
METALJET D2+
INSTALLATION
Revision 19, November 2016
Page 4-26
Interlock
is a
HR10A-7P-4S
from HIROSE. It gives access to the two loops that will be closed when all radiation
shielding covers including the shutter and the upper cooling block are mounted.
Shutter
is a male 26-pin high-density D-sub connector (DB26HD). It is used to control the shutter and to detect
the state of the shutter. It can also be used to detect the state of the pull wire, see below, and to drive optional
warning lamps
that connect to the RJ45 socket labeled “Display”
.
The shutter actuator contains of a 24V solenoid (Hubmagnet HM 207), and a flyback diode mounted internally
to handle inductive voltage spikes from supply power changes.
The shutter needs to be driven by a “pull in and
hold circuit”. A pull
-in current source of 1.5 A for 0.5 s and then a hold current of 0.5 A is needed for the
shutter to be opened. This is typically achieved by constant current source with a current level switch
controlled by a timer. If the shutter driver current is turned off the shutter will automatically close.
The three optical sensors (OPB960N51) are typically driven with separate current limited DC frequency signals.
Each light emitting diode emits
pulses of invisible infrared light when energized by the light curtain’s timing and
logic circuitry. The purpose of using different frequencies is to eliminate potential crosstalk. Sensor side logic
should then be built to remove the added frequency signal to get the actual state of the sensor.
Note: The shutter that Excillum supplies only includes the actual actuator and sensors and does NOT include
any drivers or adaption logic.
Pull wire
is a female RJ45 connector. It connects to the pull wire that is strapped to the high-voltage cable and
can be used to control the mains supply to the high voltage generator. The purpose is to make it impossible to
remove the high-voltage cable without disconnecting the pull wire. Presence of the pull wire is detected from
the 26-pin high-density D-
sub connector labeled “Shutter”.
Display
is a female RJ45 connector. It can be used to connect a small warning display. We suggest a small
moveable display that can be placed close to the MetalJet D2+ source somewhere where it is clearly visible by
the user of the source.
Excillum document “P
-029-0001 -
Electron gun safety system interface”
is appended to this operating manual.
It shows a detailed schematic for the connectors described above.