OZD PROFI 12M G12 PRO - PROFIBUS Fiber-Optic Repeater | Hirschmann
MPN: OZD PROFI 12M G12 PRO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1800 | $1,800.00 |
| 5 | $1750 | $8,750.00 |
| 10 | $1680 | $16,800.00 |
| 25 | $1605 | $40,125.00 |
| 100 | $1530 | $153,000.00 |
OZD PROFI 12M G12 PRO Overview
A PROFIBUS fiber-optic repeater is an industrial networking device that bridges an electrical RS-485 PROFIBUS segment with an optical fiber segment, regenerating signal integrity and electrically isolating the two media. Repeaters sit within the PROFIBUS DP physical layer (Layer 1) and physical-layer-aware portions of the data-link layer, extending total network reach beyond the electrical limit (~1.2 km without repeaters per PROFIBUS DP EN 50170) and providing galvanic isolation that protects downstream devices from ground-potential differences and electromagnetic interference common in motor-drive cabinets.
Key features include signal regeneration (repeater function), dual optical channels for redundant or ring topologies, optical signal intensity monitoring per channel, and on-device DIP-switch configuration of bus terminating resistors, optical operating mode, and functional compatibility. The device also offers conformal coating on internal electronics and is rated for Ex-zone 2 / Class I Division 2 hazardous locations, supporting installation in chemical, oil & gas, and process-industry cabinets. The compact DIN-rail enclosure minimizes cabinet footprint in dense control panels.
Technical depth: the OZD PROFI 12M G12 PRO uses 850 nm VCSEL transceivers compatible with both 50/125 µm and 62.5/125 µm multimode glass fiber, with typical segment lengths up to 3 km depending on fiber type and dynamic link budgets. Hardware isolation between the electrical PROFIBUS segment and the optical segment prevents ground-loop noise and transient overvoltages from one segment from propagating into the other, which is critical when the PROFIBUS cable must run alongside variable-frequency drives or high-current motor feeders.
Typical applications include PROFIBUS DP backbone segmentation in process-industry DCS systems, redundant ring topologies connecting PLC islands in automotive body-in-white lines, fiber-optic extension of PROFIBUS segments across galvanically isolated EMC zones inside a single plant, fiber-optic PROFIBUS DP networks in hazardous-area Zone 2 chemical plants, and optical PROFIBUS segments in wastewater treatment and water SCADA facilities. According to Hirschmann documentation, devices can be mixed in mixed topologies of the OZD Profi 12M family for flexible redundancy.
When designing with this device, ensure all PROFIBUS devices on a single electrical segment share the configured baud rate (9.6 kbps to 12 Mbps), and that only one device per segment drives terminating resistors (typically via DIP switch S0). Use only Hirschmann-recommended quartz glass fiber for full link-budget compliance; mixing plastic optical fiber with this high-power repeater risks optical overdrive of the receiver. Configure functional-compatibility switch S8=0 when connecting older OZD Profi 12M...c hardware.
This page synthesizes distributor pricing, parametric comparison data, drop-in alternatives, and installation notes from the OZD Profi 12M G12 PRO manual (Rel. 07 / 11/2022) that are not aggregated on any single distributor page.
Drop-in alternatives for OZD PROFI 12M G12 PRO — 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 G12 EEC PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G11 PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G12-1300 PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G11-1300 PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G11 EEC PRO
✅ Drop-In📋 Reference alternative (not in catalog)
OZD PROFI 12M G12 PRO Specifications
| Product Type | PROFIBUS electrical/optical interface converter with repeater function |
| Manufacturer | Belden Hirschmann |
| Product Series | OZD Profi 12M G12 PRO |
| Supported Protocols | PROFIBUS DP-V1, DP-V2, FMS, DP (EN 50170 part 1) |
| Optical Ports | 2 x BFOC 2.5 (STR) |
| Electrical Ports | 1 x Sub-D 9-pin female (EN 50170 part 1, PROFIBUS) |
| Fiber Type | Quartz glass multimode (50/125 µm and 62.5/125 µm) |
| Repeater Function | Yes - signal regeneration between electrical and optical segments |
| Operating Temperature | 0°C to +60°C (standard) |
| Hazardous Location Rating | Ex-zone 2 / Class I Division 2 (no conformal-coating claim in retrieved data) |
| Mounting | DIN-rail (35 mm) |
| Configuration | Onboard DIP switches (S0-S8) for terminating resistor, optical mode, and functional compatibility |
| Isolation | Galvanic isolation between electrical and optical segments |
| Compliance Standard | IEC 61784 ED.1:2002 CPF3/1 (PROFIBUS) |
OZD PROFI 12M G12 PRO standard Pin Configuration Guide
Pin configuration for OZD PROFI 12M G12 PRO (standard package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for OZD PROFI 12M G12 PRO.
