1. summary 3.interface definition 3.RJ-45interface
Contents
1. and the controlled end equipments are of RS 422 port and need to be Q 1 4W 2 Loss of data and unread able charact ers connected to several RS 422 equipments RS 422 from RS 422 SLAVE see if the data velocity of the communication equipments of the 2 from 32 to128 at most In order to prevent the reflection and disturbance of ends accord with each other signals users need to install terminal impedance matching resistance at the matching resistance could be added 1200 1 4W end of the line 120Q 1 4W S RS 485 3 poor capability of long distance communication equipment see if the twisted pair are twisted evenly if the marked transmission impedance is 120Q add twisted pair of 120 Q impedance with screen when necessary STM 8522B RS 422 RS 485 see if too many equipments are linked to BUS switch equipment equipment and if more terminal impedance matching resistances need to be RS 422 added to the 2 end equipments on BUS 120Q 1 4W STM 8522B RS 232 equipment check if the communication velocity is too high users should switch equipment always use communication of low velocity when making long distant STM 8522B communication switch equipment2. of RS 422 RS 485 cable circuitry will try to send power to the ground line through the port because of the diffrent electric features the 2 ends can t host STM 8522B D A fener path of minimum resistance so the interface parts of an apparatus are be connected directly without an interface adapter According to PC switch D B saupi easily get damaged Therefore in order to have the safe good the following chart when users make the connection communication users should pay attention to make the good grounding ofthe hull ofthe equipment 6 trouble shooting RS 232 RS 485 point to multi point 2 line semiduplex communication i Tis 1 Unsuccess ful data trans fer STM 8522B RS 422 mode is mainly used on host computers of RS 232 port the controlled end see if the RS 232 port is correctly linked switch Communication equipments are of RS 485 port and need to be connected to several RS 485 see if the RS 485 RS 422 port is correctly linked equipment equipments RS 485 from RS 485 SLAVE from 32 tol28 at most In check RS 232 if the voltage is between 5V 12V when the RS 232 RS 422 point to multi point 4 line 4 line asynchronous whole duplex order to prevent the reflection and disturbance of signals users need to interface signal TXD DTR RTS is 1 and if the voltage is communication This mode is mainly used on host computers of RS 232 port install terminal impedance matching resistance at the end of the line 120 between 5V 12V when signal is 0
3. 0bps 8 transmission distance 0 1800 metres 9 size 93mmX23mmX62mm 10 use environment 0 C 60 C relative humidity 5 95 11 connecting capability 32 128 equipments 3 interface definition 1 RS 232 interface definition DB9 socket RS 232 DCD TXD RXD DTR GND DCE 2 RS 485 RS 422 interface definition the numbers of the connection pins on the connection platelet are the same as DB9 plug mm gt s oe 422 send send receive receive GND definition minT posT posR minR 485 485min 485pos GND definition D B D A RJ 45 plastic plug 3 RJ 45interface definition RJ 45 2 3 4 socket 422 send send receive receive define posT min T posR minR 485 485pos 485 min define DHA D B Additional RJ 45 plug definition bead Male Female RJ 45 socket 4 usage Please read the manual carefully before using First install the product Firmly then connect cable DB9 plug of standard fittings to the RS 232 port of the product connect DB9 socket to the RS 232 port of the controlling host computer RS 485 RS 422 port must be connected to RJ 45 or 6 hole connection port and then connect RS 485 RS 422 equipments according to the corresponding interface definition Lastly connect the power adapter to the 9V socket and switch on the power The product support the following communication modes lpoint to point 4 line whole duplex RS 422 mode 2point to multi point 4 li
4. RS 232 to RS 485 RS 422 interfaced converter Switch Manual 1 summary STM8522B is a multifunctional interfaced converter changing RS 232 to RS 485 RS 422 interface This product is compatible with the standard of RS 232 RS 485 RS 422 It can change the single ended signal of RS 232 to the balanced signal of RS 485 or the difference signal of RS 422 RS 232 interface is connected to the serial port of computer by a DB9 socket RS 485 RS 422 plug is connected to the hexad connection pins on the terminal board through DB9 pinhead Owing to RS 485 s ability of supporting dual lined semiduplex that is to say RS 485 has only one pair of difference circuitry sending and receiving data users often make the proper communication protocols to control sending receiving directions through controlling RIS signals from serial port modem The inside circuitry of STM 8522B interfaced switch can apperceive the direction of the data stream and switch the control of sending receiving automatically So it can be made into a convenient RS 485 network and there is no need for software to compile complicated ever changing RTS signals to control the direction of sending receiving This control is transparent The former softwares which are based on RS 232 connection fashion needn t to be changed in any way The external power supply of this product has the features of small size distant transmission high velocity stable performance etc The adopted RS 232 RS 485
5. RS 422 interfaces are self adapted interfaces so there isn t any need to set up softwares or hardwares For this feature they are widely used in work attend ance checking machines IC card charging systems industrial automation control systems card passing door systems parking lot systems automating banking systems public automobile charging systems dining hall meal selling systems high way toll station system etc Standard fittings A manual A RS 232 communication cable DB9 plug to DB9 socket GA hexad connection platelet A 9V power adapter A RJ 45 plastic plug www sintech cn 2 capability parameters l interface features compatible with RS 232C RS 485 RS 422 standard of EIA TIA 2 electric interface RS 232 interface is the interface of DB9 mode socket RS 485 RS 422 interface is the interface of DB9 mode plug or RJ 45 connection port DB9 plug can be connected to the connection platlet can be wired conveniently through the hexad connection pins on the platelet 3 transmission medium RS 485 is with a twisted pair can be with screen advised impedance of the twisted paire should be 120Q RS 422 is with 2 twisted pairs can be with screen advised impedance of the twisted p air should be 120Q 4 working RS 422 is asynchronous whole duplex RS 485 is asynchronous semiduplex 5 signal indication indicator lightT XD RXD POWER 6 protection level 15000 V surge protection 7 transmission velocity 75 11520
6. ne whole duplex RS 422 mode 3point to point 2 line semiduplex RS 485mode 4point to multipoint 2 line semiduplex RS 485mode www sintech cn The product is of the state of self adaptation When users make the 2 RS 232 to RS 485connection usage make itRS 485mode 4 power supply and grounding surge protection connection according to RS 485 the product is in the state of RS 485 D RS 232 RS 485 point to point 2 line semiduplex l external power supply STM 8522B interfaced adapter canbe used semiduplex When users make the connection according to RS 422 the product communication This mode is mainly used on host computers with the 9V power supply adapter in standard fittings and can also is in the state of RS 422 whole duplex of RS 232 port and the controlled end equipments are of with DC or other equipments Power supply volt is 9V current is RS 485 port because of the different electric features the 2 100mA D RS 232 to RS 422 connection usage make itRS 422mode ends can t be connected directly without an interface 2 grounding surge protection common interfaced switches are RS 232 RS 422 point to poin 4 line asynchronous whole duplex adapter According to the following chart when users make without the protection device of large power Because of communication This mode is mainly used on host computes of the connection instantaneous high tension of circuitry induction on interfaced data RS 232 port and the controlled end equipments are
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