Cooper Instruments & Systems DFI 250X Digital Weight Indicator - Manual (Page 7)

CF 146 5 V- Rev. 1.0 - 003R-620-100
RS-232 - Instrument to PC using COM Port (DB25)
6.4.2 Printer Connections (RXD/TXD, GND and DTR)
RS-232 – Instrument to Printer (DB25)
6.4.3 Remote Display (TXD, GND)
•
Connect TXD to RXD and GND to GND on the remote display.
6.4.4 Remote Input
•
The indicator requires a voltage free contact between TXD and RXD to enable the remote input (i.e.
SPEC:REM.FN).
Note: The remote input will not function when in setup or when using the GSE-LINK.
WARNING
The remote input is a
voltage free contact (e.g.
button, mechanical
relay). Connection of
any active circuitry may
damage the instrument.
6.4.5 Outputs
•
Output drivers for the instrument are isolated open emitter transistor drives that are capable of driving up to a
total of 300mA.