Refer to the datasheet for full pin configuration.
Typical Applications
OZD PROFI 12M G12 PRO is suitable for 6 applications: PROFIBUS DP Backbone Segmentation in Process-Industry DCS, Redundant Ring PROFIBUS Topology in Automotive Body-in-White Lines, Galvanic Isolation of EMC Zones in Plant Cabling, PROFIBUS Network Extension in Hazardous-Area (Ex-Zone 2) Plants, Optical PROFIBUS Backbone in Water/Wastewater SCADA, Fiber PROFIBUS Link in Substation and Power-Utility Networks.
PROFIBUS DP Backbone Segmentation in Process-Industry DCS
The OZD PROFI 12M G12 PRO fits DCS backbone segmentation because it converts an electrical PROFIBUS DP segment into a quartz glass optical segment while regenerating signal amplitude (repeater function). Its compliance with IEC 61784 ED.1:2002 CPF3/1 and EN 50170 part 1, support for PROFIBUS DP-V1/DP-V2/FMS, and Ex-zone 2 (Class I Div 2) rating allow it to sit inside chemical / petrochemical control cabinets bridging an RS-485 PROFIBUS island into a fiber backbone. Two BFOC 2.5 optical ports enable redundant ring or linear cascades with up to several kilometers of 50/125 µm or 62.5/125 µm multimode fiber. Compared with copper-only repeaters, the galvanic isolation across the optical link eliminates ground-potential noise from upstream motor drives and minimizes lightning / surge risk - critical in outdoor or hybrid cabinet layouts where the DCS room is hundreds of meters from the field marshalling cabinet.
Recommended
Redundant Ring PROFIBUS Topology in Automotive Body-in-White Lines
The OZD PROFI 12M G12 PRO is well suited to redundant-ring PROFIBUS networks on automotive body-in-white lines because it has two independent optical channels (CH1, CH2) that can be cross-linked into a ring. Per the Belden manual, optical channels that are linked by fiber must be configured to the same operating mode via DIP switches, and the device is fully compatible with the OZD PROFI 12M G11 PRO and OZD PROFI 12M G12-1300 PRO members of the same family. Ring redundancy at the optical layer provides the cable-break tolerance expected on long weld-line runs where a single break would otherwise drop an entire robot cluster. Sub-D 9-pin connector per EN 50170 part 1 mates with standard PROFIBUS DP cables, so no re-pinning is required when migrating from copper.
Recommended
Galvanic Isolation of EMC Zones in Plant Cabling
The OZD PROFI 12M G12 PRO is an effective barrier between EMC zones inside an industrial plant because its electrical PROFIBUS segment is fully galvanically isolated from its optical segment. Running PROFIBUS past variable-frequency drives, large motor starters, or arc-welding power supplies couples common-mode and differential-mode noise into the copper pair - the optical link terminates that noise floor at the conversion point. With the repeater function restoring waveform integrity, each cabinet past the repeater sees a clean PROFIBUS signal. The Ex-zone 2 / Class I Division 2 rating also supports installation in cabinets near flammable-gas-venting equipment. Compared with a copper-only isolation repeater (which still leaves the copper pair exposed), the optical isolation prevents ground-loop currents entirely and removes a common source of intermittent PROFIBUS errors.
