G9SP). When the guard is closed, the NC contact is closed and the safety relay is energised; when the guard opens, the NC contact opens (direct opening, guaranteed 20 N force) and the safety relay drops out, stopping the machine.

Key Features

  • Compact plastic-body safety limit switch
  • Pg13.5 conduit entry — G1/2 sibling D4N-212G and M20 sibling D4N-412G available
  • 1NC/1NO snap-action contact configuration
  • Adjustable roller lever actuator, form-lock
  • Direct opening mechanism
  • IP67 protection — dust-tight and water-resistant to temporary immersion
  • TÜV SÜD certified EN60947-5-1
  • UL508 / CSA C22.2 No.14, CQC GB/T14048.5
  • SKU: D4N-112G
  • Series: D4N Safety Limit Switch (EN50047 compact)
  • Voltage: 300 VAC

Best-Fit Applications

  • Safety door interlock on a robotic cell enclosure — D4N-112G on the door, NC contact to a G9SE-201 safety relay.
  • Guard position confirmation on a packaging machine — roller lever actuated by the guard cam when closed, opens on guard swing-out
  • End-of-stroke limit on a linear slide where the safety category requires Cat 3 / PL d — D4N-112G on the.
  • Hinge door safety switch on a control cabinet — roller lever depressed when the cabinet door is closed, opens when.

Buying Checklist

  • Pick D4N-112G for plastic-body safety switch with Pg13.5 conduit and adjustable roller lever
  • Pick D4N-212G for G1/2 conduit
  • Pick D4N-412G for M20 conduit
  • Pick D4N-1120 for pin plunger
  • Pick D4N-122G for 2NC snap-action
  • Pick D4N-1A2G for slow-action

Technical Specifications

Model D4N-112G
Series D4N Safety Limit Switch (EN50047 compact)
Type Plastic-body safety limit switch, snap-action
Conduit Size Pg13.5 (1-conduit)
Cable Entry Direction Bottom
Built-in Switch 1NC/1NO snap-action
Actuator Type Adjustable roller lever, form-lock (metal lever, resin roller)
Roller Diameter 17.5 mm diameter × 6.8 mm wide (resin)
Rated Insulation Voltage (Ui) 300 VAC
Rated Open Thermal Current (Ith) 10 A (EN60947-5-1)
Conditional Short-Circuit Current 100 A (EN60947-5-1)
Ambient Temperature -30 to +70 °C (no icing)
Terminal Type M3.5 screw terminals with self-lifting clamps
Dimensions (W × L × D) 31 × 73 × 45 mm
Certifications TÜV SÜD, UL (E76675), CSA, CQC (CCC), CE

FAQ for D4N-112G

What's the difference between D4N-112G and D4N-212G?
The only difference is the conduit thread — D4N-112G (this SKU) has a Pg13.5 conduit entry (European pre-metric standard), D4N-212G has a G1/2 conduit entry (common in Asian and global machines), D4N-412G has an M20 conduit entry (modern European metric), and D4N-912G has an M12 connector (plug-and-play). All four share the same 1NC/1NO snap-action contact set, the same adjustable roller lever actuator, the same IP67 protection, the same direct-opening certification, and the same 15M mechanical operations rating.
Is the D4N-112G suitable for safety door interlocks?
Yes — the D4N-112G is TÜV SÜD-certified to EN60947-5-1 with certified direct opening, which makes it suitable for safety door interlock applications up to Cat 4 / PL e (when used with a suitable safety relay module). The direct opening mechanism ensures the NC contact is mechanically forced open when the guard is opened, even if the contacts have welded from a previous overcurrent event.
What safety relay should I use with the D4N-112G?
For Cat 3 / PL d single-channel safety circuits: the G9SB-200-B AC-DC24V (17.5 mm ultra-slim 2-pole safety relay) or G9SE-201 (2-pole safety relay with EDM feedback). For Cat 4 / PL e dual-channel safety circuits: the G9SA-501 (5-pole safety relay for dual-channel monitoring), G9SB-3012-A (17.5 mm slim 3-pole safety relay with dual channels), or NX-SL5500 Safety Controller in an NX-series EtherCAT I/O system (for larger safety systems with multiple interlocks and E-stops).
What's the difference between snap-action and slow-action in the D4N family?
Snap-action (D4N-112G, D4N-122G, etc.) makes or breaks the contact within 0.1 mm of actuator travel, regardless of the actuator's speed. The snap mechanism provides a positive, instantaneous contact transfer that eliminates contact bounce and is the right choice for most safety applications. Slow-action (D4N-1A2G, D4N-1B2G, D4N-1C2G, D4N-1D2G) is contact-make/contact-break follows the actuator position directly — the contacts make when the actuator reaches the make position and break when it reaches the break position.