SICK ES21 Series Emergency Stop Push Button, 2 NC, IP65

This emergency stop push button provides a compact, non‑illuminated safety command device intended for machine and production‑line shutdown. Designed for use with safety controllers supporting series connection and diagnostics, it employs slow‑action switching with positive‑action normally closed contacts to interrupt control circuits at low voltages. The unit features a polybutylene terephthalate housing and meets multiple approvals for industrial installations.

• 2NC safety contacts provide redundant circuit interruption
• 30V DC rated contact voltage supports low‑voltage control systems
• 100mA contact current suits low‑current safety inputs
• IP65 ingress protection enables use in dusty or wet areas
• Slow action switching element reduces contact bounce during operation

• Suitable for integration with Flexi Loop safety controllers
• Used with safety relay modules in Compact control panels
• Ideal for emergency shutdowns on low‑voltage machinery
• Can be used where non‑illuminated operator interfaces are required
• Suitable for industrial stations requiring recognised approvals

It connects via an M12 plug connector with 4 pins and a PBT coupling nut.

It operates between -25°C and +70°C for standard industrial environments.

The emergency stop push button electrical and mechanical life is specified as 5x10^4 switching cycles.

It carries cULus, EN, UKCA, China RoHS and an EU declaration of conformity.

The housing and coupling nut are MADE from polybutylene terephthalate to provide Durable insulation.