Key Parameters 1. Core Function: Device Type: Two-Way, Two-Port, RS-485 Repeater/Isolator. Purpose: Regenerates digital signals, provides galvanic isolation, and allows network segmentation to extend range and increase the number of allowable nodes on an RS-485 network. 2. Isolation & Protection (Critical Feature): Galvanic Isolation: Isolation Rating: 1500V RMS (1 min) between all ports (Side A, Side B) and the power supply. Benefit: Breaks ground loops, prevents noise coupling, and protects sensitive control equipment from transient surges or faults originating in field wiring. Intrinsic Safety (IS) Considerations: While not itself an intrinsically safe barrier, it is commonly used to provide isolation between a non-hazardous area control room and an IS-rated RS-485 network in a hazardous area, when used in conjunction with appropriate IS isolators (like MTL 5050 series). 3. Electrical Specifications (RS-485 Data Ports): Standard: EIA/TIA-485 (RS-485). Number of Ports: 2 (designated Side A and Side B). Each side can connect to a separate segment of the network. Data Rate: Up to 460 kbps. Termination & Bias: Includes user-selectable termination resistors (120Ω) and fail-safe biasing resistors for each port via internal DIP switches. This is crucial for ensuring reliable communication. Connections: Screw terminals for Data+, Data-, and Ground/Shield for each port. 4. Network Enhancement: Segment Extension: Effectively doubles the maximum cable length of a single RS-485 segment (typically 1200m at lower speeds) by regenerating the signal. Node Increase: Increases the maximum number of addressable units (typically 32 per segment) by creating two separate electrical segments. Wiring Topology: Helps convert a problematic "multi-drop" bus into a more reliable "star" or segmented topology. 5. Power Supply: Supply Voltage Range: 20 - 30V DC (24V DC nominal). Power Consumption: Low, typically < 3W. Connection: Removable screw terminal block. Reverse Polarity Protection: Yes. 6. Diagnostics & Indicators: LED Status Indicators: PWR (Green): Power OK. TxA / TxB (Yellow): Data transmission activity on Side A and Side B. Fail (Red): Indicates a fault condition (e.g., loss of signal, short circuit). No Software Configuration Required: Operation is set via physical DIP switches for termination and bias. 7. Mechanical & Environmental: Mounting: Standard 35mm DIN rail (EN 60715). Enclosure Material: High-impact polycarbonate (black, as per BLK suffix). Protection Degree: IP20 (for mounting inside an enclosure). Operating Temperature: -20°C to +60°C. Ambient Humidity: 0 - 95% RH (non-condensing). 8. Certifications & Approvals (Typical for MTL Line): ATEX / IECEx: Certified for use in Non-Hazardous (Safe) Areas only. (For hazardous areas, it must be mounted in a safe area or within an approved enclosure). CE Marked. UL Listed. CULus Listed. 9. Typical Applications: Extending and isolating MODBUS RTU (RS-485) networks in industrial plants. Segmenting large process control networks (DCS, SCADA) in oil & gas, water treatment, and chemical plants. Isolving ground loop problems between different buildings or equipment grounds. Protecting PLC and control system COM ports from field-side electrical noise and transients.