TX2123 RS485 TO ETHERNET ADAPTOR

Transcription

1 TX2123 RS485 TO ETHERNET ADAPTOR INSTALLATION AND OPERATING DATA ATEX UNDERGROUND MINING APPLICATIONS

2 1.0 PRINCIPAL FEATURES The TX2123 converts data communications between fibre optic Modbus TCP over Ethernet, and hard wired copper Modbus RTU over RS485. The Adaptor will convert between a single master on the Ethernet side and defined slave devices on the RS485 side. Both ports of the ADAPTOR have galvanic isolation from each other for maximum data security, this feature also ensures that intrinsically safe power supplies are fully electrically segregated. LED indicators on the front of the module provide information about the incoming power supply source and the activity of the communications ports. The operating parameters of the Line Repeater can be set-up to individual requirements using a web interface via a HTTP compliant browser. The device is housed in a robust and compact housing with integral mounting facilities for convenient DIN rail fitting, and large spacious terminals for the connection of heavy duty plant cables. 2.0 APPLICATION TX9042 Programmable Sensor Controller Network System TX9165 Sentro 8 Sensorstation Network System TX2100 Commander Distributed Network System General Approved Intrinsically Safe Data Transmission System and Apparatus 2

3 3.0 DIMENSIONS TX All dimensions in mm 4.0 CONNECTIONS The fibre optic parts are on the ETHERNET side and should be LAN connected via an ETHERNET interface to a PC or SCADA system. Run HTTP web browser on the PC to configure the TX2123 Ethernet Adaptor. Remote slave devices should only be connected to the RS485 side. The maximum number of connected slave devices is limited by the parameters of the appropriate intrinsically safe certification. Ethernet interface Fibre Optics Fibre Optic Ports Activity Link Power Tx Rx A B 0V +V A B 0V +V 3

4 5.0 TECHNICAL DETAILS Supply Voltage 12V dc nominal (10V 14V dc) Current Consumption 350mA Operating Temperature 0 C 40 C Storage Temperature -40 C 70 Power ON LED Indicators Transmitted data activity Ethernet link established Dataport configuration Fibre optic ETHERNET port for LAN connection to PC or SCADA Hard wired copper RS485 port for connection to slave devices Reset system Pin hole access RESET switch returns all data to the original manufactured settings Data communications ETHERNET Fibre Optic Port PHYSICAL LAYER Standards Media support Multimode optical fibre Connectors Maximum distance Data transfer rate 100BASE-FX; IEEE802.3u Fibre optic multimode: 50/125um or 62.5/125um 1300nm Full duplex ST 500m 10 or 100 M bps DATA LINK LAYER Unique exclusive MAC address PROTOCOL LAYERS Network Transport Session Presentation APPLICATION LAYER Reformat MODBUS Ethernet messages to MODBUS RTU 4

5 5.0 TECHNICAL DETAILS (continued) RS485 Hand Wired Copper Port PHYSICAL LAYER Electrical Baud rate Maximum distance RS485 two wire multidrop, half duplex baud. All standard rates 1000m dependant upon cable parameters DATA LINK LAYER PROTOCOL MODBUS RTU APPLICATION LAYER Reformats incoming MODBUS RTU messages to MODBUS Ethernet MODBUS PROTOCOL MODBUS RTU (MODBUS ASCII is not supported) MESSAGE RTU BYTE FORMAT Start bit Data bits Parity bit Stop bit 1 8 (LSB first) 1 1 Function ADAPTOR ID (UNIT ID) The device address from a SCADA package will be consistent for all conditions, including ZERO (broadcast) EXCEPTION RESPONSE The Adaptor passes on all messages as it receives them, including exception responses. If there is no response on the RS485 line from the slave device then the Adaptor will take no action, and leave it for the host to establish that there was a communication error. MODBUS messages will be deemed complete when there is a 32 bit timeout period. 5

6 5.0 TECHNICAL DETAILS (continued) User settings and parameters HTTP INTERFACE A small web interface program runs on the Adaptor and can be accessed via HTTP using any HTTP compliant browser, pointed to the devices IP address. This allows access to parameters which can be set by the user. Range 0.0 to IP ADDRESS Default The IP address may be changed using the web interface. Following a successful change the Adaptor will reboot. Allow a five second delay for new settings to take effect; the web interface will then be accessible via the new IP Address. BAUD RATE Range 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 57600, Default PARITY Range Default None / Even / Odd None MAC ADDRESS The web interface will display the MAC address for the Adaptor. RESET The Adaptor can be reset to its default settings by holding the reset switch down for three seconds this will reset the user settings to the default values shown in the table above; note that the Adaptor will be rebooted to allow the default settings to be loaded this function is not intended for normal operation, but only when the IP address has been forgotten, so as to allow access to the Adaptor s settings via the HTTP interface. 6

7 5.0 APPROVAL AND CERTIFICATION ATEX GROUP I Group I Hazardous Area Versions RS485 to Ethernet Adaptor TX2123 I M1 Ex ia I Ma (-20 C Ta +40 C) Ex op is I Ma Baseefa09ATEX0341X SPECIAL CONDITIONS FOR SAFE USE The apparatus must be mounted inside inside an enclosure that offers a degree of ingress protection of at least IP54 according to IEC and be suitable for a mining environment. ADDITIONAL CONDITIONS FOR SAFE USE Prior to installation, it is essential that the user refers to the above certificate to ensure that the termination and cable parameters are fully complied with and are compatible with the application. Copies of the certificates are available from Trolex. The power supply used MUST be an intrinsically safe approved type, eg Trolex TX6620 Series. This apparatus complies with the Dielectric Strength Requirements of clause of EN :2007. To comply with I.S. certification, each pair of RS485 conductors must be individually screened. ATEX directive (94/9/EC) EMC directive (2004/108/EC) 7