Easy setting using supplied software (or via terminal) over a USB interface (new).Automatic direction control with no delay.Enhanced overvoltage protection for both lines.Optionally, second galvanic isolation of both lines from the power supply ground.The RS485/422 line (including the grounding) is completely isolated from USB and from the power supply (this isolation is provided as standard for all types).Complete signal reconstruction (depending on the mode).Second galvanic isolation of both lines from power GND (optional).Complete galvanic isolation (including the GND) of both lines from each other and from power circuits.Or you can convert RS485 to RS422 and vice versa while isolating those two. According to set-up you can have RS485 or RS422 isolator/repeater. Both interfaces are completely isolated from each other. When the device is not galvanic isolated from the power supply (against ground loops).ĬQ485 has two communication interfaces - each of those can be configured as: RS485, RS422 or RS422 multimaster.In case you use star connection (line is not connected as a bus) you need to isolate far points of the star.Although those lines are very rugged and can run as far as 1200m, sometimes you need a repeater or an isolator. Lines RS485 and RS422 are often used in Industry. Where is this Isolator / Repeater needed? It features 12 user-selectable data rates from 300 bps up to 460.8 kbps.CQ485 is an RS485 and RS422 repeater, converter and isolator in one device. You get the speed with the RS-422 and RS-485 Optical Isolator/Repeater too. By connecting one side of the unit as a 2-wire device and one side as a 4-wire device equipment meant for a point-to-point RS-422 interface can be connected directly to an RS-485 2-wire multidrop system. The RS-422 and RS-485 Optical Isolator/ Repeater operate in either 2-wire half-duplex systems or in 4-wire half-duplex or full-duplex systems. It supports Transmit Data A and B Receive Data A and B Protective Ground and Signal Ground. The RS-422 and RS-485 Optical Isolator/Repeater use terminal blocks on each side of the device. All data lines as well as power and ground are isolated from one side of the unit to the other.
It can be used to optically isolate one piece of RS-485 equipment from the rest of an RS-485 system or one local group of RS-485 equipment from another or it can be used as a repeater to expand an existing RS-485 system beyond the standard's 32-node limitation. The BLACK BOX(r) RS-422 and RS-485 Optical Isolator/Repeater enable you to connect equipment meant for a point-to-point RS-422 4-wire interface to an RS-485 2-wire multidrop system. This compact device links RS-422 4-wire and RS-485 2-wire systems while using optical isolation to protect equipment and lines from damaging ground loops. Features 12 user-selectable data rates up to 460.8 kbps. Operates 2-wire half-duplex or 4-wire half- or full-duplex. It can be used as a repeater to expand an RS-485 system beyond 32 nodes. Connects point-to-point RS-422 4-wire equipment to an RS-485 2-wire multidrop system. Isolates one RS-485 device from the rest of an RS-485 system or one local group of RS-485 equipment from another. The optical repeaters/isolators add 4,000 feet (1.2 km) and another 32 nodes to an RS485 data circuit.
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