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3TK2828-1AJ20

The Siemens 3TK2828-1AJ20 is a compact safety relay from the SIRIUS 3TK28 series, designed for machine safety applications. It provides reliable monitoring of safety devices (e.g., emergency stops, safety gates, light curtains) while meeting SIL 3 (IEC 62061) and PL e (ISO 13849-1) safety standards.

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TEL：400-887-3214
Mail：jilineasyyi@outlook.com
Q Q：615739355
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Key Features & Specifications
1. Safety & Compliance
Safety Level: SIL 3 (IEC 62061), PL e (ISO 13849-1)

Standards: IEC 62061, ISO 13849-1, EN 60204-1

Certifications: CE, UL, TÜV

2. Electrical Parameters
Supply Voltage: 24V DC (19.2–28.8V DC)

Current Consumption: ≤100 mA

Safety Outputs:

2 NO (Normally Open) safety contacts

Rated Load: 6A / 250V AC

Input Channels:

Dual-channel monitoring (for safety devices)

Cross-circuit detection (prevents bypassing safety signals)

3. Mechanical & Mounting
Mounting: DIN Rail (35mm)

Terminals: Screw-type, accepts 0.25–2.5 mm² conductors

Protection Degree: IP20

Operating Temperature: -25°C to +60°C

4. Monitoring & Diagnostics
LED Status Indicators:

Power (green)

Safety circuit status (yellow/red)

Reset Modes: Manual or automatic reset (configurable)

Fault Memory: Stores last fault event for troubleshooting

5. Compatibility
Emergency Stop Buttons (dual-channel)

Safety Interlocks & Light Curtains

Compatible with Siemens SIMATIC Safety PLCs

Typical Applications
✔ Machine Safety Systems (presses, robots, conveyors)
✔ Emergency Stop Circuits
✔ Safety Gate Monitoring
✔ Automated Production Lines