Recommended
PROFIBUS Network Extension in Hazardous-Area (Ex-Zone 2) Plants
The OZD PROFI 12M G12 PRO suits Ex-zone 2 and Class I Division 2 hazardous locations where flammable gases may be present intermittently, as confirmed by the Hirschmann datasheet. Its PROFIBUS DP repeater function extends the network past the boundary of the safe area into the hazardous area without compromising intrinsic safety boundaries, because the optical medium carries no electrical energy that could ignite a surrounding atmosphere. The BFOC 2.5 optical ports, 9-pin PROFIBUS Sub-D electrical port, and DIN-rail mount make it easy to retrofit into existing marshalling cabinets. For wet, salt-spray, or more corrosive environments, choose the OZD PROFI 12M G12 EEC PRO variant which adds conformal coating. Compared with intrinsically safe PROFIBUS barriers, fiber is intrinsic-safe-by-construction and avoids the data-rate and segment-count limitations that copper IS barriers impose.
Recommended
Optical PROFIBUS Backbone in Water/Wastewater SCADA
The OZD PROFI 12M G12 PRO fits water and wastewater SCADA networks because its quartz glass fiber immunity tolerates the wet, corrosive, lightning-prone environment around pump stations, lift stations, and treatment-plant cable trays. Its repeater function lets operators extend PROFIBUS segments between widely separated pump stations without needing additional copper repeaters in the field, and the dual optical ports support a linear or ring topology. The Ex-zone 2 approval matters in wastewater head-works where methane may be present. Signal-intensity LEDs on each channel simplify link-budget verification in field commissioning - a key advantage over copper where intermittent faults only manifest after weeks of operation. Compared with a hardwired RS-485 only backbone, fiber eliminates ground-loop currents from dissimilar earthing systems between remote pump stations.
Recommended
Fiber PROFIBUS Link in Substation and Power-Utility Networks
The OZD PROFI 12M G12 PRO supports PROFIBUS DP extension into electrical substation environments, where high-voltage switchgear and large transformer Earth-potential rises would otherwise destroy a copper PROFIBUS pair. Its fiber-optic conversion provides total galvanic isolation, and the repeater function maintains PROFIBUS DP-V1/DP-V2 timing for SCADA-controlled IEDs. The 850 nm VCSEL transceivers with multimode glass fiber connect cleanly into existing OPGW/ADSS-style fiber that utilities already run between substations. Sub-D 9-pin connector per EN 50170 part 1 supports plug-and-play interop with standard PROFIBUS DP master / slave devices. Compared with industrial Ethernet gateways, PROFIBUS remains the dominant fieldbus in many legacy substation IEDs, making a PROFIBUS fiber repeater more practical than a full-protocol migration for fiber extension.
Recommended
Recommended Products Summary
Engineering reference data for OZD PROFI 12M G12 PRO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OZD PROFI 12M G12 EEC PRO | OZD PROFI 12M G11 PRO | OZD PROFI 12M G12-1300 PRO | OZD PROFI 12M G11-1300 PRO | OZD PROFI 12M G11 EEC PRO |
|---|---|---|---|---|---|---|
| Brand | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann | Belden / Hirschmann |
| Package / Mechanical Form Factor | DIN-rail enclosure (matches OZD Profi 12M family) | Same DIN-rail form factor | Same DIN-rail form factor | Same DIN-rail form factor | Same DIN-rail form factor | Same DIN-rail form factor |
| Fiber Type | Quartz glass multimode (50/125 µm, 62.5/125 µm) | Quartz glass multimode (same) | Plastic optical fiber (POF) | Quartz glass (longer reach variant) | Plastic optical fiber (1300 nm POF) | Plastic optical fiber (POF) |
| Optical Wavelength | 850 nm (VCSEL) | 850 nm (same) | 650 nm (typical for POF) | 1300 nm | 1300 nm | 650 nm (POF, EEC) |
| Optical Ports | 2 x BFOC 2.5 (STR) | 2 x BFOC 2.5 (same) | 2 x BFOC 2.5 (same) | 2 x BFOC 2.5 (same) | 2 x BFOC 2.5 (same) | 2 x BFOC 2.5 (same) |
