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PSS25E PSS2021A

Key Features:
Function: Safety monitoring relay (dual-channel)

Inputs: 2 safety circuits (e.g., E-Stop, light curtains)

Outputs: 2 NO (normally open) safety contacts

Rated Voltage: 24V DC/AC

Safety Standards: EN ISO 13849-1 (PL e), IEC 62061 (SIL 3)

Mounting: DIN rail (35mm)

Applications:
Machine safety systems

Emergency stop circuits

Guard door monitoring

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Eaton PSS25E PSS2021A Safety Relay – Technical Specifications
General Parameters:
Type: Dual-Channel Safety Monitoring Relay

Safety Category: PL e (EN ISO 13849-1), SIL 3 (IEC 62061)

Standards Compliance:

IEC/EN 60204-1, EN 60947-5-1

UL 508, CSA C22.2 No. 14

Electrical Ratings:
Supply Voltage: 24V DC/AC (±10%)

Current Consumption: ≤100 mA

Input Channels:

2 Safety Inputs (Dual-Channel):

Voltage: 0–30V DC/AC

Type: Dry contact or OSSD (PNP) signals

Outputs:

2 Safety Relays (NO Contacts):

Rated Current: 6A (resistive) / 3A (inductive)

Max Switching Voltage: 250V AC/30V DC

Auxiliary Output (1 NO): For fault signaling

Safety & Timing:
Response Time: ≤20 ms

Cross-Fault Detection: Yes (internal monitoring)

Reset Mode: Manual (push-button) or automatic (configurable)

MTTFd (Mean Time to Dangerous Failure): ≥100 years

Mechanical & Environmental:
Mounting: DIN rail (35mm, EN 60715)

Terminals: Screw-type (0.5–2.5 mm²)

Protection Rating: IP20 (front), IP40 (with cover)

Operating Temperature: -25°C to +55°C

Storage Temperature: -40°C to +85°C

Diagnostics & Indicators:
LED Status:

Power (green)

Channel status (yellow)

Fault (red)

Typical Applications:
Emergency stop circuits (E-Stop)

Safety gate/door monitoring

Light curtain/guard interlocking