Siemens 3RT1955-5PF31 Withdrawable Electronic Drive for Contactor 3RT105 / 3RT145, 96-127V AC/DC Original Brand New

Overview

The Siemens SIRIUS 3RT1955-5PF31 is a high-performance, withdrawable electronic drive (also known as a solenoid coil or spare coil) specifically designed for use with SIRIUS power contactors of sizes 3RT105 and 3RT145 (Size S6). This sophisticated drive unit supports flexible AC (50-60 Hz) and DC operation with a broad control supply voltage range of 96 to 127 V.

Its key feature is the integrated electronic operating mechanism with a dedicated 24 V DC PLC input, ensuring seamless integration into modern automation systems. It also includes an RLT (Residual Life-Time) signal for predictive maintenance, a crucial feature for maximizing system uptime.

Benefit

• Optimized Integration: Features a dedicated 24V DC PLC input, making direct connection to programmable logic controllers easy and reliable for advanced machine control.
• Predictive Maintenance: The RLT signal provides valuable data on the coil’s remaining operational lifespan, allowing for planned replacement and minimizing unexpected downtime.
• Versatile Power Compatibility: Operates seamlessly across a wide voltage band ($96-127\text{V}$) and supports both $\text{AC}$ and $\text{DC}$ control supply, reducing inventory complexity.
• High Reliability: As a genuine Siemens SIRIUS component, it ensures long-term operational reliability and compatibility with 3RT105/3RT145 power contactors.
• Easy Servicing: The withdrawable design facilitates quick and tool-free replacement, simplifying maintenance procedures.

Function

The 3RT1955-5PF31 electronic drive replaces the standard coil in the Siemens 3RT105 and 3RT145 contactors. It receives the control signal, typically from a PLC via the 24V DC input, and converts it to the mechanical force required to actuate the contactor’s main contacts. The integrated electronics manage the coil’s power consumption for efficient operation, while the RLT function actively monitors and reports the coil’s health status back to the control system.

For more of our high-quality industrial automation products, visit turll.