Degson DSR-K72 Safety Relay | 2NO+2NC | DO Signal Input | Loop Supply | PLe Cat.4 | SIL3

Degson DSR-K72 Safety Relay – 2NO+2NC | DO Signal Input | Loop Power Supply | PLe Cat.4 | SILCL3

The DSR-K72 belongs to the DSR-K70 sub-series, distinguished by its digital output (DO) signal input and loop power supply (20V–32V DC, typ. 24V). Unlike the DSR-K1x and K3x series which accept E-stop or safety gate inputs, the K72 is designed for integration with safety controllers and PLCs providing a DO signal output. Its higher rated insulation voltage of 650V AC makes it suited for more demanding electrical environments.

DSR-K Series Sub-Series Overview:

• DSR-K1x (K11–K14): E-stop / Safety gate / PNP light curtain inputs, standalone power supply
• DSR-K3x (K31–K32): Timer/delay outputs, E-stop / Safety gate inputs, 24V DC standalone
• DSR-K7x (K72 ← This model): DO signal input, loop power supply, higher insulation rating

Input

• Current consumption: ≤ 90mA
• Test pulse width: ≤ 3ms
• Test pulse period: 100ms
• Cable resistance: ≤ 15Ω
• Input devices: Safety switch, DO signal

Output

• Signal type: 2NO + 2NC
• Contact type: Forced guided
• Contact material: AgSnO2+0.2μmAu
• Contact loading: AC-15: 5A/230V, DC-13: 5A/24V
• Contact fuse protection: 10A gL/gG (NO); 6A gL/gG (NC)

Times

• Switch-on: ≤ 200ms
• Release: ≤ 50ms
• Switching frequency: ≤ 4Hz

Environmental

• EMC: IEC/EN60947, IEC61326-3-1, IEC/EN61000-6-2, IEC/EN61000-6-4
• Rated insulation voltage: 650V AC
• Rated impulse voltage: 6000V (1.2/50μs)
• Dielectric strength: 1500V AC, 1min
• Clearance and creepage: IEC60947-1
• Vibration: 10Hz – 55Hz, 0.35mm
• Overvoltage category: III
• Pollution degree: 2
• Protection type: IP20
• Ambient temperature: -20°C ~ +60°C
• Storage temperature: -40°C ~ +80°C
• Relative humidity: 10%RH ~ 90%RH (40°C)
• Atmosphere pressure: 80kPa – 106kPa
• Operating altitude: ≤ 2000m

Mechanical

• Mechanical life: 10,000,000 cycles
• Connect type: Screw terminal
• Weight: 180g

Safety Values (ISO 13849)

• Performance level: PLe
• Category: Cat.4
• DTI: ISO13849
• PTI: 20 Years / ISO13849
• DC: 99% / ISO13849
• MTTF: 164 Years / ISO13849
• CCF: 68 / ISO13849
• SIL: SIL3 / IEC61508

Safety Standards (IEC 62061)

• SIL CL: SILCL3 / IEC62061
• HFT: 1 / IEC62061
• SFF: ≥99% / IEC62061
• DC (AVG/PTI ≥ 20 years): IEC62061
• PFH: IEC62061
• Stop Category: 0 / IEC60204

Power Supply

• Voltage range: 20V–32V DC (typ. 24V)
• Power supply type: Loop supply
• Power dissipation: ≤ 2.2W / 24V DC