Patton electronic RS-485 manual

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Table of contents for the manual

  • Page 1

    USER MANU AL MODEL 285 and 285S RS-232 to RS-485 Interface Converters SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 http://www .patton.com Part# 07M285-B Doc# 047012UB Revised 9/29/93 Revision C and above[...]

  • Page 2

    1.0 WARRANTY INFORMA TION Patton Electronics warrants all Model 285 components to be free from defects, and will—at our option—repair or replace the product should it fail within one year from the first date of shipment. This warranty is limited to defects in workmanship or materials, and does not cover customer damage, abuse, or unauthorized m[...]

  • Page 3

    3.0 CONFIGURA TION The Model 285 is configured using six PC board mounted switch- es. Figure 1 (below) shows the switch locations, along with the loca- tion of the terminal blocks and optional surge protectors: 3.1 SETTING THE DTE/DCE SWITCH For your convenience, the Model 285 has an externally accessi- ble DTE/DCE switch (see Figure 2, below). If [...]

  • Page 4

    3.2.1 CONFIGURA TION SWITCH FUNCTIONS The table and descriptions below detail the functions of the five configuration switches. Read this information carefully before setting the switches. SW1-1: RTS/CTS Delay: Switch 1-1 determines how long cir- cuit CB (CTS) takes to become active after RTS is asserted (DCE Mode only). RTS delay of 8 mSec will gi[...]

  • Page 5

    4.1.2 4-WIRE CONNECTION USING RJ-1 1 OR RJ-45 The RJ-1 1 and RJ-45 connectors on the Model 285's RS-485 side are pre-wired for a standard TELCO wiring environment. The signal/pin relationships are shown below: RJ-1 1 SIGNAL RJ-45 SIGNAL 1 ...................GND* 1 .................N/C 2 ...................RCV- 2 .................GND* 3 .......[...]

  • Page 6

    4.1.3 4-WIRE CONNECTION USING TERMINAL BLOCKS If your RS-485 application requires you to connect two pairs of bare wires to the Model 285, you will need to open the case to access the terminal blocks. The following instructions will tell you how to open the case, connect the bare wires to the terminal blocks, and fasten the strain relief collar in [...]

  • Page 7

    9. Insert the strain relief assembly with the wire going through it into the slot in the bottom half of the modem case and set it into the recess in the case. 10. BEND the top half of the case as necessary to place it over the strain relief assembly . Do not snap the case together yet. 1 1. Insert one captive screw through a saddle washer and then [...]

  • Page 8

    APPENDIX A SPECIFICA TIONS T ransmission Format: Asynchronous Data Rate: Up to 1 15,200 bps T ransmit Line: 2, 4 wire unconditioned twisted pair T ransmit Mode: Full or half duplex T ransmit Level: 0 dBm Range: Up to 9 miles Control Signals: DSR turns "ON" immediately after the terminal raises DTR; DCD turns "ON" after recognizi[...]

  • Page 9

    A PPENDIX C BLOCK DIAGRAM 15[...]