Computone IntelliServer RAS 2000 PowerRack Hardware Manual page 29

Cable for Terminals with DTR Flow Control
Figure 3-4:
Notes:
The cable shown in Figure 3-4 assumes that the terminal or other devices uses
1.
its RTS signal for flow control. Many terminals use DTR instead. If this is the
case, you will need to connect the terminal's DTR to the RAS 2000's CTS,
and configure the port for CTS flow control.
Terminals that use DTR for flow control often use RTS to indicate that the ter-
2.
minal is turned on. That is why the diagram on this page shows the DB-25's
RTS signal connected to the PowerRack's CD signal. This can be used for
logging off when the terminal powers down.
CAUTION: At some installation sites, it may be necessary to connect the chassis ground at one
end of the cable but not at both ends. This is because the "earth ground" connection
through the power source is not always perfect, and different "earth grounds" at dif-
ferent locations may have a voltage potential between them. If you connect the two
devices together through the cable shield or chassis ground pin, current will flow
through the shield and damage your hardware.
RAS 2000 PowerRack Hardware Guide
Cable Pin-outs for Terminals w/DTR Flow Control
Page 3-9