OZD PROFI 12M G11 - PROFIBUS Fiber Optic Repeater | Hirschmann
MPN: OZD PROFI 12M G11 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1450 | $1,450.00 |
| 10 | $1380 | $13,800.00 |
| 25 | $1320 | $33,000.00 |
| 50 | $1250 | $62,500.00 |
| 100 | $1180 | $118,000.00 |
OZD PROFI 12M G11 Overview
A PROFIBUS fiber-optic repeater is an industrial networking device that bridges copper-based RS-485 fieldbus segments with optical fiber segments. Repeaters sit at the physical layer of the OSI model, regenerating and retiming signals to extend bus reach beyond the copper segment limit (typically 1200 m at 9.6 kBit/s down to 100 m at 12 Mbit/s) and to provide galvanic isolation between segments, which eliminates ground-loop-induced communication errors and adds immunity to electromagnetic interference (EMI) on factory floors.
Key features include a 24 V DC supply input, multimode 860 nm optical wavelength, IP40 protection rating, and rail-mount DIN-style housing. The repeater function is enabled by default and is user-configurable via DIP switches, including signal regeneration, segment termination, and functional compatibility with earlier OZD Profi generations. The unit is part of the OZD Profi 12M family from Belden/Hirschmann, the de-facto standard for PROFIBUS optical networking in process automation.
The OZD PROFI 12M G11 is designed for use in optical PROFIBUS field bus networks according to IEC 61784 ED.1:2002 CPF3/1. Internally it implements a transparent RS-485 to optical media converter that does not introduce measurable jitter at PROFIBUS data rates up to 12 Mbit/s. The two ST (BFOC 2.5) optical sockets allow daisy-chained or redundant ring topologies by simply connecting TX of one segment to RX of the next.
Typical applications include PROFIBUS DP segment extension in factory automation, optical isolation between welding robots and PLC cabinets, hazardous-area PROFIBUS networks in chemical and petrochemical plants, and redundant fiber backbone rings in power plants and water/wastewater facilities. The Ex-zone 2 (Class I Div 2) approval makes it particularly attractive for Zone-classified process-industry installations.
When designing with this device, remember that each repeater counts toward the maximum number of repeaters allowed per PROFIBUS segment (typically 9 between any two masters). Always enable bus termination on the end segments only, and verify fiber budget against the 860 nm attenuation specification of your multimode cable.
This page synthesizes distributor pricing, drop-in same-family variants, and practical design notes for engineers specifying PROFIBUS optical repeaters, complementing the manufacturer datasheet with peer-cited alternatives.
Drop-in alternatives for OZD PROFI 12M G11 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OZD Profi 12M G11 PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD Profi 12M G11-1300
✅ Drop-In📋 Reference alternative (not in catalog)
OZD Profi 12M G12
✅ Drop-In📋 Reference alternative (not in catalog)
OZD Profi 12M G12-EEC
✅ Drop-In📋 Reference alternative (not in catalog)
OZD Profi 12M G11-1300 PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G11 Specifications (manufacturer-published)
| Product Type | PROFIBUS Fiber-Optic Repeater / Electrical-to-Optical Converter |
| Manufacturer Order Number | 942 148-001 (formerly 943 727-221) |
| Brand | Hirschmann (Belden) |
| Supported Protocols | PROFIBUS DP-V0, DP-V1, DP-V2, FMS |
| Standards Compliance | IEC 61784 ED.1:2002 CPF3/1, EN 50170 part 1 |
| Optical Ports | 2 x BFOC 2.5 (STR) sockets, ST-compatible |
| Electrical Ports | 1 x Sub-D 9-pin female, EN 50170 pin-out |
| Optical Wavelength | 860 nm |
| Fiber Type | Quartz glass multimode fiber |
| Supply Voltage | 24 V DC |
| Protection Rating | IP40 |
| Maximum PROFIBUS Data Rate | 12 Mbit/s |
| Hazardous Area Approval | Ex-zone 2 (Class I, Division 2) |
| Repeater Function | Yes (user-configurable via DIP switch) |
| Housing / Mounting | DIN-rail mount industrial housing |
OZD PROFI 12M G11 Pin Configuration
| Pin 1 | NC — Not connected (per EN 50170 PROFIBUS DB9 pinout) |
| Pin 2 | NC — Not connected (per EN 50170 PROFIBUS DB9 pinout) |
| Pin 3 | RxD/TxD-P (Data B) — PROFIBUS RS-485 data line B (positive) |
| Pin 4 | RTS — Request To Send (direction control, PROFIBUS master) |
| Pin 5 | DGND — Data ground reference for PROFIBUS bus |
| Pin 6 | VP (+5V) — Termination supply voltage for bus terminator |
| Pin 7 | NC — Not connected (per EN 50170 PROFIBUS DB9 pinout) |
| Pin 8 | RxD/TxD-N (Data A) — PROFIBUS RS-485 data line A (negative) |
| Pin 9 | NC — Not connected (per EN 50170 PROFIBUS DB9 pinout) |
Power & Thermal Characteristics
| Power Input | 24 V DC |
Power input and thermal parameters for OZD PROFI 12M G11 as published by the manufacturer.
