Ac Mains connection
changing Ac
operating voltage
This procedure should
be performed only by
qualified technical person-
nel. If you are not quali-
fied, please consult TRUE
Systems or your dealer for
assistance.
CAUTION: To provide
continued protection
against fire, replacement
fuses should be only of
the types listed here. Note
that two () fuses are
necessary and that both
fuses must be of the same
type. AC mains power
cord must be removed
to gain access to Fuse
Drawer for fuse replace-
ment.
PRECISION 8i
Prior to connecting the AC mains power cord to the power Supply Unit,
verify that the Voltage Selector is set for the AC mains voltage in your
area. The currently selected voltage appears in the window on the Fuse
Drawer. It is important that the voltage is set correctly for both safety
reasons and to insure that the PRECISION 8i will operate according to
specifications.
Note also that the correct fuse type must be used. See Table below.
Product damage caused by incorrect voltage settings or fuse selections
cannot be covered under warranty.
1) Using an appropriate AC voltmeter, measure the AC line voltage at
the installation site.
) Make sure the AC power cord is disconnected from the PSUP8i
Power Supply Unit.
) Using a small screwdriver or similar tool, release the latch on the Fuse
Drawer 1 and pull it (and the fuses) out of the AC inlet module.
4) Using a small screwdriver or similar tool, remove the Voltage Selector.
5) Rotate the Voltage Selector to the appropriate position for the AC
voltage measured in Step 1) above. See Table below for proper Voltage
Selector setting. Select the setting that places your measured voltage
nearest the middle of the Operating Voltage Range.
Choosing the right voltage setting and fuses
Setting
Range
100 V
90-110 VAC
10 V
110-1 VAC
0 V
01-40 VAC
40 V
0-4 VAC
Fuse Drawer
TRUE systems
Voltage
adjusted
115
50/0 Hz
50/0 Hz
50/0 Hz
50/0 Hz
Voltage Selector
PSU-P8i
Fuse (IEC 01-)
T 500 mA
50 V
T 500 mA
50 V
T 15 mA
50 V
T 15 mA
50 V
PSU-P8i