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RLY3-EMSS300

The SICK RLY3-EMSS300 is a compact single-channel safety relay designed specifically for monitoring Electro-Mechanical Safety Switches (EMSS). It provides reliable safety functionality for applications involving guard doors, access gates, and other protective barriers where personnel safety is critical.

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Key Features:

Safety Category: Suitable for applications up to Category 4 per ISO 13849-1 and SIL 3 per IEC 62061 when used in appropriate safety circuits

Input Type: Single-channel monitoring of electro-mechanical safety switches with positive-guided contacts

Output Configuration: Two safe force-guided relays (K1, K2) with NO/NC contacts

Diagnostic Capabilities: Integrated LED status indication (power ON, fault detection)

Mounting: Standard DIN rail mounting (35 mm)

Operating Voltage: 24 V DC (typical industrial voltage)

Safety Standards: Complies with IEC 62061, ISO 13849-1, and other relevant international safety standards

Typical Applications:

Safety gate monitoring on machinery and equipment

Guard door position monitoring

Access control system safety circuits

Emergency stop circuit integration

Safety interlock systems for automated equipment

Technical Specifications:

Contact Configuration: 2 NO + 2 NC (force-guided)

Maximum Switching Current: 6 A

Operating Temperature: -25°C to +55°C

Housing Material: PA (Polyamide)

Connection Type: Screw terminal

Safety Functions:

Safe monitoring of safety switch status

Cross-circuit detection capability

Contact welding detection

Safe shutdown capability upon fault detection

Compatibility:

Designed to work with various EMSS devices including:

Safety interlock switches

Hinge switches

Limit switches with positive-guided mechanism

Safety door monitoring switches