Operating The Hm8001; General Information; Maximum Power Supplied; Programming - Hameg Mainframe HM8001-2 Manual Del Usuario

O p e r a t i n g t h e H M 8 0 0 1 - 2

Operating the HM8001-2

General Information

Apart from the plug-in modules of the HM8000
Modular System, self-designed modules can also
be operated using the blank HM800. However, the
maximum power and voltage levels must not be
exceeded.
Attention!
When operating self-designed
modules, the power consumption per
module must not exceed 25 Watts.
Each module compartment of the mainframe
HM8001-2 contains a 22 pole multipoint connector,
by means of which the inserted module is connected
to the corresponding operating voltages. Apart from
the fixed 5 V all other DC voltages can be
DC
programmed from the module using resistors and
wire connectors.
The operating voltages of the modules are inde-
pendent from each other and adjacent modules
do not influence each others functions. Therefore,
no modifications are necessary to the mainframe
for the supply voltage of each individual module.
Refer to the programming instructions for furt-
her details.

Maximum Power supplied

The maximum total power output of each
mainframe is 36 Watts. Loads which draw excessive
power will activate the transformer's safety shut-
down protection until removed. The 8000 series
modules use less than 11 Watts of power each
18
Subject to change without notice
under normal circumstances, with the exception
of the Power Supply HM8040-3, which requires
25 Watts and should not be used in conjunction with
another HM8040-3 module under full load.

Programming

Except for the fixed +5 V, all other regulated DC
voltages available in the mainframe HM8001-2 can
be programmed on the modules PCB connector by
means of a resistor and wire connector. These are
already incorporated into all complete modules.
The reference voltages, precisely calibrated during
manufacture, ensure a high recurrence accuracy
of the output DC voltages if a low tolerance re-sistor
is used for programming. Without the resistor each
output (contacts 8 – 7 or 15 – 14) supplies +5.2 V
provided that a wire connector has been mounted
on the modules PCB connector (contacts 13 – 11
or 20 – 18).
Higher voltages can be programmed according
to the following table:
V Wire
0
across 8 + 7 connector
(or 15 + 14) across
5.,2 V
10 V 13 + 11
12 V 20 + 18
15 V
18 V 13 + 11
20 V 20 + 19
The R resistor can be calculated using the
s
following equation:
18.8
R = ————— (R in kΩ / V
s s
V – 5.2
0
,
DC
Resistor R
s
across 8 + 9
(or 15 + 16)
no resistor
3.92 kΩ
2.80 kΩ
1.91 kΩ
1.5 kΩ
1.3 kΩ
in V)
0