USER MANUAL MODEL 2089 Ultra-miniature, DB-9 EIA/TIA-574 to RS-485 Interface Converter SALES OFFICE Part# 07M2089-E Doc# 047043UE (301) 975-1000 Revised 6/25/98 TECHNICAL SUPPORT C E R T I F I E D (301) 975-1007 An ISO-9001 http://www.patton.com Certified Company...
However, there is no guarantee that interference will not occur in a particular installation. If the Model 2089 does cause interference to radio or television reception, which can be...
2.2 DESCRIPTION The Model 2089 EIA/TIA-574 to RS-485 interface converter Figure 1. Underside of Model 2089 main PC board, showing the location of DIP switch S1. provides exceptional versatility in an ultra-miniature package. Requiring no AC power or batteries for operation, the Model 2089 supports asynchronous communication up to 115.2 Kbps over one or...
3.1.2 DIP SWITCH S1 SETTINGS To access the Model 2089’s internal PC boards, insert a small flat- blade screwdriver between the connector and the lip of the case and DIP switch S1 is used to configure receive impedance, twist gently as shown in Figure 3 (below).
S2-4: “Xmt Off” Imp. S2-2: RTS/CTS Delay The setting for switch S2-2 determines the amount of delay between the time the Model 2089 “sees” RTS and when it sends CTS. Note: RTS/CTS Delay setting should be based upon transmission timing.
If your application requires you to connect one or two pairs of bare wires to the Model 2089, you will need to open the case to access the terminal blocks. The following instructions will tell you how to open the...
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4.1.2 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45 The RJ-11 and RJ-45 connectors on the Model 2089’s twisted pair interface are pre-wired for a standard TELCO wiring environment. The signal/pin relationships are shown below:...
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† 6-----------------------1 † Figure 5 (below) shows how to wire the two-pair cables properly for † Connection to ground is optional a Model 2089 star topology. Note that the ground connection is not needed. RJ-45 Cable (4-Wire) SIGNAL PIN# PIN#...
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CTS turns “ON” after the terminal raises port of an EIA/TIA-574 DTE device (PC, laptop, host). If you must use RTS. a cable to connect the Model 2089 to the DTE device, make sure that it RTS/CTS Delay: 8 mSec or “no delay”...
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Patton Electronics Company 7622 Rickenbacker Drive Gaithersburg, MD 20879 USA We are committed to a quality product at a quality price. Patton Electronics is BABT and ISO 9001 certified. We meet and exceed the highest standards in the industry (CE, UL, etc.).
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