FFBH GC-1201S two master and one slave RS485 repeater photoelectric isolation Modbus Dual Host Hub Q3P9R

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We hope you enjoy shopping with us!Product Details:Model 1：Two masters one slave GC-1201S Model 2：Two masters one slave GC-1201S+12V power supply  Model 3：Two masters one slave GC-1201S+USB to 485 module Model 4：Two masters one slave GC-1201S+12V power supply+USB to 485  Model 5：Two masters one slave GC-1201S+24V power supply Model 6：Two masters one slave GC-1201S+Lvlian USB to 485/422  Model 7：Two masters one slave GC-1201S+24V power supply  Model 8：Three masters one slave module GC-1201S+Standard line Model 9：Two masters one slave GC-1201S+Brand switching power supply  Resolve data conflicts when two masters communicate with one or more slavesThe communication between two 485 master stations and one or more slave stations requires an additional cache 485 hub Hub can automatically switch two master stations to communicate with slave stations to avoid communication failure caused by data conflict Product introductionGC-1201 two-way buffer isolated RS485 hub is a communication device that supports two-way RS485 master station equipment and one or more RS485 slave station equipment. It is used to solve the problem of communication conflict when two master stations communicate with slave stations at the same time. Master station 1 queries slave station data will only return to master station 1 but not to master station 2. Master station 2 queries slave station data will only return to master station 2 but not to master station 1. Photoelectric isolation technology is adopted between the interface of master station and slave station to protect the equipment of master station from interference. The circuit is designed with 15KV ESD protection and 5KA lightning surge protection devices, which can effectively isolateHarm of Lightning Static Electricity to Equipment Each of the three communication interfaces has a communication indicator lamp, which can visually see the state of each communication port The communication format and baud rate of transparent data transmission between master station and slave station interface can be set by softwareThis product is suitable for automatic control system, monitoring system, alarm access control system, IC card charging, meter reading, one card parking lot charging and other comprehensive RS485 communication system Functional characteristicsThe power supply input DC9-36V has overcurrent and reverse connection protectionSupport communication between two RS485 master station devices and one or more RS485 slave station devicesBaud rate communication format can be setThe signal interface has electrostatic lightning surge protectionCommunication and power supply are completely isolated between master and slave station interfacesThe baud rate of 32-bit MCU and high-speed optocoupler can reach 115200The slave station communication port supports up to 120 nodes Product parametersModel: GC-1201Interface characteristics: compatible with EIATIA RS - 485 standardTransmission medium: twisted pair or shielded wireWorking mode: asynchronous half-duplex (RS-485 two-way communication)Communication protocol: transparent transmission without protocol restrictionCommunication format: check bit of standard communication format is optionalWorking power supply: 9 - 36VDCStatic power consumption: 0.6WSignal indication: four indicators, status (STA), slave station (SLA), master station 1 (MA1), master station 2 (MA2)Isolation degree: isolation voltage 2500Vrms 500VDC continuous, built-in DC/DC moduleBaud rate: 1200bps-115.2KbpsProtection grade: 600W lightning surge protection for each line of RS-485 interface at both ends,+15KV ESD protectionTransmission distance: 0-3000 meters (115200bps-9600bps)Product size: 98x50x31mm (including both ends)Operating environment: - 40 ° C to 85 ° C, relative humidity 5% - 95%  Communication speed1. First of all, it is explained that the communication speed is mainly related to baud rate and data length:The higher the baud rate, the shorter the data length and the faster the communication speed; On the contrary, the slower the speedIn addition, it also depends on the response speed of the slave station. The faster the response speed of the slave station, the higher the overall communication speed will be2. Using MODBUS protocol to read 11 registers at 9600 baud rate as an example:Host computer query instruction01 03 00 00 00 0b 04 0dLower computer response instruction01 03 16 00 D7 00 6F 00 63 00 42 00 3700 60 00 23 00 4E 00 42 00 60 00 02 A8 D8As shown in the figure, the sampling picture measured by oscilloscope can be(1) The whole communication process takes about 100ms(2) The time consumption of module forwarding (one receiving and one sending) is about 38ms Troubleshooting1PCB is not powered on, indicator light is not on, check whether the power cord is connected correctly, whether the positive and negative poles are connected, reverse use multimeter to measure whether the power supply voltage is correct, and the red indicator light on the PCB will always be on after troubleshooting2 Unable to communicate check whether the communication port 485 line is connected backwards. Each communication channel should have an indicator light to receive correct data. The indicator light flashes. If there is no flashing, check whether the communication format and baud rate of the hub are consistent with the master station and slave station. If it is impossible to determine, the parameters can be reset to restore the default value