Honeywell MRP-2002 Instruction Manual

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Honeywell MRP-2002 Instruction Manual Manual pdf 37 page image

MRP-2002 Series Instruction Manual — P/N 53049:E5 7/28/2016 37ANN-BUS Devices InstallationException: When using the ANN-RLY module, the installer must ensure that the maximum24VDC power line drop does not exceed 0.3 volts. This results in the following wiring limitations: Wiring Distance Calculation Example:Suppose a system is configured with the following ANN-BUS modules:• 2 ANN-80 Remote LCD Annunciators• 1 ANN-S/PG Serial/Parallel Printer Interface Module• 1 ANN-I/O LED Driver ModuleThe total worst case current is calculated as follows:Using this value and referring to the Wiring Distance Table 2.1 on page 36, it can be found that theavailable options are: 463 feet maximum using 22 Gauge wire 1,172 feet maximum using 18 Gauge wire 1,866 feet maximum using 16 Gauge wire 2,953 feet maximum using 14 Gauge wireWire Gauge Ohms per 1,000 feet (Rpu)22 16.218 6.416 4.0214 2.54Wire Gauge Maximum Wire Length18 312 feet16 497 feet14 787 feet12 1,250 feetANN-80 Current Draw = 2 X 0.040 amps = 0.080 ampsANN-S/PG Current Draw = 1 X.0.040 amps = 0.040 ampsANN-I/O Current Draw = 1 X.0.200 amps = 0.200 ampsTotal Worst Case Current Draw = 0.320 amps