2-4. Power Requirements.
The Model 455 requires a power source of 105V-130V 50-60Hz or 210V-250V 50-60Hz.
Power consumption is:
Transmitter.................. 24 VA maximum.
Receiver..................... 20 VA maximum.
2-5. Line Voltage Selection.
CAUTION
Before connecting ac power to this equipment, make sure it is set to the line voltage of the power
source. Also ensure that the common connection of the power outlet is connected to a protective
earth contact.
___________
_ WARNING _
___________
Line voltage selection is made at the ac plug-in receptacle on the rear of the shelf. This
should be done by trained service personnel only. To avoid electrical shock, make sure
the power cord is disconnected before changing the voltage selection pc board. Before
connecting this device to the power source, verify that a protective earth ground
connection is provided through the grounding conductor of the power cord. The protective
ground connection through the power cord grounding conductor is essential for safe
operation.
The Model 455 is shipped from the factory with the line voltage selection set for 105-130 Vac. If
it is necessary to change the line voltage selection, access to the voltage selection pc board can be
accomplished by:
*Removing the ac cord.
*Open the cover door, rotate the fuse-pull to the left, removing the fuse.
*Remove the pc board. Select operating voltage by orienting the pc board to position
desired voltage on top-left side. Push board firmly into module slot.
*Rotate fuse-pull back into normal position and re-insert fuse into holder, using caution to
select the proper fuse value.
455 Operation Manual
Page 12
6/23/98
