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D. PENDANT CONTROL MALFUNCTIONS
INTRODUCTION
There are four (4) electrical switches associated with the MLS-460 Pendant Assembly. These components are
interfaced to TB1 of Main Electrical Enclosure through two (2) disconnects and two (2) junction boxes.
The Pendant Assembly is remote control for Loading or Unloading the MLS-460. The functions provided are:
LOAD - LEVEL - UNLOAD
TUMBLER REVERSE
TUMBLER FORWARD
EMERGENCY STOP (E-Stop)
The following information will provide a means to respond to Pendant malfunction, and to verify ALL its
electrical signals. Refer to the following MLS-460 Pendant associated wiring diagrams for detailed assembly and
wiring information.
MLS-460 PENDANT ASSEMBLY DIAGRAM
MLS-460 ANNUNCIATOR, PENDANT, AND UPPER RTDS WIRING DIAGRAM
1.0 Pendant Electrical Components
LOAD - Level - UNLOAD ------------------ A and B
Tumbler Reverse Switch----------------------- PB2
Tumbler Forward Switch ---------------------- PB1
EMERGENCY STOP (E-Stop) Switch -- PB6
There are two (2) normally open electrical switches associated with this switch function, that are actuated
by three (3) position selector.
SEL A = LOAD
SEL B = UNLOAD
Once this switch is turned to LOAD, the dryers front doors will open, and depending upon system
configuration, will either tilt back or remain level.
If the MLS-460 was configured to UNLOAD from the front: Any time this switch is turned to
UNLOAD, the dryers front doors will open, and its tumbler (basket) will tilt to the front.
If the MLS-460 was configured to UNLOAD from the rear: Any time this switch is turned to UNLOAD,
nothing will happen. ALL unloading functions will be transferred to the rear control panel.
TUMBLER REVERSE PENDANT --- PB2
This push button comprises of one (1) normally open switch, and is mechanically interlock with the
Tumbler Forward Push-Button.