ADAM-4541
Contents
1. bus supervision No external flow control signals required for RS 485 Transient suppression and over current protection on RS 422 485 data lines Reserved space for termination resistors Power and data flow indicators for troubleshooting Power requirement 10 30 Voe Specifications Casing ABS with captive mounting hardware Communication mode Asynchronous Fiber optics Multimode Connector Plug in screw terminal Fiber port ST Transmission distance Over 2 5 km Wavelength 820 nm Optical power budget attenuation 12 5 dB measured with 62 5 125 mm optical fiber Transmission mode Full Half duplex bidirectional Transmission rate Up to 115 2 kbps Accessories included Nylon DIN rail mounting adapter SECC panel mounting bracket Operating temperature 10 70 C 14 158 F Operating humidity 5 95 non condensing Power consumption 1 W typical 1 5 W max Note Multi mode fiber optics are designed for industrial applications 50 125 mm 62 5 125 mm and 100 140 mm are commonly used Installation Initial Inspection We carefully inspect the ADAM 4541 both mechanically and electrically before we ship it It should be free of marks and scratches and in perfect condition on receipt As you unpack the module check it for signs of shipping damage damaged box scratches dents and so on If it is damaged or fails to meet our specifica2. SERIAL COMMUNICATION INTERFACE FOR INDUSTRIAL AUTOMATION ADAN 4541 Fiber Optic to RS 232 422 485 Converter Introduction Fiber optic transmission offers the benefits of wide bandwidth immunity to EMI RFI interference and secure data transmission The ADAM 4541 can be used as an RS 232 422 485 point to point or point to multipoint connection for transmitting and converting full half duplex signals and their equivalents within a fiber optic environment Fiber optics are the perfect solution for applications where the transmission medium must be protected from electrical exposure lightning atmospheric conditions or chemical corrosion The ADAM 4541 is specifically designed to link various machinery equipped with RS 232 422 485 communication ports such as computer systems or manufacturing machines across distances in excess of 2 5 km Using standard ST connectors the module s fiber optic ports can accommodate a wide range of fiber optic cable sizes including 62 5 125 mm Features Compact size economizes space Direct plug and play Easily mounted on a DIN rail panel or piggyback Transmission speeds of up to 115 2 kbps Multi mode optical fibers enable transmission farther than 2 5 km Half Full duplex bidirectional transmission mode Avoids lightning strikes and EMI RFI interference Prevents damage from electrostatic discharge Stable and error free data transmission Automatic internal RS 485
3. and gets cmd VG ADAM 4541 User s Manual Troubleshooting Possible reasons for malfunction gt The TX and RX connections are reversed Solution Make sure the fiber connection is made so that the TX of one end is connected to the RX of the other gt Poor connection between the ADAM 4541 and the communication port Solution Make sure the ADAM 4541 is securely plugged into the communication port gt Attenuation on the fiber causes the signal level to drop below the accepted level Solution Reduce the attenuation by reducing connector loss transmission distances etc gt The connection between the communication ports is neither DTE to DTE nor DCE to DCE but is a DTE to DCE connection Solution Add a converter to one of the optical modems so that the pin assignments from the communication port to the modem are from pin 2 to pin 3 and from pin 3 to pin 2 v The fiber has been damaged Solution Repair or replace the fiber gt The ADAM 4541 has been damaged Solution Use the supplied software to perform a loop back test of the optical modem to determine whether it has really been damaged Power Supply For the ease of use in industrial environments the ADAM modules are designed to accept industry standard 24 Vo unregulated power Operation is guaranteed when using any power supply between 10 and 30 Vc Power ripples must be limited to 5 V peak to peak while the voltage in all
