EATON ESR5-NO-21-24VDC Safety Relay Emergency Stop 24V DC 2NO+1NC DIN Rail

The EATON ESR5-NO-21-24VDC is a compact safety relay designed for emergency stop and safety gate monitoring applications. With a control voltage of 24 V DC, it provides reliable safety functions up to PLe/Category 4 according to EN ISO 13849-1 and SILCL 3 per IEC 62061. The relay features 2 normally open (NO) safety contacts and 1 normally closed (NC) auxiliary contact, screw terminals, and DIN rail mounting. Its 22.5 mm width saves space in control cabinets.

Advantages

High safety integrity with PLe and SILCL 3 ratings; automatic or monitored manual reset; fast response time of 20 ms; robust design for industrial environments; easy installation on DIN rail.

Suitable for

• Emergency stop circuits
• Safety gate monitoring
• Machine safety systems
• Industrial automation

Key specifications

• Product Type: Safety Relay
• Control Voltage: 24 V DC
• Safety Contacts: 2 NO
• Auxiliary Contacts: 1 NC
• Safety Category: PLe, Category 4 (EN ISO 13849-1)
• SIL: SILCL 3 (IEC 62061)
• Terminal Type: Screw Terminals
• Mounting: DIN Rail
• Rated Operational Current: 6 A at 24 V DC (DC-13), 4 A at 230 V AC (AC-15)
• Module Width: 22.5 mm
• Operating Temperature: -25 to +60 °C
• Protection Degree: IP20
• Reset Function: Automatic / Monitored Manual
• Response Time: ≤ 20 ms
• Rated Insulation Voltage: 300 V AC
• Rated Impulse Withstand Voltage: 4 kV
• Standards: UL, CSA, CE, TÜV

Recommendations

For optimal safety, ensure proper wiring and configuration according to the manufacturer's instructions. Use in combination with appropriate emergency stop devices and safety sensors.