Typical Applications
OZD PROFI 12M G11 is suitable for 6 applications: Factory Automation PROFIBUS Backbone, Hazardous-Area (Ex-zone 2) PROFIBUS Networks, Power Plant & Substation PROFIBUS Ring, Water/Wastewater Treatment Plant Networking, Robot Cell PROFIBUS Isolation, Long-Haul Plant PROFIBUS Backbone (G11-1300 variant).
Factory Automation PROFIBUS Backbone
The OZD PROFI 12M G11 is the de-facto PROFIBUS optical backbone component in discrete and process factories because it supports DP-V0/V1/V2 at 12 Mbit/s and converts RS-485 segments to 860 nm multimode fiber, immune to VFD and welding-rod EMI. Place one G11 at each cabinet exit to extend bus reach beyond the copper-segment limit and to provide galvanic isolation between machines. Compared to a copper-only segment, the G11 typically lifts PROFIBUS availability from days to years in noisy environments and adds zero measurable jitter at rated data rates per IEC 61784 CPF3/1.
Recommended
Hazardous-Area (Ex-zone 2) PROFIBUS Networks
The G11 variant carries Ex-zone 2 / Class I Div 2 approval, allowing direct installation in cabinet rooms adjacent to classified process areas in chemical, petrochemical and pharmaceutical plants. It converts the safe-area copper PROFIBUS trunk into a fiber segment that crosses into Zone 2 hazardous areas, eliminating ground loops and providing inherent electrical isolation. Use one G11 per Zone-2 cabinet and pair with an IS barrier when extending into Zone 1 or Zone 0 field segments, per the Hirschmann installation manual and IEC 60079 series guidance.
Recommended
Power Plant & Substation PROFIBUS Ring
In power-generation and T&D substations the G11 enables redundant fiber-optic PROFIBUS rings connecting generator controllers, turbine governors and protection relays across hundreds of meters. Two BFOC 2.5 sockets per unit support daisy-chain or counter-rotating ring topologies without external fiber patch panels. The IP40 industrial housing and 24 V DC supply integrate directly into substation DC battery systems, and the multimode fiber rejects the strong EMI fields typical of HV switchyards - a critical advantage over copper repeaters per IEC 61850-3 environments.
Recommended
Water/Wastewater Treatment Plant Networking
The OZD PROFI 12M G11 lets municipalities build long-distance PROFIBUS DP networks across treatment-plant tank farms, pump stations and remote wells where copper runs would exceed segment length or be exposed to moisture-induced ground faults. The multimode fiber with 860 nm optics tolerates the wet, corrosive environment and supports full 12 Mbit/s PROFIBUS DP-V2 to remote PLCs and VFDs. Compared to wireless alternatives, the G11 fiber link provides deterministic sub-millisecond latency required by closed-loop chemical-dosing control.
Recommended
Robot Cell PROFIBUS Isolation
Welding robots and large servo drives generate extreme EMI that corrupts copper PROFIBUS cables inside a robot cell. The G11 placed at the cell boundary converts the noise-free copper trunk to a fiber segment that crosses the cell, providing complete galvanic isolation and EMI immunity. The two ST-style BFOC 2.5 optical sockets allow simple in-cell and out-of-cell connections with standard patch cords. Compared to copper through the cell, the fiber-optic approach eliminates intermittent CRC errors and reduces PROFIBUS fault diagnosis time by orders of magnitude.
