Why Choose the EMAS LK20K23 Slow-Action Limit Switch Contact Block?
The EMAS LK20K23 is a high-performance slow-action replacement contact block featuring one normally closed (1NC) and one normally open (1NO) contact, designed for compatible EMAS industrial limit switches. It provides dependable mechanical position detection and electrical control switching in machinery, automation systems and industrial equipment.
Featuring a 3 A rated operating current at 240 V AC (AC-15), the LK20K23 incorporates a slow-action contact mechanism with a short operating plunger arrangement. Unlike snap-action contacts, slow-action contacts operate progressively in response to actuator movement, making them suitable for applications requiring controlled mechanical switching.
With silver nickel (AgNi) contacts, a minimum mechanical endurance of 10 million operations and compatibility with multiple EMAS limit switch housing series, the LK20K23 provides a practical replacement solution for maintaining industrial limit switch assemblies.
Key Advantages
- 1NC + 1NO contact configuration provides complementary switching functions.
- Slow-action switching mechanism responds progressively to actuator movement.
- 3 A rated operating current at 240 V AC under AC-15 conditions.
- 10 million mechanical operations minimum for long-term industrial reliability.
- 1 million electrical operations minimum under specified conditions.
- Silver nickel (AgNi) contacts support dependable electrical switching.
- Positive-opening NC contact function for compatible mechanically operated limit switch assemblies.
- Compatible with multiple EMAS limit switch housing families.
- Replacement contact block design allows maintenance without replacing an entire compatible limit switch assembly.
- Suitable for industrial automation, position monitoring and machinery control.
Key Features
- Genuine EMAS replacement limit switch contact block.
- Slow-action contact operation.
- One normally closed and one normally open contact.
- Short plunger configuration.
- Positive-opening contact function.
- AC-15 industrial control switching category.
- 300 V rated insulation voltage.
- 2.5 kV rated impulse withstand voltage.
- −25 to +80 °C operating temperature range.
- 1–2.5 mm² conductor connection capacity.
- Compatible with EMAS L1, L2, L3, L5, L51, L52, L53 and L54 limit switch families.
- Designed to meet TS EN 60947-5-1, UL 508 and VDE 0660 requirements.
Slow-Action Switching for Reliable Machinery Position Detection
The EMAS LK20K23 uses a slow-action switching mechanism in which contact movement follows the mechanical displacement of the limit switch actuator. This differs from snap-action mechanisms, which change contact state rapidly once a defined operating point is reached.
The 1NC + 1NO configuration enables two complementary electrical functions within a compatible limit switch assembly. The normally closed contact can be used for an appropriate control or monitoring circuit, while the normally open contact provides an additional position-dependent signal.
The LK20K23 also features a positive-opening normally closed contact arrangement, supporting applications where direct mechanical opening of the NC contact is required. Any safety-related use must be assessed as part of the complete machine control system, including the selected housing, actuator and associated circuitry.
Its replaceable construction is particularly beneficial during industrial maintenance, allowing engineers to restore the electrical contact functionality of a compatible EMAS limit switch without unnecessarily replacing the entire assembly.
Typical Applications
- Industrial limit switch repair and maintenance.
- Machinery travel limit detection.
- Conveyor position monitoring.
- Packaging and production machinery.
- Industrial automation and PLC input circuits.
- Mechanical position indication.
- Machine sequencing and auxiliary interlocking.
- Automated material handling equipment.
- OEM machinery and control equipment.
- Replacement contact assemblies for compatible EMAS limit switches.
