Siemens SIRIUS 3RT2927-2PR01 Pneumatic OFF-Delay Timer Block for 3RT202 Contactors, 1-30s, 1 NO + 1 NC Original Brand New

Overview

The Siemens 3RT2927-2PR01 is a high-quality, pneumatically time-delayed auxiliary switch from the SIRIUS modular system, specifically designed to be clipped onto SIRIUS 3RT202 contactors (Size S0). This essential accessory provides a crucial OFF-delay timing function, adjustable from 1 to 30 seconds, ensuring controlled shutdown and sequencing in industrial control applications. It features a reliable 1 Normally Open (NO) and 1 Normally Closed (NC) delayed contact configuration, offering flexibility for various interlocking and timing circuits.

Benefit

1. Precision Control: Provides accurate and reliable OFF-delay timing (1-30s) to sequence machine processes and control cooling or run-down times after main contactor de-energization.
2. Seamless Integration: Designed for simple, clip-on mounting directly onto the front of Siemens 3RT202 contactors, saving panel space and simplifying wiring.
3. Versatile Contact Options: The 1 NO + 1 NC delayed contacts allow for both breaking and making of auxiliary circuits after the set time delay, accommodating diverse control logic.
4. Robust & Durable: Engineered by Siemens SIRIUS for high mechanical service life (3 million cycles) and reliable performance in demanding industrial environments (0∘C to 60∘C operating temperature).
5. Global Compliance: Suitable for worldwide use with CE, UL, CSA, and CCC certifications.

Function

The 3RT2927-2PR01 Pneumatic Timing Block is an essential accessory for motor and load control systems. When the main contactor (e.g., 3RT202) is de-energized, the pneumatic delay block begins its timing sequence. After the adjustable period of 1 to 30 seconds has elapsed, the delayed auxiliary contacts (1 NO and 1 NC) change state. This function, known as OFF-delay or delay on break, is critical for applications requiring a motor to continue running for a specific time after the stop command, such as ventilation fans, pumps, or controlled braking processes.

Application

• Controlled run-down of fans and pumps.
• Sequencing of control circuits.
• Timed interlocking in complex machinery.
• Providing a safe time delay before the next operation cycle begins.
• General industrial motor control applications using Siemens 3RT202 contactors.

For more our products visit turll