Siemens 2XV9450-1AR23 – SICLOCK TM Plant Central Clock | Industrial Time Synchronization Platform
Engineering Background: Precise time synchronization is a foundational requirement in modern industrial automation. Distributed control systems, SCADA networks, protection relays, and event loggers all depend on a common, accurate time reference to ensure data integrity, fault tracing, and regulatory compliance. The Siemens SICLOCK TM series was engineered specifically to meet these demands in plant-wide environments.
Product Positioning: The Siemens 2XV9450-1AR23 (order reference E10433-E9600-H110) is the central master clock unit of the SICLOCK TM platform. It accepts a wide-range AC/DC supply (90–230 V), integrates GPS or DCF77 time sources, and distributes synchronized time signals across the entire plant network — making it the authoritative time reference for all connected subsystems.
Complete Technical Specifications
| Manufacturer | Siemens AG |
| Part Number | 2XV9450-1AR23 |
| Order Reference | E10433-E9600-H110 |
| Product Series | SICLOCK TM (Time Management) |
| Function | Plant Central Master Clock |
| Supply Voltage | 90–230 V AC/DC (wide-range) |
| Time Source Input | GPS antenna / DCF77 radio signal |
| Time Distribution Outputs | Serial (RS-232/RS-485), IRIG-B, NTP/SNTP (Ethernet) |
| Synchronization Accuracy | ≤ 1 µs (GPS-locked) |
| Holdover Accuracy | Quartz oscillator, ≤ 1 ms/day drift |
| Communication Interfaces | Ethernet (RJ45), Serial ports |
| Protocols Supported | NTP, SNTP, IRIG-B, DCF77, proprietary Siemens SICLOCK |
| Mounting | 19-inch rack / DIN rail compatible |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -25 °C to +70 °C |
| Protection Class | IP20 |
| Weight | 3,060 g |
| Compliance | CE, UL, IEC 60068, EN 61000 (EMC) |
Proven Application Environments
- Power Generation & Utilities: Synchronizing protection relays, fault recorders, and SCADA systems across substations and generating plants.
- Oil & Gas: Providing a unified time base for DCS, safety instrumented systems (SIS), and historian servers in refineries and offshore platforms.
- Manufacturing & Process Industry: Coordinating PLC networks, MES systems, and quality event logs in automotive, chemical, and pharmaceutical plants.
- Railway & Transportation Infrastructure: Timestamping signaling events and control system logs to IEC 61850 and EN 50159 standards.
- Water Treatment & Utilities: Aligning SCADA polling cycles and alarm logs across geographically distributed pump stations.
- Data Centers & Telecom: Serving as a stratum-1 NTP source for IT/OT convergence networks.
Engineering Advantages
- Wide-Range Power Supply (90–230 V AC/DC): Eliminates the need for external power conditioning; compatible with both AC mains and DC battery-backed UPS systems — critical for substation environments.
- Sub-Microsecond GPS Accuracy: GPS-disciplined oscillator delivers ≤ 1 µs synchronization, meeting IEC 61850-5 and IEEE 1588 (PTP) accuracy requirements for protection applications.
- Redundant Time Source Architecture: Automatic failover between GPS and DCF77 inputs ensures continuous operation during antenna outages or signal interference.
- Multi-Protocol Output: Simultaneously distributes NTP/SNTP to Ethernet devices, IRIG-B to protection relays, and serial time telegrams to legacy PLCs — one unit serves the entire plant.
- Robust Industrial Design: Rack-mount form factor with conformal-coated PCBs rated for 0–55 °C continuous operation in harsh industrial environments.
- Siemens Ecosystem Integration: Native compatibility with SIMATIC, SINAUT, and SICAM product families; plug-and-play with existing Siemens automation infrastructure.
System Architecture & Signal Flow
The 2XV9450-1AR23 operates as the stratum-0/stratum-1 time source at the top of the plant time hierarchy:
- Time Acquisition: GPS antenna (or DCF77 receiver) delivers UTC-traceable time to the central clock unit.
- Internal Disciplining: The onboard TCXO/OCXO oscillator is continuously disciplined to the reference signal, maintaining accuracy during brief outages (holdover mode).
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Time Distribution: The unit simultaneously outputs:
- NTP/SNTP packets over Ethernet to servers, HMIs, and network switches.
- IRIG-B analog/digital signals to protection relays and fault recorders.
- Serial time telegrams (DCF77 emulation, proprietary) to legacy field devices.
- Monitoring & Diagnostics: Front-panel LEDs and SNMP traps provide real-time status of GPS lock, synchronization quality, and output channel health.
Sourcing & Quality Verification
At Konmask.com, every Siemens component undergoes a structured verification process before shipment:
- Step 1 — Documentation Review: Original Siemens order documentation, CE declaration, and factory test certificates are cross-referenced against the unit’s nameplate data (part number, order reference, date code).
- Step 2 — Physical Inspection: Housing integrity, connector condition, label authenticity (holographic Siemens security labels where applicable), and PCB visual inspection are performed by trained technicians.
- Step 3 — Functional Bench Test: Unit is powered at rated voltage; GPS lock acquisition, NTP output, and IRIG-B signal integrity are verified with calibrated test equipment.
- Step 4 — Packaging & ESD Protection: Unit is repackaged in anti-static foam with desiccant, and a Konmask inspection certificate is included with every shipment.
Procurement Process
- Submit Inquiry: Contact us at support@konmask.com or via the product page with your required quantity and delivery timeline.
- Quotation & Lead Time: We respond within 1 business day with pricing, availability confirmation, and estimated lead time (typically 3–10 business days for in-stock units).
- Order Confirmation: Purchase order or proforma invoice issued; payment via T/T, PayPal, or trade assurance accepted.
- Quality Check & Dispatch: Unit passes our 4-step verification before dispatch; tracking number provided within 24 hours of shipment.
- After-Sales Support: 12-month warranty on all verified units; technical support available via email and WhatsApp.
Technical FAQ
Q: Is this unit compatible with IEC 61850 substation automation systems?
A: Yes. The SICLOCK TM 2XV9450-1AR23 supports SNTP over Ethernet and IRIG-B outputs, both of which are standard time synchronization methods in IEC 61850 compliant substations.
Q: Can it operate without a GPS signal?
A: Yes. In holdover mode, the internal oscillator maintains time with a drift of ≤ 1 ms/day. DCF77 can serve as a secondary reference if GPS is unavailable.
Q: What is the difference between the 2XV9450-1AR23 and other SICLOCK TM variants?
A: The 2XV9450-1AR23 is the plant-level central master clock with full multi-protocol output capability. Other variants in the SICLOCK TM family serve as slave clocks or zone clocks that receive time from this master unit.
Q: Do you provide the original Siemens documentation?
A: Yes. Original datasheet, wiring diagram, and available factory test records are provided upon request with every order.
Q: What is the warranty period?
A: All units sold by Konmask.com carry a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions.
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