Hirschmann OZD Profi 12M G12-1300 PRO Fieldbus Repeater

Hirschmann OZD Profi 12M G12-1300 PRO Fieldbus Repeater

The Hirschmann OZD Profi 12M G12-1300 PRO (Belden Part Number: 943 907-321) is an industrial-grade, highly specialized optical fiber interface designed to convert electrical PROFIBUS-DP signals into optical signals. 

This unit is engineered to deliver reliable fieldbus communication over extreme distances in high-interference environments, such as large-scale photovoltaic (PV) power plants and heavy utility stations.

Product Introduction / Overview

In massive utilities such as utility-scale photovoltaic (PV) plants, tracking systems and inverter cabinets are spread across several square kilometers. Standard copper PROFIBUS cables fail due to distance limits and severe electromagnetic interference (EMI) from the switching actions of solar inverters.

The OZD Profi 12M G12-1300 PRO solves this by converting the electrical PROFIBUS signal into optical pulses. Featuring 1 electrical Sub-D 9-pin port and 2 optical channels (BFOC/ST sockets), it supports single-mode optical fiber lines to transmit data up to 15 km without signal loss. It features a robust metal housing designed to withstand extreme climate conditions, making it the perfect choice for PV combiner boxes and outdoor conversion stations.

Technical Table

Environmental Tolerance Conditions

Specifically built for deployment in outdoor solar tracking cabinets and remote conversion stations:

Operating Temperature: $-20^circtext{C}$ to $+60^circtext{C}$ (Standard range)

Storage Temperature: $-40^circtext{C}$ to $+70^circtext{C}$

Relative Humidity: Up to 95% (Non-condensing)

Enclosure Rating: IP40 (Dust-protected, durable metal housing)

Conformal Coating: Internal PCB assemblies are protected against humidity, salt spray, and atmospheric contaminants typical of desert solar farms.

Operating Instructions

1. Hardware Configuration (DIP Switches)

Before powering on, configure the sliding DIP switch bank located on the front of the device. Adjust the switches to select:

Redundancy Mode: Enable or disable Ring Redundancy depending on whether your fiber network is designed as a line, star, or redundant ring.

Compatibility: Enable compatibility settings if mixing newer "PRO" modules with older standard OZD Profi units in the same network topology.

2. Power and Signal Wiring

Power Connection: Connect redundant $24text{ V DC}$ power lines to the 5-pin terminal block on top of the device. Ensure both primary ($L1+$) and backup ($L2+$) lines are securely wired.

Fieldbus Connection: Insert the PROFIBUS Sub-D 9-pin connector into the CH1 port. Fasten the connector screws securely.

Fiber Terminals: Connect the transmitter (Tx) of the local module to the receiver (Rx) of the remote module, and vice versa.

Fault Diagnosis

The OZD Profi features a built-in diagnostic interface on the front panel to streamline troubleshooting in the field:

Signal Quality Voltage Output: The front terminal block provides an analog voltage output ($0text{ V}$ to $5text{ V}$) that directly correlates to the incoming optical power. A technician can test this with a standard multimeter to verify fiber alignment and clean connections without disconnecting the network.

System LED Diagnostics:

Related Models of the Same Series

Hirschmann offers a wide variety of OZD Profi models optimized for different fiber types, distances, and protocols:

OZD Profi 12M G11-PRO (943 907-311): 1 x Electrical Port, 1 x Optical Port (Multi-mode fiber, $850text{ nm}$ wavelength).

OZD Profi 12M G12-PRO (943 907-211): 1 x Electrical Port, 2 x Optical Ports (Multi-mode fiber, $850text{ nm}$ wavelength up to 3 km).

OZD Profi 12M G11-1300 PRO (943 907-421): 1 x Electrical Port, 1 x Optical Port (Single-mode fiber, $1300text{ nm}$ wavelength up to 15 km).

OZD Profi 12M G12-1300 EEC (943 905-321): Extended temperature range version ($-40^circtext{C}$ to $+70^circtext{C}$) for harsh environments.

Storage Conditions

To ensure longevity when storing replacement spares:

Keep devices stored in their original anti-static packaging in a clean, dust-free environment.

Storage Temperature Limit: Maintain between $-40^circtext{C}$ and $+70^circtext{C}$.

Moisture Prevention: Humidity must be kept under 95%, free of condensation. Ensure protective plastic dust caps remain installed over all BFOC/ST optical ports to prevent dust from settling on internal laser transmitters and receivers.