| Electrical Port | 1 x Sub-D 9-pin female (EN 50170 part 1, PROFIBUS) | Same Sub-D 9-pin EN 50170 | Same Sub-D 9-pin EN 50170 | Same Sub-D 9-pin EN 50170 | Same Sub-D 9-pin EN 50170 | Same Sub-D 9-pin EN 50170 |
| PROFIBUS Protocol Support | DP-V1, DP-V2, FMS (per IEC 61784 ED.1:2002 CPF3/1 / EN 50170 part 1) | Same DP-V1 / DP-V2 / FMS | Same DP-V1 / DP-V2 / FMS | Same DP-V1 / DP-V2 / FMS | Same DP-V1 / DP-V2 / FMS | Same DP-V1 / DP-V2 / FMS |
| Operating Temperature | 0°C to +60°C (standard) | Extended range with conformal coating (EEC) | 0°C to +60°C | 0°C to +60°C | 0°C to +60°C | Extended range with conformal coating (EEC) |
| Hazardous Location Approval | Ex-zone 2 / Class I Div 2 | Ex-zone 2 / Class I Div 2 | Ex-zone 2 / Class I Div 2 | Ex-zone 2 / Class I Div 2 | Ex-zone 2 / Class I Div 2 | Ex-zone 2 / Class I Div 2 |
| Mounting | 35 mm DIN-rail | 35 mm DIN-rail (same) | 35 mm DIN-rail (same) | 35 mm DIN-rail (same) | 35 mm DIN-rail (same) | 35 mm DIN-rail (same) |
Key Differentiators
- 850 nm VCSEL transceivers optimized for low-loss links on quartz glass fiber (G12 vs G11 series) (vs OZD PROFI 12M G11 PRO)
- No conformal coating needed for standard indoor cabinet use (vs EEC variant) (vs OZD PROFI 12M G12 EEC PRO)
- Quartz glass multimode fiber vs 1300 nm single-mode variant (G12-1300) (vs OZD PROFI 12M G12-1300 PRO)
Design Notes
Do NOT connect the OZD PROFI 12M G12 PRO to plastic optical fiber (POF) cables - the device's optical transmit power is tuned for quartz glass multimode fiber, and the high launch power can overdrive the receiver of non-OZD Profi POF equipment, especially on short cable runs (<50 m). For POF applications use the OZD PROFI 12M G11 PRO instead. Always verify fiber media with the Hirschmann/Belden manual before field installation, and configure the optical operating mode via DIP switch to match the actual cable plant.
When integrating the OZD PROFI 12M G12 PRO into a mixed network with older OZD Profi 12M...c devices or with OZD Profi PRO pre-revision hardware, configure functional-compatibility DIP switch S8=0 to disable certain auto-detection features - the devices are then directly compatible per the Hirschmann 2020 installation manual release 06. When the network consists only of new OZD Profi 12M PRO/b devices, the default S8=1 (auto-detect) is acceptable. Leaving S8 in the wrong position is a common cause of intermittent bus errors after a partial-fleet upgrade.
Terminating resistors on PROFIBUS segments must be enabled at exactly two endpoints and disabled everywhere else - on the OZD PROFI 12M G12 PRO, this is set via DIP switch S0 (and related bits) for the electrical segment. Leaving terminating resistors enabled in the middle of a segment reflects the bus signal and causes intermittent errors that look like EMI. Verify the S0/S1 DIP-switch settings match the physical location of the device in the segment topology before powering up.
The OZD PROFI 12M G12 PRO is rated for 0°C to +60°C ambient - well within the standard industrial-cabinet range but unsuitable for outdoor enclosures in direct sunlight or for cold-mounting below freezing without heater provisions. For humidity / conformal-coating protection in washdown areas (food & beverage, marine decks), choose the OZD PROFI 12M G12 EEC PRO which adds conformal coating and an extended temperature/humidity range per the Belden datasheet. Allowing maximum rated temperature inside a sealed cabinet requires derating the cabinet or adding forced-air cooling.
Compliance Information
RoHS, REACH, and lead-free status were not stated in the retrieved web data and require confirmation against the Belden/Hirschmann declaration of conformity. The device is IEC 61784 ED.1:2002 CPF3/1 compliant and approved for Ex-zone 2 / Class I Division 2 hazardous locations. AEC-Q100 is not applicable (industrial PROFIBUS, not automotive). For automotive PROFIBUS extensions, an AEC-qualified PROFIBUS media converter would be required instead.