User Manual. ASeries A451

Transcription

1 User Manual ASeries A45 Interface Cverter RS-232 RS-45 Multidrop The interfacing specialists

2 A45 User Manual Versi.00 April 2000 COPYRIGHTS All rights reserved. This document may not, in whole or part, be copied, photocopied, reproduced, translated, or reduced to any electric medium or machine readable form without the express permissi in writing from Alfatr Pty Ltd. Copyright 2000 Alfatr Pty Ltd DISCLAIMER Alfatr Pty Ltd has made every attempt to ensure that the informati ctained in this document is accurate and complete. Alfatr Pty Ltd makes no representati or warranties of merchantability or fitness for any particular purpose. Alfatr Pty Ltd reserves the right to make changes to this document at any time, without notice. Therefore, Alfatr Pty Ltd assumes no liability for damages incurred directly or indirectly from errors, omissis or discrepancies with the hardware and the manual. TRADEMARKS All Company and Product names are trademarks of the Company or Manufacturer respectively. WARRANTY Alfatr warrants its products against defects in materials and workmanship for a period of e year from receipt by the customer. All warranty is carried out a return to depot basis unless an alternative warranty coverage has been arranged. WARRANTY EXCLUSIONS The above warranty shall not apply to defects resulting from improper or inadequate maintenance by the customer, unauthorised modificatis or misues, operati outside the envirmental specificatis for the product, damage due to power surges, lightening strikes or any other phenomen outside normal operatial specificatis. Alfatr Pty Ltd ACN: P.O. Box 4 Unit 9/3 New St. Ringwood VIC 334 AUSTRALIA support@alfatr.com.au Web Site:

3 A45 User Manual.0 PRODUCT DESCRIPTION The ASeries A45 is an RS-232 to RS-45 Multidrop interface cverter using standard RJ-45 Ethernet cabling the RS-45 side. On the RS-232 side a DCE/DTE switch is provided for easy reversing of the TD and RD signals. The RS-45 port will support up to 32 drivers and 32 receivers over a cable length of 200 metres at speeds up to 5Kbps.Transient Protecti is also provided the RS-45 lines. Full Duplex (4 wire) or Half Duplex (2 wire) operati may be used RS-45 and internal jumper settings permit the use of either 'standard' or 'crossed' Ethernet cables. The layout of the A45 is as follows: DCE / DTE Selecti RS-232 Port RS-232 RD (Green) Power Jack RS-45 Cnectors ON RS-45 RD (Green) SW DIP Switch Figure - A45 viewed from all sides 2.0 INSTALLATION Before installing the A45 please make sure that the DIP Switch settings are according to the requirement of the RS-45 target device. It is also important to select the RS-232 port as either DCE or DTE. Make sure that all cables are terminated and then insert the power plug into the jack socket and turn the power ON. The A45 is now ready for use. 2. LED indicators The LEDs will operate ly if DIP Switch is set to the 'ON' positi. The RD (RS-232) LED indicator will flash each time data is being received by the Serial RS-232 Port. The RD (RS-45) LED indicator will flash each time data is being received by the RS-45 Serial Port. These LEDs will not operate at any other time.

4 A45 User Manual 3.0 INTERFACE APPLICATION NOTES 3. About the RS-232 Port The RS-232 cnecti is switch selectable as either DTE or DCE. For cnecti to a standard PC with a straight through serial cable, select DCE. When operating the A45 without the power adapter it is necessary to cnect the CTS/RTS and DTR/DSR signals as the power is drawn from these lines. In most applicatis, it is necessary to cnect all of the commly used pins the RS-232 port ( i.e., 2, 3, 4, 5,,, and 20 a DB25 interface ). 3.2 About the RS-45 Port The RS-45 port may be cfigured for either a 4-wire or a 2-wire network. This is de simply be choosing the appropriate jumper setting the cnector JP located behind the RJ-45 sockets, as follows: Pin Descripti of Signal JP Transmit Data Plus (TD+) 2 Transmit Data Minus (TD-) 3 Receive Data Plus (RD+) Standard 4-wire (Factory Default) Receive Data Minus (RD-) Ground Ground Pin Descripti of Signal JP Receive Data Plus (RD+) 2 Receive Data Minus (RD-) 3 Transmit Data Plus (TD+) Transmit Data Minus (TD-) Ground Ground Crossed 4-wire Cfigurati Pin (RD+) ) Descripti of Signal and (TD+ JP 2 (RD-) and (TD-) Ground Ground 2-wire Cfigurati 2

5 A45 User Manual 3.3 Other RS-45 Csideratis When installing an RS-45 2-wire network the RS-45 transmitter must be ctrolled by the RS-232 serial device. This transmitter may be ctrolled by either the RTS/CTS or DTR/DSR signals. If the RS-232 side is using software to ctrol devices then it may require a local echo of what it transmits, if so, turn DIP Switch to the 'OFF' positi. If the distance of the RS-45 device is less than 00metres then it is not necessary to terminate the RS-45 bus. 3.4 Using A45s as RS-232 Line Extenders A pair of A45s may be used to extend the distance at which RS-232 data is transmitted. The A45s are cnected via their RS-45 ports to take advantage of the greater data transfer distances achievable with RS-45. The following examples show how to cnect two A45s together via their RS-45 ports using various cable types. Note that the internal jumper JP must be set as per these diagrams. Example : Using a Standard RJ-45 Ethernet Cable JP Straight Through Cable JP A45 Socket A45 Socket Example 2: Using a Crossed RJ-45 Ethernet Cable JP Crossed Cable JP A45 Socket A45 Socket Note: Using a Crossed Cable requires no changes to the Factory Set JP 3

