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Siemens 3RT1916-2FK21 OFF Delay Auxiliary Switch Block

Siemens 3RT1916-2FK21 solid-state auxiliary switch block with OFF delay.

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ManufacturerSiemens

Part number3RT1916-2FK21

Type Auxiliary Switch Block

Function OFF Delay

Time Range 0.5-10 s

Voltage 100-127 V AC/DC

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Solid-state design Front mountable OFF delay function Adjustable time range 0.5-10 s 1 NO + 1 NC contacts Wide voltage range 100-127V AC/DC

Product description

The Siemens 3RT1916-2FK21 is a solid-state auxiliary switch block designed for front mounting onto Siemens SIRIUS 3RT2 contactors of size S00. It features an OFF delay function with a time range adjustable from 0.5 to 10 seconds and operates on a wider voltage input of 100 to 127V AC/DC. This block provides one Normally Open (NO) and one Normally Closed (NC) contact configuration.

This auxiliary switch block is integral to implementing timed control sequences in industrial automation systems. Applications include motor control, interlocks, and signaling where a delayed shutdown is required. It is suitable for use in control panels and machinery across various sectors, including manufacturing, automation, and process industries.

Stanlo Automation, your veteran-owned source for surplus industrial automation parts, offers the Siemens 3RT1916-2FK21. Ensure your control systems remain operational by sourcing reliable and cost-effective components from us.

Technical specifications

Type	Auxiliary Switch Block
Function	OFF Delay
Time Range	0.5-10 s
Voltage	100-127 V AC/DC
Contacts	1 NO + 1 NC
Mounting	Front Mount
Size	S00

Common applications

Motor control

Control panel automation

Machine safety circuits

Process control

Interlocking systems

Manufacturing automation

Compatible systems

Siemens 3RT2 Size S00 Contactors

Also known as

SIRIUS 3RT1916-2FK21 Siemens timing auxiliary switch OFF delay module

Replaces / compatible with

This phased-out product has a preferred successor type of SIRIUS 3RA2815-1FW10. It is designed to snap onto the front of Siemens 3RT2.1 Size S00 contactors.

Technical note

Expert tip

Ensure the power supply to the 3RT1916-2FK21 matches its 100-127V AC/DC rating for correct operation of the OFF delay function.

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Frequently asked questions

What voltage range and time delay does the Siemens 3RT1916-2FK21 support?

The Siemens 3RT1916-2FK21 is an auxiliary switch block with an OFF delay function, operating on 100-127V AC/DC. It offers an adjustable time range from 0.5 to 10 seconds and includes 1 NO and 1 NC contact.