Wieland SNA 4043K Safety Relay R1.188.1840.0, 230V AC, DIN Rail, 3 Safety Contacts, 1 Auxiliary, Manual Reset

The Wieland SNA 4043K Safety Relay, model R1.188.1840.0, is an advanced industrial safety relay designed for critical control processes. Operating at 230V AC, it provides dependable safety control for applications such as elevators, heaters, and other automation systems that require rigorous compliance with safety standards.

This relay includes three safety contacts and one auxiliary contact, offering superior circuit isolation and redundancy. The manual reset and cross monitoring features enable the relay to satisfy the highest safety categories, including Category 4 and SIL 3 according to EN 62061 and EN ISO 13849-1.

DIN rail mounting and screw terminal blocks make installation straightforward within electrical panels. The relay is rated for 8A contact current and features both IP20 and IP40 ingress protection, ensuring durability in demanding industrial environments. Its operating temperature range spans from -25°C to 65°C to guarantee reliable performance across varied conditions.

Additional capabilities include LED visual status indication, external device monitoring (EDM), and compatibility with both manual and automatic reset circuits. The relay supports one or two-channel wiring, providing flexible integration into control schemes for emergency stops and safety gate monitoring.

All components are housed in a compact form factor, measuring 22.5mm in length, 114mm in width, and 96.5mm in height. Construction materials and design enable secure and repeatable actuation cycles.

Applications include factory automation, elevator safety, heating system protection, and machinery requiring compliance with EN ISO 13849-1, EN 62061, EN 81-1, and EN 50156-1. The relay is suitable for both new installations and retrofit safety upgrades.

Industrial use cases: Manufacturing automation, elevator systems, process safety, panel integration, and machine protection in commercial and industrial facilities. For more advanced safety relay solutions, explore the Safety Relays category from Wieland and other top industrial brands on EnvMart.