1 year warranty
The Keyence GS-51PC is a Type 4 safety interlocking switch with integrated guard locking designed to prevent unauthorized access to hazardous machine areas during operation. Operating in power-to-release mode, this device monitors the status of movable safety guards (doors or gates) and controls machine operation accordingly, ensuring operator safety. It features PNP transistor outputs with M12 connector type for industrial connectivity. The switch achieves Performance Level e (PLe), Category 4, and SIL 3 safety ratings per ISO 14119, IEC 60947-5-3, and IEC 61508, making it suitable for high-risk machinery and manufacturing applications. With a minimum locking force of 2000 N and advanced diagnostic capabilities including redundant OSSD outputs, the GS-51PC provides robust safeguarding for industrial automation environments. Cascade functionality allows connection of up to 25 units for extended guard monitoring applications.
Item Details
- Brand Name: Keyence
- Manufacturer: Keyence Corporation
- Item Type Name: Safety Interlock Switch with Guard Lock
- Product Family / Series: GS Series Safety Interlock Switches
- Model Number: GS-51PC
- Lock Type: Power-to-release type
- Device Type: Standard type
- Output Type: PNP
- Connector Type: M12
Product Specifications
- performance_level: PLe (Performance Level e)
- safety_category: Category 4
- sil_rating: SIL 3
- pfh_interlocking: 4.78×10⁻¹⁰ per hour
- locking_force_min: 2000 N
- response_time_lock_to_unlock: 220 ms
- response_time_unlock_to_lock: 220 ms
- alignment_tolerance: ±2 mm
- mechanical_lifespan: 1 million cycles or more (at 1 m/s door speed)
- acceptable_operation_frequency: 1 Hz
- door_radius_min: 250 mm
- max_cascading_units: 25 units
- control_outputs: 2 transistor outputs (OSSD)
- max_load_current: 150 mA
- rated_voltage: 24 V DC ±20%
- residual_voltage_on: 2.5 V max (5 m cable)
- off_state_voltage: 2.0 V max (5 m cable)
- leakage_current: 0.5 mA max
- max_capacitive_load: 2.2 µF
- load_wiring_resistance: 2.5 Ω max
- max_power_consumption_peak: 10.5 W (approx. 0.2 s during lock activation)
- auxiliary_release: Front and back
Additional Details
- Certifications / Approvals: ISO 14119, IEC 60947-5-3, IEC 61508, UL 61010-1, CAN/CSA-C22.2 No. 61010-1, CE, UKCA
- Hardware Fault Tolerance Interlocking: 1
- Hardware Fault Tolerance Lock: 0
- Mission Time: 20 years
- Auxiliary Outputs: AUX outputs available
- Intended Use: Indoor use only
Measurements
- Weight: 380 g
All PLC Direct products come with a 1-year warranty. The warranty is issued by PLC Direct. Warranty coverage commences at the date of purchase. The warranty is for mechanical defects or failures not caused by human factors including but not limited to (a) incorrect installation, (b) operating the unit in sub-optimal conditions or in scenarios not recommended by the manufacturer, (c) poor unit maintenance, etc. The warranty does not cover programming or software related issues.
If the product is eligible for PLC Direct’s warranty coverage and the customer encounters an issue with the product, we will request the item is shipped to us for diagnosis and examination. Regardless of the cause of product issues, the customer will bear responsibility for the cost of shipping the unit to PLC Direct for evaluation. Where the unit was damaged by human factors, we will offer a repair or replace quote; in cases where damage was caused by human factors, the customer is responsible for the cost of shipping the repaired/replaced unit from PLC Direct to the customer. Where the unit was not damaged by human factors but is covered by PLC Direct’s warranty, we will repair or replace the unit at our cost (or, in rare cases, refund you your purchase); in such cases, PLC Direct will bear the cost of shipping the repaired or replaced product back to the customer. It is up to PLC Direct’s discretion whether to repair, replace, or refund the customer in such cases. Diagnoses can take time to complete based on technician availability and the complexity of diagnosis.
In no event shall PLC Direct be liable for any damages except actual damages up to, but not exceeding, the amount paid to us for the product, including we shall not be liable for any consequential or indirect damages or lost profits whether or not advised of same.
PLC Direct offers free shipping worldwide. Product ship from a various warehouses worldwide based on the customer's and the product's location. The estimated delivery date on the product page is PLC Direct's best estimated assuming a US-based shipping destination.
Regardless of where the product is shipping from, PLC Direct covers all duties for US-based shipping destinations. For non-US-based shipping destinations, customers are responsible for duties as appropriate.
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