Controls; Description Of The Rear Panel; Working - ELC AL 991s Manuel D'instructions

5.2 CONTROLS

5.2.1 Description of the rear panel

A: RS 232 SOCKET
A: MAINS RECEPTACLE
B: FUSEHOLDER with T1.6A FUSE
The fuse (5 x 20mm T1.6A ) can be replaced by a
fuse of same type and features.
5.2.2 Controls description of the front panel
(1) «ON-OFF» SWITCH. "On" position, the power supply can work. "OFF"
position, the power supply can not work.
(2) A OUTPUT SOCKETS. They give 2 symmetrical voltages, adjustable from
0 to ±15V with a current of 1A with reference to the COM terminal (4) or from
0 to 30V with reference to the -15V terminal.
(3) SELECTION WARNING LED OF THE A OUTPUT. The switched on led
indicates the selection of the A output for setting and display of its value with
the indicator (10). Indicates also by its flashing that this output is in overload.
(4) COMMON SOCKET. Reference terminal common to all outputs.
(5) B OUTPUT SOCKET. Provides a voltage adjustable from +2V to +5.5V with
a maxi current between 1 and 3A.
(6) SELECTION WARNING LED OF THE B OUTPUT. The switched on led
indicates the selection of the B output for setting and display of its value with
the indicator (10). Indicates also by its flashing that this output is in overload.
(7) C OUTPUT SOCKET. Provides a voltage adjustable from -15V to +15V with
a maxi current of 0.2A.
(8) SELECTION WARNING LED OF THE C OUTPUT. The switched on led
indicates the selection of the C output for setting and display of its value with
the indicator (10). Indicates also by its flashing that this output is in overload.
(9) SAFETY FUNCTIONAL EARTH SOCKET. Allows to take the Earth as
reference for your mounting. This socket is directly earthed from the frame.
(10) OUTPUTS SELECTION. Allows to choose the output to be displayed. A
press on the button makes the selection move in the way A - B - C - A - ...
B
A
C
(11) INDICATOR. Displays the value of the output selected by (9). Indicates also
if the outputs are in overload.
(12) +0.1V VOLTAGE SETTING. A press on the button increases the voltage
of the selected output of 0.1V.
(13) -0.1V VOLTAGE SETTING. A press on the button decreases the voltage
of the selected output of 0.1V.
(14) +1V VOLTAGE SETTING. A press on the button increases the voltage
of the selected output of 1V.
(15) -1V VOLTAGE SETTING. A press on the button decreases the voltage
of the selected output of 1V.

5.3 WORKING

On the swiching on, the power supply provides the output value, which was selected
on the previous use. All adjusted voltages are stored automatically. So, in the case
of an unforeseen stop or a supply disconnection, the settings are maintained, when
the power supply is switched on again.
- To select the output to set with the (9) button and the (3), (6), and (8) warning leds.
- To select the voltage with the (11) to (14) buttons.
- To connect the load between the COM terminal and the one of the adjusted output.
- To repeat the process for the other outputs.
All outputs are available simultaneously. An output can be adjusted, while the other
ones work.
In order to have a power supply adjustable from 0 to+30V, you have to
connect the load between the -15V and +15V sockets. In this configuration, you
can not use the 2 other power supplies with the same mounting anymore,
because the reference is not the same. You have to multiply the value on the
indicator, as well as the setting by two.
OUTPUT A
0 to 30V
- 9 -
COM OUTPUT B OUTPUT C
+2V to +5.5V
0 to +15V
-15V to +15V
0 to -15V