Computone IntelliServer RAS 2000 PowerRack Hardware Manual page 32

CAUTION: At some installation sites, it may be necessary to connect the chassis ground at one
Page 3-12
The RAS 2000 PowerRack's DTR is connected to the printer's DSR and CD
3.
inputs, and the RAS 2000's RTS is connected to the printer's CTS input. This
is done because some printers will not operate properly unless these inputs are
asserted. Check your printer manual to see if these connections are required
for your printer.
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.
Cable for Connecting to a DB9 Com. Port on a PC
Cable Pin-out for Connecting to a DB9 Com. Port on a PC
Figure 3-7:
Notes:
This pin-out is functionally similar to the standard DTE cables shown in
1.
Figure 3-3, adjusted for the fact that the DB9 connector uses different pin-
outs.
RAS 2000 PowerRack Hardware Guide