Product Overview
The OPTONE Serial-to-Fiber Media Converter (OPT-277 Series) is a robust, industrial-grade optical transceiver designed to extend standard RS-232, RS-485, or RS-422 serial communications over long-distance fiber optic links. Featuring a versatile 3-in-1 serial interface design (supporting RS-232, RS-485, or RS-422 protocols independently), this device eliminates signal degradation and electromagnetic interference (EMI/RFI).
Engineered for reliability in harsh industrial environments, the OPT-277 series features automatic baud rate detection with zero delay time, plug-and-play simplicity, 15KV ESD protection, and 600W surge protection. Capable of extending serial transmission from 2km over multi-mode fiber up to 120km over single-mode fiber, it is the ideal choice for industrial automation, SCADA systems, and power substation monitoring.
Key Features & Benefits
3-in-1 Serial Compatibility: Supports RS-232, RS-485, and RS-422 interface types in a single unit (one active connection used at a given time).
Automatic Rate Detection & Zero Delay: Automatically examines signal speed and baud rates with zero delay time, ensuring seamless asynchronous point-to-point or multi-point communication.
Industrial-Grade Surge & ESD Protection: Equipped with 600W surge protection and 15KV ESD protection, safeguarding sensitive serial equipment against electrical transients.
Long-Distance Extension: Effectively bridges serial gaps, extending communication distances from 2km (multi-mode fiber) up to 120km (single-mode fiber).
Plug-and-Play Simplicity: Fully self-adjusting with data format auto-sensing, requiring no manual software configuration or dip-switch settings.
Rugged Compact Design: Housed in a durable metal enclosure with an extended operating temperature range, built specifically for harsh industrial deployments.
Technical Specifications
| Category | Specification Details |
|---|---|
| Serial Interface Ports | 1 x RS-232 / RS-485 / RS-422 (Selectable, one active at a time) |
| Optical Port (Fiber) | 1 x 100Base-FX (1×9 transceiver design) |
| Supported Serial Standards | EIA RS-232C, RS-485, RS-422 standards |
| Working Modes | Asynchronous, point-to-point or multi-point, 2-wire half-duplex / 4-wire full-duplex |
| Baud Rate & Speed | 0 ~ 115.2 Kbps (Auto-detect rate, zero delay) |
| Transmission Distance | RS-485/422 side: up to 1.2km (at 9600bps) | RS-232 side: no less than 5m | Fiber side: up to 120km |
| Max Nodes (RS-485/422) | Up to 128 nodes |
| Port Protection | 600W Surge Protection, 15KV ESD Protection |
| Power Requirement | Input: 5V DC | Current Consumption: 120mA |
| Dimensions & Weight | 100 x 69 x 22 mm (L x W x H) | Weight: 230g |
| Housing Material | Rugged Metal Enclosure |
| Environmental Limits | Operating Temp: -10°C to 60°C | Storage Temp: -40°C to 85°C | Humidity: 5% to 95% RH (Non-condensing) |
Ordering Information & Model Selection
| Part Number | Description/Fiber Mode | Max Distance | Power Requirement | Optical Connectors |
|---|---|---|---|---|
| OPT-277M | Multi-Mode Serial-to-Fiber Converter | 2 km | 5V DC | SC, FC, or ST optional |
| OPT-277S | Single-Mode Serial-to-Fiber Converter | 20 km (up to 120km opt.) | 5V DC | SC, FC, or ST optional |
Frequently Asked Questions (FAQ)
Q1: Can I connect an RS-232 device and an RS-485 device at the same time?
No. The OPT-277 series supports RS-232, RS-485, and RS-422 interface types, but only one serial port can be connected and used at any given time.
Q2: Do I need to manually configure the baud rate or data format?
No configuration is required! The converter features plug-and-play operation with auto-sensing and self-adjusting data formats, automatically detecting serial signal speeds with zero delay time.
Q3: What kind of protection does this converter offer against lightning or power surges?
The unit is built with robust industrial protection, featuring 600W surge protection and 15KV ESD protection on the serial ports to prevent damage from electrostatic discharge and electrical transients in harsh industrial environments.