Ingun MA 2x09 Series, Техническое руководство

Страница: 8 / 59

Technical manual MA xxxx with ATS MAxx
7 ©INGUN: Subject to technical changes without notice. E&OE.
Using the test fixture with low-voltage customising the following risk evaluation is given:
W
ARNING
: D
ANGER OF INJURY
!
Electrical dangers due to parts carrying voltage, overload and parts,
that are carrying voltage due to a faulty state
Risk evaluation (according to DIN EN ISO 13849-1) :
Severity of the injury S = S2 serious (normally irreversible injury in-
cluding death)
Frequency and/or
exposure to hazard F = F1 seldom to less-frequent and/or exposure
to hazard is short
Possibility of avoiding
the danger P = P2 hardly possible
This leads to a necessary performance level PL of d.
For voltages greater than 240 Volt the wiring must be designed to take the necessary air and
creepage paths into consideration. Therefore, the permitted voltage stated on the label must not
be exceeded at any time.
Necessary additional functions:

Contact protection for dangerous voltage (see chapter 8.4, page 41)

Actuator for safety switch with and without locking (see chapter 8.7, page 44)
2.1.4 Dangers when operating electromagnets
Within some optional functions electromagnets are used to lock specific positions. When operat-
ing electromagnets with nominal voltage for a long time (>10 minutes) their outside get very hot.
The outer surface of electromagnets reaches high temperatures (70°C +) when nominal voltage
is applied for an extended period of time (>10 minutes).
W
ARNING
: D
ANGER OF INJURY
!
Thermal dangers resulting from hot surfaces
The electromagnets can heat up to 70° C when operated for a long time with
full continuous power supply.

The electromagnetic should not be active when the fixture is not being
used.

Halve the control voltage after approx. one second duty-cycle, i.e. connect
the electromagnet with two channels each and connect a resistor in the
channel for the constant current supply.
Figure 1: Activation with 2 channels
3 C
USTOMISING
The ATS is especially customised for the PCBs/UUTs to be tested. Customising normally con-
sists of spring-loaded test probes (which are installed in receptacles), the UUT/PCB centring,
the UUT/PCB support pins, the pushrods, and possibly further customising parts. Should the
UUT/PCB have side-connectors that need to be contacted, the ATS will additionally be
equipped with a connector approach mechanism (SAM).
The customising of the ATS requires care, as well as a lot of experience. High forces can occur
when there is a large number of test points. These forces can lead to deformation of the probe