Feature: 1. Input Signal: 4 input ports, supports up to 115,200bps, selectable auto manual switching by external switch, selectable primary secondary input by external switch. 2. Safe Operation: The marine serial line splitter supports over voltage protection, over current and surge voltage protection, reverse input and over current protection. 3. Practical: There are wiring instructions at the wiring area to prevent wiring errors, and pluggable screw terminals for quick and easy installation and diagnostics. 4. Design: Galvanic isolation of Each output group, input, main circuits and power, selectable RS232, RS422, TTL on 8 output port. 5. Durable Material: Made of aluminium alloy shell, anti rust treatment, will not be oxidized and corroded by seawater or air, long term durability. Specification: Item Type: Marine Serial Line SplitterMaterial: Aluminium alloyInput Signal: 4 input ports, galvanic isolation, supports up to 115,200bps, selectable auto manual switching by external switch, selectable primary secondary input by external switch8 Way Output Ports: Support RS232/RS422/ TTL Signal(Selectable by jumper) Input Port: Over Voltage Protection(DC 36V 1 min) Output Port: Over Current and Surge Voltage Protection Input Power: Reverse Input and Over Current Protection Input Power: DC 24V (DC 18~32V), 0.5A（Electronic Fuse, No Replacement Required） Temperature: -0.5°C ~ +55°C(-59℉~131℉) Humidity: 95%. Package List: 1 x Marine Serial Line Splitter