Computone IntelliServer RAS 2000 PowerRack Hardware Manual page 30

CAUTION: At some installation sites, it may be necessary to connect the chassis ground at one
WARNING: When using this cable, you should avoid powering down the terminal while it is
Page 3-10
Cable for Local Terminals Using Xon/Xoff Flow Control
Cable Pin-outs for Terminals Using Xon/Xoff Flow Control
Figure 3-5:
Notes:
Since the terminal is using XON/XOFF flow control, the RTS/CTS signals
1.
are not used.
The DTR/CD signals are not used because the local terminal should always
2.
be connected and turned on.
On the terminal side, DTR is connected to CTS. Many terminals will not
3.
operate unless their CTS, DSR, or DCD inputs are asserted. To reduce the
wires in the cable, we use the terminal's DTR and RTS to satisfy these inputs.
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.
running an application. Since the DTR and CD signals are not used, the RAS 2000
PowerRack (and the host system) will not know that the terminal has been turned
RAS 2000 PowerRack Hardware Guide