Description
SIEMENS 6GK1503-3CB00 Fiber Optic Link Module
Product Dimensions:
1. Product Detailed Description
The 6GK1503-3CB00 features one electrical RS-485 interface and two optical interfaces (utilizing 4 BFOC sockets). This allows it to support various network topologies, including point-to-point, line (daisy-chain), and redundant rings. It is part of the SIMATIC NET family and is specifically engineered for PROFIBUS DP and PROFIBUS PA networks.
2. Technical Parameters
| Category | Specification |
| Part Number | 6GK1503-3CB00 |
| Product Type | PROFIBUS OLM/G12 V4.0 |
| Transfer Rate | 9.6 kbit/s to 12 Mbit/s (PROFIBUS DP) |
| Interfaces | 1x RS-485 (9-pin Sub-D), 2x Optical (Glass FOC, BFOC ports) |
| Transmission Distance | Up to 2,850 meters (Standard glass fiber) |
| Supply Voltage | 24 V DC (Range: 18.8 V to 28.8 V) |
| Redundancy | Supports Redundant Power Supply & Ring Redundancy |
| Diagnostics | Signaling contact and analog measuring output |
| Protection Class | IP40 |
| Dimensions | 39.5 mm (W) x 112 mm (H) x 74.5 mm (D) |
| Operating Temp | 0°C to +60°C |
3. Product Advantages
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Immunity to Interference: Fiber optic transmission is completely immune to electromagnetic interference (EMI) and lightning, making it ideal for industrial plants with heavy machinery.
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Extended Range: Allows PROFIBUS networks to span up to nearly 3km without signal degradation, far exceeding the limits of copper wiring.
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High Availability: Supports redundant ring topologies; if one fiber link fails, the system automatically reroutes data to prevent downtime.
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Maintenance Friendly: Includes a signaling contact (relay) to alert control systems of faults and a measuring output to check the optical signal quality without interrupting operation.
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Compact Design: The slim 40mm housing saves significant space on the DIN rail.
4. Important Precautions
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Fiber Handling: Do not bend glass fiber-optic cables beyond their specified minimum bending radius to avoid internal fractures.
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Cleanliness: Always keep the BFOC sockets covered with dust caps when not in use. Even microscopic dust can cause significant signal loss.
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Power Supply: Ensure the 24V DC supply is stable. For critical applications, utilize the redundant power input terminals.
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Laser Safety: While the LEDs are Class 1, avoid looking directly into the optical ports or fiber ends when the module is powered.
5. Product Applications
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Large-Scale Factories: Connecting PLC systems across different buildings or far-flung production lines.
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Power & Utilities: Used in power plants and water treatment facilities where electrical noise and grounding potential differences are common.
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Infrastructure: Transportation systems (tunnels/railways) where long-distance, interference-free communication is vital.
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Hazardous Environments: Segregating electrical segments in process industries to prevent spark propagation.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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