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2. General description of function
2.1 Description of operation
The internal block diagram of LE-50PAU power amplifier is as shown in page 8.
1. Role of DIP switch
• SW1
Keep the SW1 turned on all times under the power amplifier mode and manual power mode.
( For case to turn it off, refer to the chapter-2.)
• SW2, SW3
These switches are prepared to set the input signal level, and are as shown at following table.
If the SW2 has been turnded on, it is readily possible to select 0 ~ 5V or 0 ~ 8V.
• SW4 ~ SW10
These switch are used to determin the full-scale value of output current.
When the SW5 ~ SW9 are turned on, for example, the full-scale value of output current will be
3.6A. Select the rated current, depending on the type name of clutch / brake used in combination.
Note that the 24VDC voltage output mode is set when all DIP switches (SW4 ~ SW10) are turned
on.
• The ON / OFF status of each SW is read when the power source is turned from off to on.
Even if the switch is changed over while the power source is turned on, the function remains invalid
until the power source is turned from off to on again.
2. Description of internal circuit
• The signal voltage input to across input terminals [SA] - [SN] is output to the clutch / brake through the
amplifires A1, A2, A3.
• The amplifire A1 is prepared to set the input signal level.
"Vmax" is set to 5V, 8V, or 5 ~ 8V, using the DIP switches SW2 and SW3.
4.0
ON
1
2
3
4
OFF
Output current
integer value
Input mode
SW.2 SW.3
ON
ON
OFF
ON
OFF
OFF
Operation mode
SW.1
ON
Power amplifier
OFF Semi-automatic tension control (See chapter-2)
2.0
1.0
0.8
0.4
0.2
5
6
7
8
9
Output current
decimal value
24VDC voltage mode when
all switchs are turned ON.
Input mode
Input voltage ( 0~5V )
When use for power amplifier
Input voltage ( 0~8V )
When use for manual power source
Input voltage ( 0~Vmax )
Special mode
Operation mode
6
Setting current (A)
0.1
10
SW No.
( Vmax = 0~5V ) free-mode
Set to ON
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