NM-422ETH. NMEA-0183 Multiplier With Ethernet Interface. User Guide V1.00

Transcription

1 NM-422ETH NMEA-0183 Multiplier With Ethernet Interface User Guide V1.00

2 2

3 3 TABLE OF CONTENTS

4 4 1. INTRODUCTION The NM-422ETH is a two channel NMEA-0183 input / four channels NMEA-0183 output multiplier. It enables data distribution from two NM-0183 sources (primary and secondary with priority encoding) to all NMEA-0183 instruments through four talker ports and direct PC connection through RS-232. In addition the Ethernet interface enables connection of the NM-422ETH in a local TCP/IP network topology. Data from PC s charting system can be delivered back to the autopilot from the same RS-232 port or Ethernet interface (user selectable via jumper) which acts bidirectional (talker and listener). 2. OPERATION The NM-422 acquires NMEA-0183 sentences from the most significant input and immediately sends them to the four general purpose outputs and the RS-232. A watchdog timer routine supervises if the NMEA signal is correctly applied in the primary input and switches to the secondary input whenever there is no NMEA sentence for at least eight seconds. In this case secondary input starts receiving data if there is an instrument attached. If not, device automatically returns to the primary input after eight seconds. When secondary input is already in receiving mode and a NMEA signal is applied to the primary port, device immediately switches to the primary input. In the case that no signal is applied to any input, device circles around sampling the two listener ports every eight seconds until a NMEA-0183 signal appears to any of the two listener ports. 3. INPUT PORTS The NM-422 has two input ports that can be connected to any instrument indented for marine use that can output NMEA-0183 signals. Each one of the two listener ports is optoisolated as specified in NMEA-0183 protocol, thus data(-) pole should never been connected to NM-422 ground. If the instrument s talker port is single ended, connect that terminal to the Ina(+) or Inb(+) input and tide the Ina(-) or Inb(-) to instrument s ground. The two listener ports can acquire NMEA-0183 sentences carried in TTL, RS-232 and RS-485/422 signal levels. 4. OUTPUT PORTS 4.1. General Purpose Talkers

5 5 Each of the four general purpose talker ports produce NMEA sentences in both RS422 and TTL signal levels, depending on the connection topology and can fan out one instrument. Current drawn from every port can be up to 20mA, efficient enough to drive every NMEA compatible instrument RS-232 Interface The RS-232 port can deliver NMEA sentences to any modern computer running the appropriate software on Windows 98 and above provided that serial communication follows the 4.800/8/N/1 standards. This port is not optically isolated and should be used for testing purposes only to avoid DC leakage. It can be used though to interface a computer system if proper isolate connection is achieved or if the computer is supplied from an isolated power supply. Connecting cable should not exceed the length of 9m Ethernet Interface It enables connection of NM-422ETH to a local TCP/IP network using a hub or switch or directly to PC if there is only one NM-422ETH. A virtual serial port then has to be created at the computer running the charting software. The PC then inputs data from NM422-ETH though the virtual serial port and acts like a serial port multiplexer. Every NM-422ETH is user configurable via internet explorer and can get IP addresses automatically via DHCP server or manually (static IP) Autopilot Port The NM-422ETH converts signals received when full duplex communication with the computer is enabled to TTL signal level NMEA-0183 sentences. User can select via two position jumper if either data from RS-232 or Ethernet interface will be delivered to autopilot port (see chapter 10) Dual Converter Function The NM-422ETH can also be configured as a bidirectional RS-232 to TCP/IP converter through dip switch settings (see chapter 9). This feature does not affect distribution of data from the inputs to the four RS-422 outputs. 5. POWER SUPPLY The NM-422ETH can be powered with in the range of Vdc. The nominal voltage of 24 Vdc is advised for powering the device in normal operation. Power input has a protection for incorrect polarity connection of the supplying voltage. When power LED lights a correct supply voltage application is indicated. 6. CONNECTION TOPOLOGIES The NM-422 can be connected as shown in figures 1,2 and 3 using all RS-422 outputs (figure 1), all TTL outputs (figure 2) or using either the RS-422 or TTL output of each port taking care not to connect the same port for both signal level outputting.

