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How to wire a 9840 serial cable (RS-232)

The 9840 serial cable comprises normally 6-core screened cable even though only four cores are used and is fitted with a female 9-way D-type on one end and a female 15-way D-type on the other with wiring as follows.

Colour 15 Way 9 Way Function
Green 1 2 TXD
Red 2 3 RXD
White 3 6 DTR
Black 4 5 Serial GND

Although today there is a proliferation of USB connections still numerous industrial applications rely on RS-232 for a dedicated port connection to a measuring device which in this case is the Interface 9840 calibration grade digital load cell indicator. Connecting the 9840 by either serial or USB allows the instrument to be controlled from the Gold Standard data acquisition software.

Last updated: 15 Aug 2012

load cell, loadcell, indicator, serial port, cable, rs-232, rs232,

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