and the R3BLSO-lC/R5BLSO-lC (figure 13-22)
assembly. The assemblies differ from each other in the
front panel organization and in the wiring module
capabilities. The panels provide different arrangements
of 20-pin, 38-pin, 117-pin, and 120-pin connectors.
Both types of linear switches have similar
mechanism and contact assembly modules. The
mechanism assembly module contains the drive motor,
the control circuit module, and the control transformers
for remote operation of the switch. The contact
assembly module consists of a stationary control plate
and a moveable plate to perform the switching
The linear switches perform either three-position
(R3) or five-position (R5) switching functions. The
three-position switches are used for NORMAL/
ALTERNATE configuration switching with an OFF
position for circuit isolation. The five-position
switches have an OFF position with the four other
switch positions being used for circuit configuration or
reconfiguration. For an example, see figure 13-23.
One channel of a duplexed magnetic tape unit can be
switched between four separate CDS IOC channels or
isolated in the OFF position.
The front panels of both types contain a
REMOTE-MANUAL toggle switch. When the switch
is in the REMOTE position, the CSCP has control of
the switch position (normal operating mode). When the
toggle switch is in MANUAL, the switch must be
positioned using the switch handle.
Switch Control and Potential Transformer
The switch control and potential transformer action
cutout (ACO) assembly (figure 13-24) provides control
voltages for bench testing of the linear movement
switches. The control voltages are provided through
test cables from the test jack to the linear switch
assembly under test.
Figure 13-22.R3BLSO-1C/R5BLSO-1C linear movement switch assembly.