Reference Guide
Dell™ C8621QT RS232 External Control
1. Application
This document denes the communication method for control of the Dell LCD display C8621QT when
using an external controller.
2. Connectors and wiring
2.1 RS-232C Remote Access
Connector: 9-pin D-Sub
Cable: Straight cable or null modem cable
RS232 Pin Assignment (Facing Display)
This display uses RXD, TXD and GND lines for RS-232 control.
Note 1: The RS232 cable is not provided by Dell.
2.2 LAN control
Connector: RJ-45 10/100 BASE-T
Cable: Category 5 or higher LAN cable
RJ45
RJ45
LAN cable
Note 2: The LAN cable is not provided by Dell