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34

6193-3201

3.12.2 Serial Gateway

Serial Gateway functionality is available for both RS-232 and RS-485 ports independently,
and enables serial data to be routed via the wired or wireless network connection. Serial
Gateway functionality is similar to radio modem functionality, but since Serial Gateway
uses TCP/IP it only allows point-to-point connections (i.e. serial data cannot be broad-
cast).

Serial Gateway may be configured as either Server or Client. When configured as Server,
the module will wait for a connection to be initiated by a remote client. When config-
ured as Client, the module will automatically attempt to connect to the specified remote
server.

Some of the possible Serial Gateway topologies are illustrated below.

There are software packages available (i.e. SerialIP Redirector by Tactical Software) that
can create a virtual serial port on a PC. This virtual serial port can be configured to con-
nect to a RM-90 serial port. Standard programs can then be used to access this serial
port as if it were actually connected to the PC. Alternatively the program telnet may be
used to connect to a serial port on the RM-90. The telnet command used should be:

6XXZhh
Ed^ci

A6C

8a^Zci

8a^Zci

E8Gjcc^c\

IZacZidgHZg^Va>E

GH"'('

HZgkZg

GH"'('

9Zk^XZ

6XXZhh
Ed^ci

8a^Zci

GH"'('

9Zk^XZ

GH")-*

9Zk^XZ

GH"'('

HZgkZg

GH")-*

8a^Zci

6XXZhh
Ed^ci

8a^Zci

GH"'('

9Zk^XZ

GH"'('

9Zk^XZ

GH"'('

HZgkZg

GH"'('

8a^Zci

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Содержание RM-90

Страница 1: ...Wireless Ethernet Radio Modem www westermo com Westermo Teleindustri AB 2006 Reference Guide 6193 3201 RM 90...

Страница 2: ...2 6193 3201 Thank you for your selection of the RM 90 Wireless Ethernet Modem We trust it will give you many years of valuable service...

Страница 3: ...re requirements in section 1 1310 of the FCC Rules antennas used with this device must be installed to provide a separation distance of at least 20 cm from all persons to satisfy RF exposure complianc...

Страница 4: ...antenna cable combinations as specified below WESTERMO Antenna Part Antenna Gain Cable Options No Cable CC10 900 CC20 900 WH900 2dBi OK N A N A DG900 2dBi OK N A N A CFD890EL 0dBi OK N A N A SG900EL 5...

Страница 5: ...echnologies first 1 A radio license is not required in some countries provided the module is installed using the aerial and equipment configuration described in the RM 90 Installation Guide Check with...

Страница 6: ...al port using PPP point to point protocol PPP allows the RM 90 to connect serial communications into the Ethernet network Access Point vs Client The Access Point unit acts as the wireless master unit...

Страница 7: ...IP address for the wireless side is the same as the Ethernet side A Router connects devices on different LAN s The IP addresses for the Ethernet and wireless sides are dif ferent In the above example...

Страница 8: ...t read Section 2 Installation The RM 90 requires an antenna and a power supply Power the RM 90 and make an Ethernet connection to your PC for further informa tion on how to do this refer to section 3...

Страница 9: ...e degree of radio interference and obstructions such as hills or trees to the radio path Typical reliable distances for 1W transmit power are USA Canada 15 miles 6dB net gain antenna configuration per...

Страница 10: ...s of antennas suitable for use It is important antenna are chosen carefully to avoid contravening the maximum power limit on the unlicensed channel if in doubt refer to an authorized service provider...

Страница 11: ...a transmits the same amount of radio power in all directions as such that are easy to install and use The dipole antenna with integral 15 cable does not require any additional coaxial cable however a...

Страница 12: ...d exactly in the direction of transmission to benefit from the gain of the antenna The Yagi antennas may be installed with the elements in a vertical plane vertically polarized or in a horizontal plan...

Страница 13: ...at 24VDC 2 4 Serial Connections 2 4 1 RS 232 Serial Port The serial port is a 9 pin DB9 female and provides for connection to a host device as well as a PC terminal for configuration field testing and...

Страница 14: ...ts on the RS 485 cable may send data at any one time Thus communication protocols based on the RS 485 standard require some type of arbitration RS 485 is a balanced differential standard but it is rec...

