The Siemens 3RT2927-2PA01 is a SIRIUS pneumatic delay block designed to provide reliable ON-delay timing functionality for industrial contactor applications. This accessory is engineered for use with Siemens SIRIUS 3RT2 Size S0 contactors and enables precise timing control in motor starters, automation systems, control panels, and industrial switching applications. The delay block features an adjustable timing range of 1 to 30 seconds, allowing flexible configuration to suit a variety of operational requirements.
The 3RT2927-2PA01 operates using a proven pneumatic timing mechanism, ensuring dependable performance without the need for an external power supply. The ON-delay function causes the auxiliary contacts to switch after a preset delay once the contactor coil is energized, making it ideal for sequential motor starting, process control, timing circuits, and machine automation applications.
Designed specifically for Siemens SIRIUS 3RT202 contactors (Size S0), the module mounts directly onto the contactor using a convenient clip-on mechanism. This compact design simplifies installation while maintaining a space-saving panel layout. The timer can be mounted in any position and integrates seamlessly with Siemens motor control systems.
The delay block includes 1 delayed Normally Open (NO) contact and 1 delayed Normally Closed (NC) contact, providing flexible switching options for control and signaling circuits. These delayed auxiliary contacts can be used for motor sequencing, interlocking functions, alarm systems, process timing, and automation control tasks.
With a mechanical service life of up to 3 million operating cycles, the 3RT2927-2PA01 offers excellent durability and long-term reliability in demanding industrial environments. The device features IP20 protection, screw terminal connections, and compliance with major international standards including CE, UL, CSA, and CCC approvals.
As part of the trusted Siemens SIRIUS 3RT29 accessory range, the 3RT2927-2PA01 Pneumatic Delay Block is widely used in motor control centers (MCCs), manufacturing plants, conveyor systems, HVAC installations, packaging machinery, and industrial automation systems requiring accurate time-delayed switching functions.
| Specification | Details |
|---|---|
| Product Name | Pneumatic Delay Block |
| Brand | Siemens |
| Series | SIRIUS 3RT29 |
| Model Number | 3RT2927-2PA01 |
| SKU | 3RT2927-2PA01 |
| Product Type | Pneumatic Timer Block |
| Timing Function | ON Delay |
| Adjustable Delay Time | 1 – 30 Seconds |
| Contact Configuration | 1NO + 1NC |
| Delayed Contacts | 1 NO Delayed, 1 NC Delayed |
| Operating Principle | Pneumatic |
| Compatible Contactor Series | Siemens SIRIUS 3RT2 |
| Suitable Contactor Size | S0 |
| Compatible Contactors | 3RT202 Series |
| Mounting Method | Clip-On |
| Terminal Type | Screw Terminals |
| Rated Insulation Voltage (Ui) | 690 V |
| Protection Class | IP20 |
| Mechanical Service Life | 3 Million Operations |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -50°C to +80°C |
| Mounting Position | Any |
| Standards & Approvals | CE, UL, CSA, CCC |
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