Surface-mounted automatic alarm switch Elektromet WA-1s (1Z 1R) model 921401

The Elektromet WA-1s surface-mounted automatic alarm switch model 921401 is a compact wall-mounted triggering device with one normally closed and one normally open contact. Designed for integration into alarm and safety systems, this unit provides automatic activation of alarms or controlled circuit interruption when the switching element is operated. The durable enclosure and standard mounting format allow installation in residential, commercial, and light industrial environments where a simple automatic switching interface is required.

Advantages

The device offers a compact footprint and straightforward surface mounting that simplifies retrofits and new installations. Its dual-contact configuration (one normally closed, one normally open) enables flexible wiring to either interrupt circuits or initiate alarm inputs. The switch is built for reliable mechanical operation and is suitable for use where a visible, accessible triggering point is needed. Installation and wiring follow conventional practices for low-voltage alarm system components.

Suitable for

• Automatic alarm initiation in security and fire alarm panels
• Control and interruption of auxiliary circuits in access control systems
• Retrofit installations in homes, offices, and shops requiring a surface-mounted actuator
• Zones where a local, wall-mounted switching point is needed for safety or monitoring

Key specifications

• Contact configuration: one normally closed (NC) and one normally open (NO) contact
• Mounting type: surface/wall-mounted enclosure suitable for standard wiring
• Intended use: automatic alarm switching and circuit triggering for alarm/safety systems
• Construction: compact housing designed for visible, accessible placement
• Compatibility: designed to interface with common low-voltage alarm and control systems

How to use

Mount the unit on a clean, flat wall surface using appropriate fasteners and position it where alarm activation or circuit interruption is required. Connect the NC and NO contacts to the corresponding inputs or circuits in the alarm, control, or monitoring panel following the system wiring diagram and power-off safety procedures. Verify correct operation by testing both the normally closed and normally open circuit behaviors during commissioning and after installation.

Usage recommendations

Use the switch within the voltage and current limits of the connected alarm or control system, and ensure wiring is performed by a qualified technician. Periodically inspect the mounting and electrical connections and test the switching function as part of routine system maintenance.