6 6 Figure 1: Connection to RS-422 Outputs

7 7 Figure 2: Connection to TTL outputs

8 8 Figure 3: Combined use of TTL and RS-422 outputs

9 9 7. ETHERNET INTERFACE CONNECTOR PINOUT Multiple NM-422ETH (up to 254) can be connected to a local network by using a commercial Ethernet switch. UTP cables in that case should be ended at both sides with RJ45 male connectors with a pin out as indicated in table 1 (straight/patch cable connection). Computer should also have a standard network card installed. Front view of the RJ45 MALE pin. Pin's top with Locking clip Name Pin Wire Color Pin Name TX+ 1 White/Orange 1 TX+ TXRX+ 2 3 Orange White/Green 2 3 TXRX+ 4 Blue White/Blue Green White/Brown 7 Brown 8 RX- RX- Table 1: Pinout for straight cable with description names In cases where only one device is installed, computer and NM-422ETH can be connected using a crossover UTP cable (table 2) First Side of cable Color Second Side of cable Name Pin Pin Name Color White/Orange TX+ 1 3 RX+ White/Orange Orange TX- 2 6 RX- Orange White/Green RX+ 3 1 TX+ White/Green Blue 4 White/Blue goes to 7 Blue White/Brown 7 4 White/Brown Brown 8 5 Brown Green RX- White/Blue TX- Green Table 2: Pinout for Ethernet 10/100Base-T Crossover cable with description names 8. LED INDICATOR SEQUENCE Power LED Inb LED Ina LED ON OFF ON OFF ON OFF : Main Power supply correctly applied : No power or wrong polarity : Currently sampling from secondary port Inb : Currently sampling from primary port Ina : Currently sampling from primary port Ina : Currently sampling from secondary port Inb

10 10 TXD LED RXD LED ORANGE LED on RJ-45 connector GREEN LED on RJ-45 connector 9. Flashing indicates data transmission to four general purpose talker ports and RS-232 port Flashing indicates reception from RS-232 port or Ethernet interface and transmission to the autopilot port ON: Network cable connected OFF: Network cable disconnected ON or flashing: Data flow through TCP/IP network OK OFF: No data flow through TCP/IP network or no input DUAL CONVERTER CONFIGURATION The NM-422ETH can be configured as a bidirectional RS-232 to TCP/IP converter and data distributor at the same time. This can be done by setting SW1 of dip switch array (see DSWITCH in figure 4), located inside the device, to position ON. Function SW-1 SW-2* SW-3* SW-4* Selects transmission from Ina or Inb to four general OFF X X X purpose ports, RS-232 and Ethernet interfaces Selects transmission from Ina or Inb to four general ON X X X purpose ports. Enables independent bidirectional data transmission between the RS-232 and Ethernet interface. Note: SW-2, SW-3 and SW-4 are intended for future use and should not be configured Figure 4: Composite Assembly of NM-422ETH 10.AUTOPILOT PORT CONFIGURATION Autopilot port can deliver data either from RS-232 or the Ethernet interface by configuring jumper J1 located inside NM-422ETH (see figure 4). Function Selects transmission to autopilot from RS232 Selects transmission to autopilot from Ethernet Interface Poles connected AP - RS232 AP - ETH

11 11 11.SPECIFICATIONS Supply Voltage Power Supply Protection 10 to 35 Vdc PTC Resetabble Fuse Vmax: 60V, Imax: 40A, Ihold: 0,25A (23 C), Itrip:0,5A (23 C), Max time to trip (23 C): 2,2sec for 1,25A 50mA in idle state/ 150mA in full output mode 2 x NMEA-0183, optically isolated Common Mode Rejection: 10kV/usec Isolation: 480 Vrms 1,5 KOhm 4 x buffered RS-422/TTL (general purpose) 1 x RS x TCP/IP interface 1 x TTL received from charting system through RS232 for navigational purposes (e.g. autopilot control) Buffered for all RS-422 outputs Baud 4.800/8/N/1 for RS Baud for buffered outputs 4.800/8/N/1 for RS-232 Power on Most Significant Input (Ina) Less Significant Input (Inb) Data transmission (TXD) Data reception (RXD) Network cable connected TCP/IP data flow Width = 110mm/134,80 mm Depth = 82 mm Height = 43 mm Styrene Current Consumption Inputs Input Resistance Outputs Output protection Speed for NMEA inputs Speed for NMEA outputs Indicators Dimensions Housing 12.TROUBLESHOOTING No LED indications and the power LED off. - Check Power Supply voltage levels and connection polarity - If correct check fuse located inside the enclosure - Else call service Power LED is on but no transmission is achieved - Check if instrument is transmitting data - If yes check listener s port polarity - Else call service Charting system sends through RS-232 or Ethernet interface data to autopilot and there is no reception from my autopilot. - Check configuration of the physical or virtual serial port of the computer to follow the 4.800/8/N/1 standards - Check if signal from the autopilot port is correctly applied to the autopilot - Else call service 13.INSTALLING THE DEVICE DISCOVERY UTILITY The following procedure shows how to install Device discovery utility which is useful for tracking and managing NM-422ETH devices connected to a local network. When installing discovery utility NM-422ETH does not have to be connected or powered on.