Recommended
Long-Haul Plant PROFIBUS Backbone (G11-1300 variant)
When the PROFIBUS backbone must run multi-kilometer distances between buildings or across large industrial campuses, the G11-1300 same-family variant (1300 nm wavelength, order number 942 148-004) provides the higher optical budget required for long-haul links. It is fully drop-in compatible with the G11 at the same Sub-D 9 electrical port and BFOC 2.5 optical sockets, allowing mixed copper/short-fiber/long-fiber segments within a single PROFIBUS network. The 1300 nm window also improves tolerance to fiber aging and reduces modal noise on legacy multimode plants.
Recommended
Recommended Products Summary
Engineering reference data for OZD PROFI 12M G11 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OZD Profi 12M G11 PRO | OZD Profi 12M G11-1300 | OZD Profi 12M G12 | OZD Profi 12M G12-EEC |
|---|---|---|---|---|---|
| Brand | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann |
| Package / Housing | DIN-rail industrial housing; Sub-D 9 + 2x BFOC 2.5 (ST) ports | Same DIN-rail housing, same connectors | Same DIN-rail housing, same connectors | Same DIN-rail housing, same connectors | Same DIN-rail housing, same connectors |
| Optical Wavelength | 860 nm | 860 nm | 1300 nm | 860 nm | 860 nm |
| PROFIBUS Data Rate | Up to 12 Mbit/s | Up to 12 Mbit/s | Up to 12 Mbit/s | Up to 12 Mbit/s | Up to 12 Mbit/s |
| Supply Voltage | 24 V DC | 24 V DC | 24 V DC | 24 V DC | 24 V DC |
| Repeater Function | Yes (user-configurable DIP) | Yes (with backward-compatibility DIP S8) | Yes (long-haul) | Yes | Yes |
Key Differentiators
- Backward-compatible PRO generation with explicit mixed-generation DIP (vs OZD Profi 12M G11 PRO)
- Long-haul 1300 nm optical window for higher-loss fiber runs (vs OZD Profi 12M G11-1300)
- Extended -20C to +60C temperature range for outdoor/unconditioned cabinets (vs OZD Profi 12M G12-EEC)
Design Notes
Mount the OZD PROFI 12M G11 vertically on a 35 mm DIN rail inside a grounded metal cabinet, leaving at least 30 mm clearance above and below for fiber bend radius (minimum 30 mm for ST/BFOC 2.5 patch cords). Route the 24 V DC supply from a dedicated, fused circuit and keep PROFIBUS cable separated from power wiring by at least 100 mm to preserve the IP40 rating and minimize conducted noise coupling. The two BFOC 2.5 sockets are NOT redundant by default - confirm ring topology is implemented externally via fiber patch cords before relying on it for redundancy.
PROFIBUS DP at 12 Mbit/s requires that each copper segment be terminated at both physical ends with the standard 220 ohm / 390 ohm termination network per EN 50170. When inserting a G11, only terminate the two copper segments directly attached to its Sub-D 9 port - never terminate on the fiber side. Enable the G11's built-in repeater function via DIP switch only when the copper segment length would otherwise exceed the PROFIBUS baud-rate-dependent limit (e.g. 100 m at 12 Mbit/s down to 1200 m at 9.6 kbit/s).
Estimated: do not exceed 9 repeaters between any two PROFIBUS DP masters per the PROFIBUS specification. Mixing OZD Profi 12M...b (current generation) with OZD Profi 12M...c (previous) requires setting DIP switch S8=0 to disable functional compatibility per the Hirschmann installation guide. Avoid using single-mode fiber with the standard 860 nm G11 - the optical budget will not be met; use the G11-1300 variant instead. Verify Zone-2 approval certificate validity for the specific manufacturing date before installing in a classified area.
Compliance Information
Ex-zone 2 / Class I Div 2 hazardous-area approval per Hirschmann datasheet. PROFIBUS compliance per IEC 61784 ED.1:2002 CPF3/1 and EN 50170. RoHS and lead-free compliant per Belden product page.
