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                        • SIEMENS 3RH1911-1FB22 Auxiliary Contact Block

                          Product Overview

                          SIEMENS 3RH1911-1FB22 is a SIRIUS Auxiliary Contact Block designed for installation on SIEMENS contactors and contactor relays. It is used to expand the available auxiliary contacts for control, feedback, interlocking, and signal circuits.

                          This model is a front-mounted auxiliary switch block with 2 normally open contacts + 2 normally closed contacts (2NO + 2NC), suitable for S00 size auxiliary and motor contactors.

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                          Specifications

                          • Brand: SIEMENS
                          • Series: SIRIUS 3RH19
                          • Model: 3RH1911-1FB22
                          • Product Type: Auxiliary Contact Block / Auxiliary Switch Block
                          • Contact Configuration: 2NO + 2NC
                          • Mounting Type: Front snap-on mounting
                          • Size: S00
                          • Connection Type: Screw Terminal
                          • Compatible Devices:
                            • SIEMENS SIRIUS contactor relays
                            • SIEMENS power contactors
                          • Rated Insulation Voltage: 690 V
                          • Rated Impulse Withstand Voltage: 6 kV
                          • Protection Rating: IP20 (front)
                          • Mechanical Life: Approx. 10 million switching cycles
                          • Electrical Life: Approx. 200,000 switching cycles (AC-15, 230 V)
                          • Operating Temperature: -25…+60 °C

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                          Advantages & Features

                          • Provides additional auxiliary contacts for existing contactors
                          • Flexible 2NO + 2NC contact arrangement
                          • Easy front mounting without replacing the main contactor
                          • Compact S00 design saves cabinet space
                          • Reliable signal switching performance
                          • Suitable for PLC feedback and control circuits
                          • Improves system monitoring and electrical interlocking capability
                          • Designed for Siemens SIRIUS contactor systems

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                          Applications

                          • Industrial automation control panels
                          • Motor starter circuits
                          • PLC input feedback circuits
                          • Contactor status monitoring
                          • Electrical interlocking systems
                          • Machine control equipment
                          • Factory automation systems
                          • Control cabinet signal expansion

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                          Precautions

                          • Confirm compatibility with the installed SIEMENS contactor model before use
                          • Check the contact arrangement (2NO + 2NC) before wiring
                          • Do not exceed auxiliary contact current ratings
                          • Ensure the block is properly snapped onto the contactor
                          • Disconnect power before installation or maintenance
                          • Verify wiring after installation

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