Страница 15: ...3 3201 HJEEAN GH 9 E HL I8 DG DHI DHI GB I GC I 9 D 9 6JAIH 9 E HL I8 GH XdccZXi dc jh c iZgb cVi c gZh hidg GH 100M RUN SETUP LINK MDI X ETHERNET DCE ON OFF RS 485 RMINATION RS 232 RS 485 COM T T DTO...

Страница 16: ...ntain reliable operation of driving relays The digital input is connected between the DIO terminal and common COM The I O circuit includes a LED indicator which is lit when the digital input is active...

Страница 17: ...d perhaps from an Access Point If the Client finds suitable Access Points during the scan it will then attempt to establish a link with the Access Point with the strongest radio signal Link Establishm...

Страница 18: ...ink After a Client has reset it s Link status it will start scanning for an Access Point as if it has just started up LED Indication The following table details the status of the indicating LEDs on th...

Страница 19: ...ccessing Configuration for the first time There are two methods for accessing the configuration inside a RM 90 The first method requires changing your computer settings so that the configuring PC is o...

Страница 20: ...b Connect the RS 232 port on the RM 90 to the RS 232 port on the PC using a straight through serial cable c Open a terminal package such as Hyperterminal with 19200bps data rate 8 data bit 1 stop no p...

Страница 21: ...ecessary for the majority of applica tions A Quick Start configuration is provided for simple networks This is the first stage of the module configuration For most applications no further configuratio...

Страница 22: ...p sets are automatically selected to minimize any radio interference from other RM 90 systems The System Generator String should be a unique data string for example BLUEpencil93 The same System Genera...

Страница 23: ...dant wireless links are being used This is explained in Section 3 9 MAC Address This is the unique hardware address of the RM 90 assigned in the Factory For the majority of systems this item should no...

Страница 24: ...4 bytes for 128 bit AES encryption These keys must be entered as hexidecimal numbers separated by colons For example 12 AB EF 00 56 for 64bit encryption and 12 AB EF 00 for 128bit AES encryption Encr...

Страница 25: ...dundant wireless links may be set up by using the Spanning Tree Algorithm function refer to section 3 9 Router Operation A router joins separate Ethernet networks together The router has different IP...

Страница 26: ...et is In countries which only allow a sub set of the 902 928 MHz band there is only one group of frequencies and it is not possible to separate systems in this way because the band is smaller and all...

Страница 27: ...has an impact on the maximum size of packet that may be transmitted Refer to Fragmentation Threshold for more information The default value is 400 milliseconds Beacon Period This interval is the peri...

Страница 28: ...hernet traffic is only small packets sizes ie 300 bytes an improvement in overall through put rate can be achieved by reducing MTU size This improvement is achieved through a reduc tion in the retry h...

Страница 29: ...a time such as a master device polling slave devices there is some advantage in overall system speed by set ting the Contention Window Size low to perhaps 1 or 2 Apply Changes Update settings Apply Ch...

Страница 30: ...wireless transmissions and enhance security The RM 90 may be configured to reject or accept messages to and from certain Addresses To accept wireless messages from particular devices a Whitelist of Ad...

Страница 31: ...ask 255 255 255 0 with the radio and filter disabled The XX in the IP address is the last two digits of the serial number Configuration webpages will still show the original configuration No changes a...

Страница 32: ...AC Address translation table entry i e whenever the device may need to send an ARP request to determine the MAC address of a device with a known IP Address An ICMP filter is needed to allow disallow p...

Страница 33: ...rial baud rate 38400bps Hardware flow control Local address 192 168 123 123 Remote address 192 168 123 124 To configure Windows XP to establish a PPP connection to a RM 90 in SETUP mode fol low these...

Страница 34: ...e module will automatically attempt to connect to the specified remote server Some of the possible Serial Gateway topologies are illustrated below There are software packages available i e SerialIP Re...

Страница 35: ...y Enter the TCP port number on which the server must listen for incoming con nections The standard TELNET port is 23 Client When configured as Client the module will automatically attempt to connect t...

Страница 36: ...e RS 485 Modbus TCP to RTU Gateway Check this box to enable the Modbus TCP to RTU Server on the RS 485 port Only a single serial port is allowed at a time Data Rate The serial data rate desired Serial...

