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USER
MANUAL
MODEL 2085
High Speed RS-232
to RS-485 Interface
Converter
SALES OFFICE
Part# 07M2085-D
Doc# 047033UD
(301) 975-1000
Revised 4/15/97
TECHNICAL SUPPORT
CERTIFIED
(301) 975-1007
An ISO-9001
http://www.patton.com
Certified Company
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1.0 WARRANTY INFORMATION 1.3 SERVICE Patton Electronics warrants all Model 2085 components to be free from defects, and will—at our option—repair or replace the product All warranty and non-warranty repairs must be returned freight should it fail within one year from the first date of shipment. prepaid and insured to Patton Electronics. All returns must have a This warranty is limited to defects in workmanship or materials, and Return Materials Authorization number on the outside of the shipp
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+RCV- G -XMT+ 2.0 GENERAL INFORMATION 3.0 CONFIGURATION Thank you for your purchase of this Patton Electronics product. The Model 2085 is configured using an eight position DIP switch This product has been thoroughly inspected and tested and is and a DCE/DTE switch. Figure 1 (below) shows the location of the warranted for One Year parts and labor. If any questions or problems DCE/DTE switch (externally accessible) on the PC board, as well as arise during installation or use of this product,
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ON 3.3 DIP SWITCH SETTINGS ON All possible settings for the Model 2085’s configuration switches are presented in Figure 5 (below). Following Figure 5 is a detailed 123456 7 8 description of each switch function. If you have additional questions, contact Technical Support at (301) 975-1000. OFF Figure 3. Close-up of DIP switch showing “ON” and “OFF” positions S1 SUMMARY TABLE Position Function Factory Default 3.1 SETTING THE DCE/DTE SWITCH S1-1* “Transmit Off” Impedance Off High Z For your co
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S1-4: Echo Mode 3.4 CONFIGURATION SWITCH APPLICATIONS The setting for switch S1-4 determines whether the Model 2085 The switch settings generally needed to configure the Model 2085 echoes data back to the transmitting device (half-duplex mode only). for various applications are shown in the table below. Note: Do not change switch settings until you have carefully read Section 3.3. S1-4 Setting On Echo On TYPICAL MODEL 2085 APPLICATIONS Off Echo Off Point-to-Point Multi-point Switch Settings
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4.0 INSTALLATION 4.1.2 4-WIRE CONNECTION USING RJ-11 OR RJ-45 Once you have properly set the configuration switches, you are The RJ-11 and RJ-45 connectors on the Model 2085's RS-485 side ready to connect the Model 2085 to your system. This section tells you are pre-wired for a standard TELCO wiring environment. The signal/pin how to properly connect the Model 2085 to the RS-485 and RS-232 relationships are shown below: interfaces, and how to operate the Model 2085. RJ-11 SIGNAL RJ-45 SIGNAL
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4.1.3 4-WIRE CONNECTION USING TERMINAL BLOCKS 6. If there is a shield around the telephone cable, it may be connected to "G" on the terminal block. We recommend connecting the If your RS-485 application requires you to connect two pairs of bare shield at the computer end only to avoid ground loops. A ground wire is wires to the Model 2085, you will need to open the case to access the not necessary for proper operation of the Model 2085. terminal blocks. The following instructions will tell y
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9. Insert the strain relief assembly with the wire going through it 2085 SIGNAL RS-485 SIGNAL into the slot in the bottom half of the modem case and set it into the XMT+....................................+ recess in the case. XMT- .....................................- The above wiring pattern applies regardless of whether you are making the RS-485 connection via DB-25, RJ-11, RJ-45 or terminal blocks. For specific wiring instructions, please refer to the previous pages of Section 4. 4.2 W
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APPENDIX A 4.2.2 DAISY CHAIN TOPOLOGY PATTON MODEL 2085 SPECIFICATIONS Using a daisy chain topology, you may connect several Model 2085s together in a master/slave arrangement. Maximum distance between the units will vary based upon the number of drops, data rate, Transmission wire gauge, etc. Call Technical Support for specific distance estimates. Format: Asynchronous Data Rate: Up to 115,200 bps Figure 8 (below) shows how to wire the two-pair cables properly for Range: Up to 9 miles a Mode
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APPENDIX B Dear Valued Customer, PATTON MODEL 2085 RS-232 PIN CONFIGURATIONS Thank you for purchasing Patton Electronics products! We do appreciate your business. I trust that you find this user manual helpful. DIRECTION “DCE” SETTING DIRECTION We manufacture one of the widest selections of data communications 1- (FG) Frame Ground products in the world including CSU/DSU's, network termination units, 2- (TD) Transmit Data To Model 2085 powered and self-powered short range modems, fiber optic
