1-14. MISCELLANEOUS CONTROL DEVICES
(1) BATTERY SWITCH (BS). Battery switch provides protection for the battery. It must be closed during operating
periods, and opened when the locomotive is shut down to disconnect the battery from the electric circuits.
(2) CONTROLLER MECHANISM (CM). The controller mechanism contains the throttle handle and the reverse handle.
The throttle controls the power and speed, and the reverser the direction of movement of the locomotive. The
throttle has 10 positions: STOP, IDLE, and eight running notches. The reverser has FORWARD, FORWARD, and
NEUTRAL positions. The reverser controls the coil circuits of the power contactors and the reverser switches. The
throttle controls the coil circuits of the throttle operator magnetic valves and helps control the coil circuits of the
battery field and shunt field contactors. The control handles are interlocked so that the following conditions exist:
Throttle handle not in IDLE or STOP reverser handle locked.
Reverser handle removable with throttle handle in IDLE only.
Removing reverser handle locks throttle handle in IDLE.