Страница 37: ...configuration is viewed and changed in a web format which is an Ethernet application you can view or change the configuration of a remote module via the wireless link provided the remote module is alr...

Страница 38: ...on PC and RM 90 are setup to communicate on the same network Set dipswitch to SETUP mode Power up unit and wait for LINK led to cease flashing Adjust PC network settings Set Configuration PC network c...

Страница 39: ...to RUN i Reset RM 90 with reset command j Open configuration webpage with Internet Explorer at address http 192 168 0 200 When prompted for password enter default username user and password user Ente...

Страница 40: ...itch to SETUP Power up unit and wait for LINK led to cease flashing Adjust PC network settings Set Configuration PC network card with network setting of IP address 192 168 0 1 netmask 255 255 255 0 Op...

Страница 41: ...er a System Generator String Select the Radio Encryption required Set dipswitch to RUN Save the changes and unit will reset Wait for unit to complete reset Open configuration webpage with Internet Exp...

Страница 42: ...lash Serial Port Receiving CTS low LAN ON Link Established on Ethernet port LAN Flash Activity on Ethernet port Serial GREEN flash RS 232 Serial Port Activity Serial RED flash RS 485 Serial Port Activ...

Страница 43: ...s receiving a valid status from This sending units identity is shown as its MAC address for that unit The graph is a represen tation of the RSSI and indicates the value of this RSSI on each of the 50...

Страница 44: ...al is strong enough a link may be established and the Connectivity webpage of the Access Point may be opened If the link is weak the LINK led will go out and the remote Connectivity webpage of the Acc...

Страница 45: ...en pinged this can be used to see the IP address MAC address of the remote computer It will also show any other devices on the network that it may be connected to The command used is Arp a It shows th...

Страница 46: ...255 255 0 In the Network A PC a routing rule is to be set This will allow Network A B to have access to each other This is entered under cmd prompt Route ADD 192 168 2 0 MASK 255 255 255 0 192 168 0...

Страница 47: ...nd TX Radio RX and TX Link Operating Temperature 40 to 140 degrees F 40 to 60 degrees C 0 99 RH non condensing Power Supply Nominal supply 10 to 30VDC Overvoltage and reverse voltage protected Current...

Страница 48: ...0 Auto function determines fastest rate within user con figured fade margin Serial Ports RS 232 Port DB9 female DCE RTS CTS DTR DCD hardware signals provided RS 485 Port 2 pin terminal block Max dista...

Страница 49: ...00P_x x bin gz and firmware application file epm_RM90_x x bin gz using the Browse buttons in the FlashUpdate program 6 Connect PC to RM 90 RS 232 serial port with straight though serial cable 7 Select...

Страница 50: ...he signals crossover If an eight wire cable was being used for instance the signal would start on pin one at one end of the cable and end up on pin eight at the other end They cross over from one side...

Страница 51: ...servers The program works behind the scenes to facilitate surfing the Web with alpha versus numeric addresses A DNS server converts a name like mywebsite com to a series of numbers like 107 22 55 26 E...

Страница 52: ...as more than 300 000 members and is involved with setting standards for computers and communications Infrastructure mode A client setting providing connectivity to an AP As compared to Ad Hoc mode whe...

Страница 53: ...provides connection serv ices similar to TCP IP ISA A type of internal computer bus that allows the addition of card based components like modems and network adapters ISA has been replaced by PCI and...

Страница 54: ...k s MAC table will be able to get onto the network NAT Network Address Translation A network capability that enables a houseful of computers to dynamically share a single incoming IP address from a di...

Страница 55: ...ay Each individual wireless LAN will probably use the same subnet for all the local computers it talks to Switch A type of hub that efficiently controls the way multiple devices use the same network s...

Страница 56: ...ferred over the Internet VPN can work with either wired or wireless networks as well as with dial up connections over POTS VPN creates a private encrypted tunnel from the end user s computer through t...

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Страница 60: ...80 01 info westermo se Westermo OnTime AS Gladsvei 20 0489 Oslo Norway Phone 47 22 09 03 03 Fax 47 22 09 03 10 E mail contact ontimenet com Westermo Data Communications Ltd Talisman Business Centre D...

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