SIEMENS 3RP1540-1BN30 – Multi-Function Time Relay | SIRIUS Control Platform
Engineering Background: The 3RP1540-1BN30 belongs to Siemens’ SIRIUS modular control portfolio — the industry benchmark for reliable, compact timing solutions in industrial automation. Designed for demanding panel environments, this relay delivers eight selectable timing functions with wide-range supply voltage compatibility, eliminating the need for multiple single-function devices.
Product Positioning: Targeted at panel builders, OEM machine designers, and MRO procurement engineers who require a single, versatile timing relay that covers the full spectrum of delay functions — from on-delay and off-delay to star-delta and single-pulse modes — within a standard 22.5 mm DIN-rail footprint.
Complete Technical Specifications
| Manufacturer Part Number | 3RP1540-1BN30 |
| Brand / Series | SIEMENS / SIRIUS |
| Device Type | Multi-Function Time Relay |
| Supply Voltage | 24–240 V AC/DC (wide-range) |
| Frequency | 50 / 60 Hz |
| Timing Functions | 8 selectable (on-delay, off-delay, on/off-delay, star-delta, single-pulse, etc.) |
| Time Range | 0.05 s – 100 h (multi-range) |
| Output Contacts | 2 CO (changeover) contacts |
| Contact Rating | 5 A / 250 V AC |
| Mounting | DIN rail (35 mm) / screw mounting |
| Width | 22.5 mm |
| Protection Degree | IP20 (terminals), IP40 (housing) |
| Ambient Temperature | -25 °C to +60 °C (operation) |
| Standards | IEC 60947-5-1, CE, UL, cUL |
| Weight | approx. 100 g |
| Country of Origin | Germany / EU |
Proven Application Environments
- Motor Control Centers (MCC): Star-delta starting sequences for 3-phase induction motors up to 400 V
- HVAC & Building Automation: Fan/pump sequencing, compressor delay-on-start protection
- Conveyor & Material Handling: Controlled start/stop intervals to prevent mechanical shock
- Process Industry: Valve actuation timing, batch process sequencing in chemical and food plants
- Machine Tool Panels: Spindle warm-up delays, coolant pump interlocks
- Water Treatment: Pump alternation and dosing timer control
Engineering Advantages
- Wide-Range Supply (24–240 V AC/DC): Single SKU covers global voltage standards — reduces spare-parts inventory by up to 80%
- 8-in-1 Function Selector: Rotary switch selects timing mode without rewiring — cuts commissioning time significantly
- Plug-in Socket Compatible: Fits standard 8-pin and 11-pin SIRIUS sockets for tool-free field replacement
- LED Status Indication: Dual LEDs for supply voltage and output state — instant visual diagnostics
- Vibration & Shock Resistant: Rated to IEC 60068-2-6 for mobile machinery and harsh panel environments
- Long Electrical Life: >10 million operations at rated load — minimizes unplanned downtime
System Architecture & Signal Flow
The 3RP1540-1BN30 integrates directly into SIRIUS control circuits:
- Input Stage: Wide-range AC/DC supply detected by universal input circuit — no external rectifier required
- Timing Core: Microprocessor-based timing engine with rotary function selector and multi-range potentiometer
- Output Stage: 2 independent CO relay contacts — wired to contactors, solenoids, or PLC digital inputs
- Typical Wiring: A1/A2 supply terminals → timing circuit → 11/12/14 and 21/22/24 output contacts
- Socket Compatibility: 3RP1903 (8-pin) or 3RP1905 (11-pin) SIRIUS relay sockets
Sourcing & Quality Verification
- ✅ OEM-Verified Stock: All units sourced through authorized SIEMENS distribution channels with full traceability
- ✅ Holographic Label Check: Each unit carries genuine SIEMENS anti-counterfeit hologram — verifiable via SIEMENS Product Authenticity Check portal
- ✅ Batch Documentation: Certificate of Conformity (CoC) and factory test report available on request
- ✅ Packaging Integrity: Ships in original SIEMENS retail packaging with intact seals
- ✅ Warranty: 12-month Konmask quality guarantee; manufacturer warranty honored
Procurement Process
- Confirm Quantity & Lead Time: Contact us via email or WhatsApp with your required quantity — real-time stock confirmation within 2 business hours
- Quotation & PI: Proforma Invoice issued within 4 hours; bulk pricing available for orders ≥ 5 units
- Payment: T/T (wire transfer), PayPal, or secure online checkout — 100% payment before shipment for new accounts
- Shipping: DHL Express / FedEx International Priority — typical transit 3–7 business days worldwide; EXW Xiamen available
- Documentation: Commercial Invoice, Packing List, CoC, and HS Code 8536.49 declaration included
Technical FAQ
Q: Can the 3RP1540-1BN30 replace a 3RP1525 or 3RP1505?
A: Yes — the 3RP1540 series is the successor platform. It is pin-compatible with standard SIRIUS sockets and covers all functions of earlier single-function models.
Q: What is the difference between 3RP1540-1BN30 and 3RP1540-1BB30?
A: The suffix -1BN30 indicates a wide-range supply (24–240 V AC/DC). The -1BB30 variant is rated for 24 V DC only. Confirm your panel supply voltage before ordering.
Q: Is this relay suitable for ATEX / hazardous area use?
A: The standard 3RP1540-1BN30 is rated IP20 and is not ATEX-certified. For hazardous locations, consult SIEMENS for the appropriate Ex-rated variant.
Q: Can I get a datasheet or wiring diagram?
A: Yes — contact support@konmask.com and we will provide the official SIEMENS datasheet, wiring diagram, and dimensional drawing within 1 business day.
Q: Do you offer DDP (Delivered Duty Paid) shipping?
A: DDP is available for select destinations. Please confirm your country at inquiry stage for a DDP quotation including import duties and VAT.
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