889P-F4AB-2 A-B Operator unit
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Terminate remote I/O links by setting switch assembly SW3. If you cannot use an 82-Ohm terminator because of devices that you place on your I/O link (see the table below for a list of these devices), you must use 150-Ohm terminators. Using the higher resistance reduces the quantity of devices to 16 that you can place per remote I/O link. Also, this limits your communication rates to 57.6 kbps and 115.2 kbps.
Connect the programming terminal directly to the processor through the D-shell DH+ COMM INTFC connector on the front panel. You can also connect the programming terminal remotely to a DH+ link through the 3-pin connector or at a remote station. Select cables from the options listed below. See chapter 3, “Placing System Hardware,” to determine the lengths that you will need for cables in your system.
Use Belden 9463 twinaxial cable (1770-CD) to connect your PLC-5 processor to remote I/O adapter modules. Connect your I/O devices using: single-conductor wire (analog and some discrete applications) multi-conductor cable (analog and some discrete applications) multi-conductor shielded cable (some specialty I/O modules and low-voltage dc discrete modules)
The structure and details of the product：
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