4. ata format settings on all the other modules in the network sw2 Switch 2 sets the baud rate The options range from 1200 bps to 115 2 kbps The factory default is 9600 bps Be aware that when you change the baud rate you also have to change the baud rate for all the connected modules accordingly If the RS 232 422 mode is ON the baud rate does not need to be set Block Diagram RS 232 Fiber Default settings Both modules are not addressable by the host computer The baud rate and data format must be set using SW1 and SW2 located inside the module The default settings are Default settings Function Setting Baud rate 9600 bps Data format 10 bits The following tables illustrate the switch settings for the ADAM 4541 ADAM 4541 data format settings SW1 Data Format 1 2 9 bits O O 10 bits e O 11 bits O e 12 bits e e O Off On Default ADAM 4541 baud rate settings SW2 BaudRate 1 2 3 4 5 6 7 8 9 1200 bps e oo 0 O00 0 0 2400 bps oe 000000 0 4800 bps o08e800000 0 9600bps O O O O O 0 0 0 19 2 kbps oo0oa0ao0obs o ooo 38 4 kbps Oo 0000o 0o0ooOo 57 6 kbps O O OOOO 115 2kbps O O O O O O O O RS 232 422 O O O O O O O O 6 O 0ff o n Defaut Fiber Fiber RS 422 Optic RS 485 W _ G Repeating Hl Optic amp pea u W m g a ADAM 5000 485 ADAM 4541 User s Manual E
5. cases must be maintained between 10 and 30 V All power supply specifications are referenced at the module connector The power cables should be selected according to the number of modules connected and the length of the power lines When using a network with long cables we advise the use of thicker wire to limit line voltage drop In addition to serious voltage drops long voltage lines can also cause interference with communication wires Power supply 10 30 V We advise that the following standard colors as indicated on the modules be used for power lines Vs gt R Red GND gt B Black Front View RX X 0 ADAM 4541 Fiber Optic to RS 232 422 485 Converter a 1 1200 2 2400 3 4800 4 9600 5 19200 6 38400 ral 57600 8 9 115200 f RS 232 422 mode Z s495 RS422 5 292 Poa 2 2 ewe 4 6 k 8 3 5 x 6 e 6 4 4 A T OY nee ADAM 4541 User s Manual
6. tions notify our service department or your local sales representative immediately Also call the carrier immediately and retain the shipping carton and packing material for inspection by the carrier We will then make arrangements to repair or replace the unit ADAM and the ADAM logo are trademarks of Advantech Part No 2000454100 1st Edition Printed in Taiwan April 1998 Before you begin installation please make sure you have the following items e 1 ADAM 4541 module 1 mounting bracket 1 user s manual 13P to DB 9 cable Switch and jumper settings Switch settings DIP switches in the ADAM 4541 converter modules set the data format number of bits and baud rate for the ADAM network You can configure the other modules in the network via software commands Your program and the PC s serial port should match the settings of the converter and repeater modules sw1 Switch 1 controls the data format Data can be 9 10 11 or 12 bits The factory default is 10 bits one start bit eight data bits no parity bit and one stop bit When using the converter in combination with other ADAM modules do not change the default setting because ADAM modules have a fixed data format of ten data bits The option of changing to 9 11 or 12 bits is for use with other modules other than ADAM modules that have different data formats Should you change the ADAM module s data format be aware that you will also have to change the d
7. xample Prog This program can be used as a diagnostic test for the ADAM 4541 It will transmit a string to COM1 and then receive a string from COM1 a loop back test Program LOOPBACK C Signal Wiring lt dos h gt lt io h gt include include include lt stdio h gt include lt conio h gt define TIME OUT static int base0 0x3f8 static int basel 0x2f8 static char rec 160 static char cmd 160 void main 4000 int i timeout char rflag tflag bioscom 0 0xE3 0 printf nInput string gets cmd VG Set COM1 as follows amp 32 amp 1 When you run the example program you must connect the ADAM 4541 s terminals as follows RS 232 422 ie Tx ADAM 4541 Baud Rate 9600 Data Bits 8 Parity none Stop Bits 1 1 32 Check received data 1 0 Ss n rec Check timeout error while cmd 0 q amp amp cmd 0 cmd strlen cmd Ox0d i 0 tflag 1 while tflag Send data outportb base0 cmd i while inportb base0 5 rflag 1 timeout TIME_OUT while rflag if inportb base0 5 Receive data rec i inportb base0 if rec i 0x0d rec itl 0 printf nReceived data tflag 0 rflag 0 else timeout if timeout 0 printf Timeout rec itl 0 rflag 0 tflag 0 itt printf nInput comm
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