6 A45 User Manual 4.0 CONFIGURATION OF THE RS-45 PORT 4. RS-45 DIP Switch Settings DIP Switch Functi RS45 transmitter Enabled when DTR/DSR is High RS45 transmitter Enabled when RTS/CTS is High RS45 transmitter ALWAYS Enabled RS45 transmitter NEVER Enabled Mitor Mode DIP Switch Setting Functi O FF RS45 receiver always enabled (local echo for 2-wire RS45) ON RS45 receiver enabled ly when RS45 transmitter disabled OFF ON OFF ON LEDs always OFF. Saves power in 'n powered' operati LEDs indicate RD/TD Data Flow No terminati RS45 receiver 20ohm terminati RS45 receiver 4.2 Factory Default RS-45 DIP Switch Settings RS-45 Transmitter ALWAYS enabled RS-45 Receiver ALWAYS enabled (local echo for 2-wire RS-45) LEDs indicate RD/TD Data Flow No Terminati RS-45 Receiver 4

7 A45 User Manual 5.0 INTERFACE PORT PIN ASSIGNMENTS 5. RS-232 Serial Port Pinout Pin Status Set for DCE Set for DTE Used Frame Ground Frame Ground 2 Input / Output RD TD 3 Output / Input TD RD 4 Linked to Pin 5 CTS RTS 5 Linked to Pin 4 RTS CTS Linked to Pin 20 DTR DSR Used Signal Ground Signal Ground Not used-pulled High 4K DCD DCD 20 Linked to Pin DSR DTR Note: Pins 4, 5,, and 20 are pulled to the correct levels to allow a PC serial port to operate under most cditis without any additial loopback cnectis. 5.2 Factory Default DCE/DTE Switch Setting The Factory Default for the RS-232 Port is DCE. 5.3 RS-45 Serial Port Pinout Pin number for each RJ-45 cnector is shown here in the diagram. The two RJ-45 cnectors are identical in pin assignment and are cnected in parallel. The signals associated with each pin depend the cfigurati of the jumper JP. Please refer to Secti 3.2 for these details. Pin Pin 5.4 Factory Default JP Jumper Setting The A45 is shipped with JP set to Standard 4-wire cfigurati as shown here: JP Standard 4-wire (Factory Default) 5

8 A45 User Manual.0 CABLE GROUNDING Alfatr recommends the use of shielded cable with all of its products. Shielding reduces EMI Radiati and improves noise immunity. This helps minimise interference to other equipment and will improve communicatis reliability.. RS-232 Cable Cstructi The recommended cable cstructi is as follows: Take the shield (surrounding cable wires) and solder it to the Frame Ground (FG) pin. If FG is not available, use Signal Ground (SG) but in this case always use a separate wire for ground which is cnected at both ends. The shield must be cnected at both ends of the cable..2 RS-45 Cable Cstructi While the RS-45 differential signal does not require a ground signal for communicati, we recommend that a ground wire is always cnected in an RS-45 Multidrop Network. The lger distances available with RS-45 can present significant differences in the voltage levels of the 'Ground' signal. This can lead to loss of data and at the extreme, cause damage to the equipment..0 CABLE EXAMPLES. RS-45 Cable from A45 to User Device Pin A45 Socket RJ-45 Standard 4-wire (Factory Default) Pin Pin 2 Pin 3 Pin Pin TD+ TD- RD+ RD- GND RD+ RD- TD+ TD- GND User Device

9 A45 User Manual.2 RS-232 Cnecti to a PC with a DB-25 Serial Cnector Shield A45 Cable End DCE (DB-25 Male) FG RD 2 TD 3 CTS 4 RTS 5 DTR SG DCD DSR FG TD RD RTS CTS DSR SG DCD DTR PC Cable End DTE (DB-25 Female).3 RS-232 Cnecti to a PC with a DB-9 Serial Cnector Shield A45 Cable End DCE (DB-25 Male) RD TD CTS RTS DTR SG DCD DSR TD RD RTS CTS DSR SG DCD DTR PC Cable End (DB-9 Female).4 RS-232 Cable for Other Devices Shield A45 Cable End DCE (DB-25 Male) FG RD TD CTS RTS DTR SG DCD DSR FG TD RD RTS CTS DSR SG DCD DTR User Device Cable End

10 A45 User Manual.0 SPECIFICATIONS RS-232C Port: Asynchrous RS-232C/V.24 Select as DCE or DTE DB-25 female cnector Speed capability dependant cable length up to 4k bits per secd RS-45 Port: RS-45 Two RJ-45 cnectors for multidrop setup Switchable 20ohm Terminati for RD line LED Indicators: Receive Data - RS-232 (Green) Receive Data - RS-45 (Green) Power Supply: 9V (200mA) DC Power Adapter Reverse polarity protecti Plug jack - 5.5mm outer/2.5mm inner diameter Polarity is Outer Negative Dimensis: 4mm x 5mm x 23mm Weight: 0 grams Operating Temperature: 0 to 35 C Stroage Temperature: 0 to 45 C All specificatis subject to change without notice

11 N42 DECLARATION OF CONFORMITY according to the European Commissis EMC Directive 9/33/EEC We, Name of Manufacturer: ALFATRON PTY. LTD of, Address of Manufacturer: UNIT 9, 3 NEW ST. RINGWOOD VIC 334 AUSTRALIA Australian Company Number: ACN: declare under sole respsibility that the product: Product Name: Model Number: ASeries RS-232 < > RS-45 Interface Cverter A45 to which this declarati relates is in cformity with the following standards: CISPR-22 / EN class B IEC 0-2 / pren IEC 0-3 / pren IEC 0-4 / pren EMI from Informati Technology Equipment (ITE) Electro Static Discharge Immunity Radiated RF Immunity Electrical Fast Transients Immunity