101-0788 Rabbit Semiconductor, 101-0788 Datasheet - Page 29

• Manufacturer Part Number: 101-0788
• Description: COMPUTER SGL-BOARD OP6600 W/SRAM
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0788

• Module/board Type: Single Board Computer Module
• For Use With/related Products: OP6600
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 101-788; 101-788

The Intellicom comes with a 220 Ω termination resistor and two 680 Ω bias resistors installed
and enabled with jumpers across pins 1–2 and 5–6 on header JP6, as shown in Figure 10.
The bias and termination resistors in a multidrop network should only be enabled on both
end nodes of the network. Disable the termination and bias resistors on the intervening
Intellicom units in the network by removing both jumpers from header JP6. Note that
older versions of the Intellicom do not have this jumper feature, and the surface-mounted
bias and termination resistors shown in Figure 10 have to be removed in networks contain-
ing more than 10 Intellicom units.
User’s Manual
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Figure 10. RS-485 Termination and Bias Resistors
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