12 12 STEP 1: Open windows explorer and find Device Discovery Utility in supplied CD-ROM. Double click on DUSetup.exe to begin installation STEP 2: Windows could then give a warning that user is about to run the selected file. Click Run to continue STEP 3: Click Next to continue

13 13 STEP 4: Select destination folder for the Utility to be set up (default folder recommended) and click Next STEP 5: Copying of the needed files is ready to begin. Click Next to continue STEP 6: After completion of installation a success notice is supplied. Click Finish to exit. 14.USING THE DEVICE DISCOVERY UTILITY Before running Device Discovery Utility for the NM-422ETH installer must first check that:

14 NM-422ETH is powered up correctly Ethernet cables are connected Device Discovery Utility has been set up properly After running utility (located under Start>All Programs>Digi>Digi Device Discovery) a not properly configured message could appear. This means that IP address has not properly been assigned and needs reconfigure. Configuring network settings can be done within the Device Discovery Utility either by letting the network switch assign IP address for every NM-422ETH, or manual. Right click on highlighted IP address of every device to get the drop down menu and select Configure network settings as shown in figure above Automatic IP configuration (DHCP)

15 15 Obtaining Network settings automatically via DHCP function of Ethernet switch can be done by checking Obtain network settings automatically radio button and then Save. NM-422ETH will then restart and after a minute it will appear again with no warnings in the window. In the bottom left corner the new IP details appear indicating that it is automatically configured (DHCP). If no new settings appear in window after a minute user should click on the refresh button to research for NM422ETH devices over local network Manual IP configuration (Static IP)

16 16 Configuring Network settings manually (recommended) can be done by checking Manually configure network settings radio button. Select for every NM-422ETH a different address in IP address field matching the X or X local network standard and leave subnet mask the same ( ) for every device. Click Save to continue. NM-422ETH will then restart and after a minute it will appear again with no warnings in the window. In the bottom left corner the new IP details appear indicating that NM-422ETH it is manually configured (Static IP). If no new settings appear in window after a minute user should click on the refresh button to research for NM-422ETH devices over local network 15.INSTALLING VIRTUAL PORT DRIVER IN WINDOWS XP

17 17 Before installing Windows XP driver for the NM-422ETH installer must first check that: NM-422ETH is powered up correctly Ethernet cable is connected Discovery utility is already set up Either fixed IP address (recommended) or DHCP address has been assigned to NM-422ETH NM-422ETH is configured as a Real-Port (already done in production stage) STEP 1: Connect NM-422ETH power and network cable, open control panel and select Add Hardware STEP 2: Select Next to continue with the Add Hardware Wizard

18 18 STEP 3: Select Yes, I have already connected the hardware and click Next STEP 4: Select Add a new hardware device and click Next STEP 5: Select install the hardware that I manually select from a list (Advanced) and click Next

19 19 STEP 6: Select from the list the option: Multi-port serial adapters and click Next STEP 7: Select Have Disk to point to driver location (provided CD-ROM or other location) STEP 8: Select Browse to begin searching

20 20 STEP 9: Find folder of drivers and click open STEP 10: After correct selection of driver folder, Driver for NM-22ETH should appear as a Standard RealPort Device. If so continue by pressing Next. Otherwise search in another location STEP 11: The wizard is ready to complete installation. Click Next to continue

21 21 STEP 12: The device should be listed as in this figure. IP address could take a value assigned by DHCP server and might vary from the indicated value. Click Next to continue STEP 13: Select which COM Port Name will be assigned in virtual serial port (selection of default Port is recommended). Click Next to continue STEP 14: Click finish to complete installation

22 22 STEP 15: After completion the Device Manager should look like in this figure