AC15QTP And AC20QTP Operations Manual....
35
6.5
REMOTE COMMUNICATIONS, cont.
6.5.1 RS-232C/SCPI
The RS-232C serial port is located to the right of the CONVERTER POWER output connections
on the converter side wall (see Figure 5 on page 21).
The RS-232C TxD signal originating in the converter is approxi15V when “High” and -
15V when “Low.” The RS-232C GND (ground) wire is connected to the low voltage DC
common of the converter power supply system, which is normally also connected to the chassis-
ground of the converter. When the Metering Isolation Option is installed in the converter, the
link to the chassis ground is removed.
The RS-232C serial port is a DE9S (female, 9-pin D-subminiature connector). The pinout of the
connector is standard for an RS-232C DCE. Figure 8 below demonstrates connection from a
DCE to a DTE. Use of a shielded, jacketed, four-wire (two twisted pairs), color-coded cable for
each converter in the system is required.
FIGURE 10: RS-232C PINOUT