The OZD Profi 12M G12-1300 (part of the Hirschmann Industrial Fiber Optic series) is a specialized repeater module designed for reliable PROFIBUS data transmission over fiber optic cables. The “EEC” designation denotes its “Extended Environmental Conditions” rating, making it suitable for operation in harsh industrial environments with extreme temperatures and high levels of electromagnetic interference.
Product Specifications
| Feature | Details |
| Model | OZD Profi 12M G12-1300 EEC PRO |
| Data Rate | Up to 12 Mbit/s (Autodetect) |
| Interface | PROFIBUS (Electrical RS485 / Optical) |
| Fiber Type | Multimode (1300 nm wavelength) |
| Environmental | EEC (Extended Environmental Conditions) |
| Housing | Ruggedized, DIN-rail mountable |
| Connectivity | 2x Optical (ST connector), 1x Electrical (Sub-D) |
Application Fields
This module is widely used in industrial automation where copper-based PROFIBUS cables are insufficient due to distance or noise:
- Large-Scale Facilities: Extending PROFIBUS networks over long distances (up to several kilometers using fiber).
- High-EMI Environments: Providing complete galvanic isolation between segments, protecting control equipment from surges and interference.
- Redundant Networks: Supporting ring topologies to ensure that a single fiber break does not bring down the entire control system.
- Harsh Conditions: Ideal for power plants, mining, or chemical processing where temperature fluctuations and harsh air quality exist.
Product Usage Instructions
- Mounting: Snap the module onto a standard 35mm DIN rail. Ensure the device is installed in an upright position to allow for proper heat dissipation.
- Electrical Connection: Connect the PROFIBUS segment using the 9-pin Sub-D connector. Ensure the bus is correctly terminated at the physical end of the segments.
- Optical Connection: Connect the fiber optic cables to the ST ports. Ensure the fibers are clean and properly polished. Use the “Rx” and “Tx” indicators to ensure a proper handshake.
- Configuration: The module automatically detects the baud rate of the PROFIBUS network. Use the integrated switches if specific diagnostic or operating modes (e.g., ring vs. line) need to be set.
- Diagnostics: Observe the LED array on the front panel. It provides real-time information on power status, data activity, and optical link integrity.
Frequently Asked Questions
Q: What does the “1300” in the model number signify?
A: It indicates the optical wavelength of 1300 nm, which is used for transmission over multimode fiber. This wavelength provides a good balance between distance capability and attenuation for typical industrial runs.
Q: Is this module compatible with standard PROFIBUS cables?
A: Yes, it acts as an optical repeater. It takes the electrical PROFIBUS RS485 signal from a copper cable and converts it to an optical signal for the fiber portion of the network, and vice versa.
Q: How do I implement a redundant ring?
A: Using two optical ports, you can connect the OZD modules in a ring. If a cable is cut, the modules automatically switch to an alternative path to maintain communication integrity.
Q: What should I do if the “Optic” LED is red?
A: A red or unlit optical LED typically indicates a break in the fiber, a bent cable, or a dirty optical connector. Ensure the cable is intact and that you are using the correct fiber type (multimode).
