The SICK RLY3-EMSS100 is a specialized safety relay module designed specifically for monitoring emergency stop devices and safety switches (e.g., E-stop buttons, safety interlocks, rope pull switches). It provides a reliable interface between these safety devices and machinery controls, ensuring immediate and safe shutdown of equipment when activated. This module is essential for compliance with machinery safety standards and is built for high-reliability applications in industrial automation.
Key Features
Dual-Channel Input for Safety Devices:
Accepts inputs from dual-channel safety switches (e.g., normally closed contacts from E-stop buttons or safety interlocks) with cross-monitoring for faults.
Detects faults such as contact welding, wire breaks, and short circuits.
Safety Relay Outputs:
Provides 1 normally open (NO) and 1 normally closed (NC) safety relay contact (as indicated by "100" in the part number) for flexible control of machinery power circuits.
Enforces safe stop functionality (e.g., safe torque off - STO) by interrupting power to hazardous actuators.
Manual Reset Function:
Requires a manual reset after an emergency stop or safety event to ensure intentional restart of machinery, enhancing operator safety.
Compact DIN Rail Design:
Space-saving form factor for easy integration into control panels.
DIN rail mountable (standard 35 mm rail).
Diagnostic Indicators:
LED status indicators for power (PWR), input status (CH1, CH2), and output status (OUT), facilitating quick troubleshooting and maintenance.
Compliance with Safety Standards:
Meets ISO 13849-1 PL e (Performance Level e) and IEC 61508 SIL 3 (Safety Integrity Level 3), ensuring compliance with global machinery safety directives.
Wide Operating Voltage Range:
Supports 24 V DC supply voltage (with a typical range of 20.4 V to 28.8 V DC), suitable for industrial environments.
Technical Specifications
Parameter Specification
Product Type Safety Relay Module for E-stop/Safety Switches
Input Channels 2 (for dual-channel safety switches)
Output Type 1 NO + 1 NC safety relay contacts (3A @ 250 V AC)
Supply Voltage 24 V DC (±20%)
Safety Level ISO 13849-1 PL e, IEC 61508 SIL 3
Reset Mode Manual reset (required after trip)
Mounting DIN rail (35 mm)
Connection Screw terminals
Operating Temperature -25 °C to +55 °C
Protection Rating IP20 (for enclosure mounting)
Typical Applications
Emergency Stop Systems: Monitoring E-stop buttons for immediate machinery shutdown.