UT-1204 4-port RS-485 Hub User Manual
Contents
1. J 45 sockets and of them RS 485 and RS 232 are for input port 1 4 are for photoelectric isolation output OTEK 4 PORT RS 485 HUB Figure 1 UT 1204 Front Panel rm RS 485 OUTPUT INPUT r 4 3 2 1 RS 485 RS 232 Figure 1 UT 1204 Back Panel Indicators on the front panel are interpreted as the following PWR indicates power red for on TD indicates data sending green for normal from INPUT ports to OUTPUT ports 1 4 RD indicates data receiving yellow for normal from OUTPUT ports1 4 to INPUT ports E1 E4 failure waning for ports 1 4 light on indicates short circuit or signal reverse for RS 485 interfaces connected with ports 1 4 El for port 1 E2 for port 2 etc IV Electric interface and definitions RS 232C interface definition RS 485 interface definition TXD RXD GND 485 485 i Figure 3 RS 232C interface Figure 3 RS 485 interface 1 RS 232C interface definition RJ 45 connector Definition Signal direction 2 RS 485 interface definition RJ 45 connector RS 485 SO 6 Port 4 only 5V 1A Spare power input 7 8 Port 4 only Grounding protetion 2 Connection from RJ 45 plug pin of RS 232 interface to DB9 female RIs one i R 45 Plug Pin 1 DCD 1 1 DCD TxD 2 2 RxD RxD 3 3 i TxD DTR 4 4 DTR GND 5 5 GND DSR 6 6 DSR CTS 7 7 i RTS RTS ig g CTS V Applications 1 Applicaitons of connection from main control machine serial2. RS 232C tomultiple highly reliable RS 485 interfaces RS 485 device A I P RS 232 port Port2 UT 1204 vice C Port3 Mmain control machine 2 Application of extension to 4 highly reliable RS 485 interfaces from existing RS 485 bus and as many as 128 RS 485 hubs are supported on the RS 485 bus S 485 device A RS 485 Bus I P RS 485 port Port2 UT 1204 vice C Port3 3 Application of connection from main control serial RS 232C to multiple highly reliable RS 485 interfaces RS 485 device A Port 1 RS 485 device B I P RS 232 port eek Port 2 Mmain control UT 1204 machine I Port 3 RS 485 device C Port 1 I P RS 485 port vice E Port 2 UT 1204 Vice F nt Port 3 Port 4 2 Application of extension to 4 highly reliable RS 485 interfaces from existing RS 485 bus and as many as 128 RS 485 hubs are supported on the RS 485 bus RS 485 deviceA RS 485 Bus RS 485 device B O 4 _I P RS 485 port Port 2 UT 1204 RS 485 device C I Port 3 I P RS 485 port vice E Port2 UT 1204 vice F I Port 3 Port 4 VI RS 485 ports failure warning and protection RS 485 ports failure warning and protection is an effective solution for the connection of multiple RS 485 devices and reliability enhancement The 4 ports for lower machines with short circuit protection can work in off mode Failure of any one of the RS 485 ports affects only the RS 485 bus system connected with t
3. TEK UT 1204 4 port RS 485 Hub User Manual I Summary As a new RS 485 bus splitting hub specially designed to meet requirements of RS 485 systems under complex electromagnetic environments UT 1204 supports a transmission rate as high as 115 2KBPS To ensure safe data transmission photoelectric isolation technology is adopted for RS 485 interfaces to eliminate the induction of lighting surge into converter or related devices An isolation voltage as high as 2 500V can be provided by the built in photoelectric isolator and the 600W surge protection circuit for effective restraint of lighting and ESD as well as lighting strike and common grounding interference The external switching power ensures the best safety and stability for outdoors projects The direction interpreting circuit under RS 485 working mode is able to perform automatic interpretation of data stream direction for circuit control through automatic shift therefore the transfer delay for RS 485 is solved RS 485 interface has a transmission distance of more than 1 200 meters with stable performance It is widely used in speedway charging system road monitoring system and electric data gathering system as a quality product for data interface conversion at competitive price All ports of RS 485 star bus connection provided by UT 1204 RS 485 hub have short circuit and open circuit protection The photoelectric isolation voltage is as high as 2 500V The RS 485 bus structure can b
4. e easily re shaped and network range split for improvement of communication reliability In the event of lighting strike or device failure the affected network range will be isolated to ensure the normal working of other network ranges This feature enhances the reliability of the current RS 485 network greatly with effective decrease of time consumption for network maintenance A proper use of UT 1204 RS 485 hub will surely help you present a nice RS 485 system design of uniquely reliable stability II Performance parameters 1 Interface compatible with RS 232C and RS 485 standards by EIA TIA 2 Electric interface RS 232C interface for RJ 45 socket and RS 485 interface for RJ 45 socket 3 Transmission media twisted pair cable or shielded cable 4 Working mode asynchronous duplex 5 Signal indication 7 signal indicator power PWR sending TD receiving RD and failure E1 E4 6 Isolation degree isolation voltage 2 500 Vrms 500VDC continuous DV DC modules 7 Transmission rate 115 2K 300BPS 8 Protection grade SKV ESD protection for RS 232 interface and 600W lighting surge protection for each RS 485 interface 9 Transmission distance 0 5 kilometer 115 200 300BPS 10 Measurements 90mm 69mm 23mm 11 Working environments 25 to 70 degrees Celsius relative humidity 5 to 95 III Product panel and signal indication There are 7 indicator lights on the front panel of UT 1204 On the back panel there are 6 R
5. hat port while other RS 485 systems from other ports work normally The user can locate the failed port or devices connected according to the failure indicator lights VII Power supply and anti lighting protection Mini sized external switching power supply of 5V 1A is used for UT 1204 Don not use other un regulated power to avoid damage of the product The 600W lighting protection of all the interfaces of UT 1204 effectively restrain lighting and ESD The surge protection grounding of RJ 45 pin 7 8 in port 4 of UT 1204 shall be well grounded without being suspended in the air for a safe communication
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