Schneider Electric ZBG421E Pushbutton Switch Key Pack of 2

Product Description

The SCHNEIDER ELECTRIC ZBG421E is a replacement key accessory designed for use with Harmony XB4 and Harmony XB5 series pushbutton switches. This keyed insert allows operators to restrict unauthorized actuation of a pushbutton station by requiring a physical key to engage or disengage the switch. It is a direct swap-in component for existing Harmony-series control stations found in industrial and commercial control panels. Electricians and control panel technicians performing maintenance or security upgrades on operator interface devices are the primary installers. Each package contains 2 keys. The part weighs 0.03 pounds, making it a compact, low-profile accessory.

This key is suited for applications where access control at the pushbutton level is required, such as machine control panels, motor control centers, and process equipment stations. It is compatible with Harmony XB4 and Harmony XB5 pushbutton devices commonly found in light industrial, commercial building automation, and manufacturing environments. When a site requires restricted operation of a specific control function, this keyed actuator accessory provides a straightforward mechanical solution without requiring a full switch replacement.

Key Features

• Designed specifically for Harmony XB4 and Harmony XB5 pushbutton series
• Enables keyed access control at the pushbutton station level
• Direct replacement accessory requiring no additional hardware
• Sold as a pack of 2 keys per package
• Lightweight construction at 0.03 pounds per package

Compatibility

Designed for use with Harmony XB4 and Harmony XB5 series pushbutton switches as stated by the manufacturer. Verify the specific actuator head configuration on the existing control station before installation.

Installation Notes

Installation should be performed by a qualified electrician or control systems technician. De-energize and lockout/tagout the control panel in accordance with NFPA 70E procedures before servicing any pushbutton station or operator interface device. Confirm the key profile is compatible with the installed actuator body before inserting. Do not force the key into the actuator; improper fitment may damage the switch mechanism.