Introduction of RS232 to RS485/RS422 bidirectional communication protocol converter H105
The bidirectional communication protocol converter H105 is compatible with RS-232C, RS-422, and RS-485 standards, and can convert single-ended RS-232 signals into balanced differential RS-422 or RS-485 signals, with built-in fast transient voltage suppression protector , This protector is designed to protect the RS-422/RS-485 interface. It adopts today's advanced TVS (TRANS IENNT VOLTAGE SUPPERSSOR) transient voltage suppressor. Under normal circumstances, the TVS tube is in a high resistance state. When the TVS tube ends When subjected to an instantaneous high-energy shock, it can reduce the impedance at both ends at a very high speed and absorb a large current, thereby clamping the voltage at both ends to a predetermined value, protecting the following circuit components from transients. Damaged by high pressure impact. This protector can effectively suppress lightning (LIGHTNING), providing 600W lightning surge protection power per line, as well as surge voltage and transient overvoltage generated on the line due to various reasons. And the extremely small interpole capacitance ensures the high-speed transmission of the RS-422/RS-485 interface. The RS-232 interface is connected to a standard interface compatible with RS-232C through a DB9 female connector, and the RS-422 and RS-485 ports are connected through a DB9 male connector.
The two-way communication protocol converter H105 has zero-delay automatic transceiver conversion inside, and the unique I/O circuit automatically controls the data flow direction without any handshake signals (such as RTS, DTR, etc.), and does not need jumper settings to achieve full dual It can be switched between the two modes of RS-422 and half-duplex (RS-485), and it is plug and play to ensure that it is suitable for all existing communication software and interface hardware, and it does not need to modify any software based on the previous RS-232 working mode.
RS232 to RS485/RS422 bidirectional communication protocol converter H105
Two-way communication protocol converter H105 can provide reliable connection for point-to-point, point-to-multipoint communication, each point-to-multipoint converter can connect 32 RS-422 or RS-485 interface devices, and the data communication rate is 300 -115, 2KBPS, with power indicator and data flow indicator to indicate fault conditions, supported communication methods are RS-232 to RS-422, RS-232 to RS-485 conversion
RS232 to RS485/RS422 bidirectional communication protocol converter H105 performance parameters
01、Interface features: The interface is compatible with EIA/TIA RS-232C, RS-485/RS-422 standards
02、Electrical interface: RS-232 interface input DB9 female connector, RS-422/RS-485 interface output DB9 pin type, RJ-45 connector
03、Protection level: lightning surge protection of 600W per line for RS-422 and RS-485 interfaces
04、Working mode: asynchronous half-duplex or asynchronous full-duplex
05、Signal indication: three signal indicator lights power (PWR), transmit (TXD), receive (RXD)
06、Transmission medium: twisted pair or shielded wire
07、Transmission rate: 115.2K BPS to 300M; 38.4K BPS to 2.4KM; 9600 BPS to 5KM
08、Dimensions:97mmX65mmX26mm
09、Operating environment: -25°C to 70°C, relative humidity 5% to 95%
10、Transmission distance: 0~5000 meters（115200bps~9600bps）
RS232 to RS485/RS422 bidirectional communication protocol converter H105 wiring signal description
RS-232C pin assignment and RJ-45 socket pin assignment diagram
RS-485/RS-422 output signal and terminal pin assignment
RS-485/RS-422 output signal and wiring terminal pin assignment diagram
The bidirectional communication protocol converter H105 adopts the DB-9/DB-9 universal connector as the input/output interface. It can automatically realize the RS-485 or RS-422 communication mode without jumper setting. It can use twisted pair or shielded wire to connect, Disassembly is very convenient. T/R+T/R- stands for transmitting and receiving A+/B-, RXD+/RXD- stands for receiving A+/B-, VCC stands for input or output power, GND stands for common ground, point-to-point, point-to-multipoint, Half-duplex communication is connected to two lines T/R+, T/R-, point-to-point, point-to-multipoint, full-duplex communication is connected to four lines T/R+, T/R-, RXD+, RXD-
Four communication methods supported by RS232 to RS485/RS422 bidirectional communication protocol converter H105
01、Point-to-point/four-wire full duplex
02、Point-to-multipoint/four-wire full duplex
03、Point-to-point/two-wire half-duplex
04、Point-to-multipoint/two-wire half-duplex
Note: When the converter H105 is used as a full-duplex or half-duplex wiring, in order to prevent the reflection and interference of the signal, a matching resistor should be connected to the end of the line (the parameter is 120 ohms 1/4W)
RS232 to RS485/RS422 bidirectional communication protocol converter H105 communication connection diagram
RS-422 point-to-point/four-wire full-duplex communication
Schematic diagram of RS-422 point-to-point/four-wire full-duplex communication connection
RS-422 point-to-multipoint/four-wire full-duplex communication
Schematic diagram of RS-422 point-to-multipoint/four-wire full-duplex communication connection
RS-485 point-to-multipoint/two-wire half-duplex communication
Schematic diagram of RS-485 point-to-multipoint/two-wire half-duplex communication connection
Full-duplex communication connection between converters
Schematic diagram of full-duplex communication connection between converters
RS232 to RS485/RS422 bidirectional communication protocol converter H105 fault and troubleshooting
01、Data communication failed
A、Check whether the RS-232 interface wiring is correct
B、Check whether the RS-485/RS-422 output interface wiring is correct
C、Check whether the power supply is normal
D、Check if the terminals are well connected
E、Watch to see if the receive light blinks when receiving
F、Watch to see if the send light blinks when sending
02、data loss or error
A、Check whether the data rate and format of both ends of the data communication device are consistent