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Siemens 3LD9280-5D Auxiliary Switch (1NO+1NC) for 3LD2 Switches

Siemens 3LD9280-5D auxiliary switch, 1NO+1NC, for 3LD2 switches.

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ManufacturerSiemens

Part number3LD9280-5D

Type Auxiliary switch

Contacts 1 NO + 1 NC

Action Leading, 20-150ms

Mounting Four-hole front mounting

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1 Normally Open + 1 Normally Closed contact Leading action timing (20-150ms) Enables remote status monitoring Designed for 3LD2 switches Front mounting installation

Product description

The Siemens 3LD9280-5D is an auxiliary switch unit featuring one Normally Open (NO) and one Normally Closed (NC) contact. It has a leading action timing of 20-150ms and is designed for four-hole front mounting. This accessory is intended for use with Siemens 3LD2 main and emergency off switches, as well as repair and maintenance switches with EMC plates, across a current range of 16 A to 125 A.

Auxiliary switches like the 3LD9280-5D are vital for signaling the status of the main switch (e.g., ON, OFF, or tripped) to control systems or indicate positions remotely. They are commonly found in industrial automation, building management systems, and safety interlocks where monitoring switch states is required.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Siemens 3LD9280-5D auxiliary switch. Ensure your control systems have accurate switch status feedback by sourcing this component from Stanlo.

Technical specifications

Type	Auxiliary switch
Contacts	1 NO + 1 NC
Action	Leading, 20-150ms
Mounting	Four-hole front mounting
For Use With	Siemens 3LD2 main/emergency off switches and repair/maintenance switches with EMC plate
Current Range	16 A - 125 A

Common applications

Industrial control panels

Machine monitoring

Safety interlocking

Building automation systems

Remote signaling

Compatible systems

Siemens 3LD2 main/emergency off switches Siemens 3LD2 repair/maintenance switches with EMC plate

Also known as

Siemens 3LD2 auxiliary contact 3LD9280-5D switch Siemens 1NO 1NC auxiliary

Replaces / compatible with

This auxiliary switch is an accessory for Siemens 3LD2 series switches and does not replace another part but adds functionality.

Technical note

Expert tip

The leading action timing of 20-150ms is important for applications requiring specific sequence control or interlocking based on the main switch's state.

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Frequently asked questions

What is the contact configuration and timing for the Siemens 3LD9280-5D auxiliary switch?

The Siemens 3LD9280-5D auxiliary switch features one Normally Open (NO) and one Normally Closed (NC) contact. It operates with a leading action timing specification of 20-150 milliseconds.