Keyence GS-73PC Safety Interlock Switch

The Keyence GS-73PC is a rugged, high-performance safety interlock switch, designed for hazardous zone protection and machine safeguarding.

With power-to-lock functionality, high locking force (2,000 N), and TÜV SÜD-certified IP69K protection, this switch is ideal for safety-critical environments in manufacturing, robotics, and automation.

Technical Specifications

Manufacturer: Keyence
Product Series: GS Series
Model: GS73PC
Type: Advanced Function Type Safety Interlock Switch
Lock Type: Power-to-Lock

Locking & Response Time

• Locking Force (Fzh): ≥ 2,000 N
• Lock Alignment Tolerance: ±2 mm (±0.08″)
• Mechanical Life-Span: ≥ 1 million cycles (1 m/s door speed)
• Operation Frequency: 1 Hz (3 Hz in open/close link mode)
• Minimum Door Radius: 250 mm (9.84″)

Response Times:

• Lock → Unlock: 320 ms
• Unlock → Lock: 220 ms (430 ms if simultaneous with actuator detection)

Control Output (OSSD Output)

• Output Type: 2 Transistor Outputs
• Max Load Current: 150 mA
• Residual Voltage (ON): ≤ 2.5 V (5 m cable)
• OFF State Voltage: ≤ 2.0 V (5 m cable)
• Leakage Current: ≤ 0.5 mA
• Max Capacitive Load: 2.2 µF
• Load Wiring Resistance: ≤ 2.5 Ω

AUX Output:

• Number of Outputs: 2 (1 in open/close link mode)
• Max Load Current: 50 mA
• Residual Voltage (ON): ≤ 2.5 V

GS-73PC External Inputs & Safety Compliance

External Input Short-Circuit Current:

• Safety Input: 1.5 mA × 2
• Reset/EDM Input: 10 mA × 1
• Lock Control Input: 2.5 mA × 1
• OSSD Operation Switching Input: 2.5 mA × 2 (1 in lock link mode)

Safety Standards Compliance:

• EN/IEC 61508: SIL2 / SIL3
• EN/IEC 62061: SIL CL2 / SIL CL3
• EN ISO 13849-1:2015: PLd / PLe (Cat 2 / Cat 4)
• EN ISO 14119: Type 4
• EN/IEC 60947-5-3
• UL 61010-1 / CSA C22.2 No. 61010-1

Power & Protection Circuits

• Power Supply: 24 VDC ±20% (Class 2, Ripple ≤10%)
• Power Consumption:
  • Normal: 3.4 W
  • Max (During Lock Control): 10.5 W for 0.2 s

Built-In Protection:

• Reverse Current Protection
• Short-Circuit Protection
• Surge Protection (per output)

Environmental Resistance

• IP Ratings:
  • IP65 / IP67 (IEC 60529)
  • IP69K (ISO 20653 – TÜV SÜD Certified)
• NEMA Ratings: Type 3 / 4X / 12 / 13
• Operating Temperature: -20°C to +55°C
• Storage Temperature: -25°C to +70°C (Store ≤ 55°C long term)
• Humidity: 5% to 95% RH (Operating/Storage, Non-Condensing)
• Vibration Resistance: 10–55 Hz, 2.0 mm double amplitude (IEC 60947-5-3)
• Shock Resistance: 30 G, 6 times per axis (X, Y, Z)

Material & Construction

Sensor Main Unit:

• Case: SUS304, PPS, PBT, PAR, PA66, NBR
• Lock: Aluminum Alloy, Zinc Die-Cast (Nickel Chrome Plated)
• Cable: PVC

Actuator:

• Case: PPS, PBT, NBR
• Lock: Aluminum Alloy, SUS303

Weight: Approx. 380 g

Key Features & Benefits

✅ High Locking Force: 2,000 N ensures secure door locking.

✅ Fast & Reliable Locking Mechanism: 220 ms unlock → lock, 320 ms lock → unlock response time.

✅ Cascading Capability: Connect up to 25 units for large-scale machine safety applications.

✅ Rugged & Durable Build: IP69K-rated SUS304 housing for maximum durability in harsh environments.

✅ Certified for Safety Standards: Meets SIL3, PLe, and Category 4 compliance for machine safety.

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