Overview

Model 4045-CC High-Speed Ruggedized ST Fiber-to-RS422 Interface Converter, Conformal Coated

The Model 4045-CC High-Speed ST Fiber to RS-422 Interface Converter enables reliable, long-distance serial communications by converting RS-422 electrical signals into optical transmission over multimode fiber. Designed for industrial and mission-critical environments, the 4045-CC delivers high-speed data throughput, complete electrical isolation, and rugged reliability, even in electrically noisy or harsh operating conditions. By moving serial data onto fiber, the 4045-CC eliminates ground loops, suppresses EMI/RFI interference, and dramatically extends communication distances beyond the limits of copper cabling — without requiring changes to existing serial devices.

• High-Speed Serial over Fiber - Ruggedized for Industrial Use

• Conformal Coated PCB to Limit Effects of Environmental Exposure

• Extend, Protect, and Harden Your Serial Communications

FEATURES OF THE MODEL 4045CC RS422 TO ST FIBER CONVERTER:

• Model 4045-CC converts ST Duplex Fiber to Copper RS422 DB9 (F) port.
• Supports constructing an optically isolated high-speed communication link between connected devices.
• Typical operating speeds are up to 12.6 Mbps for RS422 to fiber conversion.
• Provides full galvanic isolation (no metallic connection) between connected devices.
• LED Status indicators display Fiber RX, TX activity and power indication.

TYPICAL APPLICATIONS FOR THE MODEL 4045-CC ST FIBER TO RS422 INTERFACE CONVERTER:

• Factory Automation & Machine Control — Connect PLCs, robots, CNC equipment, and motion controllers across noisy industrial environments.
• Power & Utilities — Provide isolated serial links between control rooms, substations, and field equipment.
• Transportation & Infrastructure — Support signaling, monitoring, and control systems in rail, traffic, and airport installations.
• Distributed Data Acquisition — Link remote sensors, meters, scanners, and test equipment over long distances.
• Legacy System Modernization — Integrate older RS-422 devices into fiber networks without replacing existing hardware.

WHY CHOOSE THE MODEL 4045-CC RS422 TO ST FIBER OPTIC CONVERTER FOR YOUR NETWORK?

• High-Speed Serial over Fiber
  Supports full-duplex RS422 data rates up to 12.6 Mbps, making it suitable for demanding real-time control and data acquisition applications.
• Noise-Immune Optical Isolation
  Fiber optic transmission provides complete galvanic isolation between connected devices, protecting sensitive equipment from electrical noise, voltage spikes, and ground potential differences.
• Extended Communication Distance
  Transmit RS-422 data over multimode fiber across long distances where copper cabling would suffer from attenuation, interference, or signal degradation.
• Ruggedized for Industrial Use
  Conformal coating on internal circuitry protects against humidity, dust, and corrosive contaminants — ideal for factory floors, power facilities, transportation systems, and outdoor enclosures.
• Simple, Transparent Integration
  No software or drivers required. The converter operates transparently to connected devices, allowing legacy serial equipment to work seamlessly over modern fiber infrastructure.

Model 4045-CC High-Speed Ruggedized Fiber RS422 Converter Block Diagram.

SPECIFICATIONS:

Fiber Interface:

• Connectors: Fiber Optic ST Female, Multimode
• TX Power: -14 dBm with 62.5/125µm Fiber 
• RX Sensitivity: -24 dBm with 62.5/125µm Fiber
• Optical Budget: 10 dB
• Max. Link Distance with 62.5/125µm Fiber:
• 2 kM at up to 12.6 Mbps
• Wavelength: 850 nm, multimode
• Fiber Size: 50/125 µm, 62.5/125 µm, 100/140 µm.

Copper Interface:

• Connectors: DB9, Female
• Type: RS422 (4-wire)

Bit Rate (nom.):

• RS422: 0 to 12.6 Mbps

Network Configurations:

• RS422   Point-to-Point

Indicators:

• (1) Red: Fiber RCV (RX Data)
• (1) Yellow: Fiber XMT (TX Data)
• (1) Green: Power Indicator

Power:

• Input Power: (8-32 VDC) 28VDC (Nominal).
• Connectors: DB9F, Pin 1 ( 28V), Pin 5 (GND)
• Customer Supplied power to unit via DB9(F) connector.

Model 4045 Mechanical (Desktop Unit):

• Model 4045-CC, Cat No: 304045-CC
• Size: 2.36" x 1.77" x 0.95" (6.0 cm x 4.5 cm x 2.4 cm)
• Weight: 0.2 lb. (74g)

Model 4045-CC has a Conformal Coated Printed Circuit Board (PCB) for military and harsh environments

 MODELS 4165, 4165-DIN, or 4166 to MODEL 4045-CC APPLICATION:

Isolated PC/Host USB (Copper) to Multimode Fiber Link (Glass Fiber) to DB9 (Copper) to RS422 Serial Interface / Network. (Models 4165 or 4166 to Model 4045-CC)

MODEL 4045-CC to MODELS 4152 or 4153 APPLICATION:

From a Controller RS422 to Multimode Fiber Link (Glass Fiber) to DB9 (RS485/422/232) (Copper) to a PC/Terminal. (Model 4045-CC to Models 4152 or 4153)

MODEL 4045 to MODEL 4179 APPLICATION (RS422 to Multimode Fiber to (POF) Fiber):

From a Controller to ESL Model 4045-CC RS422 (Copper) to ST Fiber to ESL Model 4179, SC Fiber (Glass Fiber, Multimode Fiber Link) to POF Fiber (Plastic Optical Fiber, Versalink).

Ordering Information

• Catalog Number:304045-CC
• Model Number:4045
• Base Price: See website or contact us for current pricing and availability.

Documentation & Support

• Specification Sheet (PDF) Download Available.
• Product Manual available upon request. 
• For custom fiber optic network switch requirements contact our sales support team 401-943-1164 or email eslab@electrostandards.com
• We welcome international inquiries and ship worldwide.

Shipping and Returns           

• Shipped via UPS ground (unless otherwise requested).
• Freight Charges prepaid and added to invoice. We can estimate freight charges for you.
• Return policy: contact us within 30 days of shipment for an RMA number. Items returned without RMA not accepted. Please refer to our full return policy in our Terms and Conditions found on our website.

To view more of Electro Standards' Media Converters, click here: Interface Converters.

Electro Standards can supply all your Network Cable requirements. Click here to reach our CABLES, CONNECTORS/ADAPTERS Webpage.

For custom network interface converters call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our online form: /Products-Custom/Copper-Switch/

All data switches, data communication products, and data acquisition products are subject to a one year warranty against manufacturing defects.  The limit of ESL liability is limited to the cost of the ESL product provided.

*Prices online are subject to change and verification.

All ESL products are available for export.