Orange Single Pole Keyswitch with Interchangeable Legends | Ks-O-S

The KS-O-S is a latching single-pole keyswitch designed for secure control and override applications within access control, fire safety, smoke ventilation, and building management systems. Featuring a high-visibility orange housing and supplied with a selection of interchangeable legends, the unit can be configured to suit a wide range of operational requirements.

With maintained on/off operation, voltage-free contacts, and IP54-rated protection, the KS-O-S provides a reliable and professional solution for environments where authorised key-operated control is required.

Key Features

• Latching on/off keyswitch operation
• Single Pole Normally Open / Normally Closed contact configuration
• Voltage-free switching contacts
• Key removable in both switch positions
• Supplied keyed alike
• Includes 2 x A126 keys
• Orange housing for high visibility
• Supplied with 10 interchangeable legends
• Easy-clean surface
• Security fixing screws included
• Suitable for flush back box installation
• Ideal for secure override and emergency control functions
• Clear etched 0–1 position markings
• IP54-rated enclosure

Included Legends

• Lockdown
• Emergency
• Emergency Power Off
• Gas Abort
• Gas Shut Off
• Evacuate
• Fire
• Extinguishant Release
• Smoke Vent
• Isolation Switch

Technical Specifications

• Product Type: Latching Keyswitch
• Operation: Maintained On/Off
• Contact Configuration: Single Pole NO/NC
• Contact Type: Voltage-Free
• Contact Ratings:
  • 4A @ 125VAC
  • 2A @ 250VAC
  • 2A @ 12/24VDC
• Key Removal: Both Positions
• Keys Supplied: 2 x A126 Keys
• Protection Rating: IP54
• Operating Temperature: -20°C to +55°C
• Mounting Type: Flush Back Box Compatible
• Position Marking: Etched 0–1
• Security Fixings: Included

Typical Applications

• Access control override systems
• Lockdown controls
• Smoke ventilation systems
• Fire safety installations
• Emergency power isolation
• Gas shut-off controls
• Building management systems
• Commercial and industrial facilities

• Rated IP54 ingress protection