EVA
Manual
27
118144
‐
001
REV.
A
An
alternate
method
of
controlling
the
output
remotely
is
by
using
external
resistance
such
as
a
potentiometer
or
a
resistor
network.
See
Figure
6.4
for
more
details.
REMOTE
MONITORS
:
Test
points
(monitors)
are
made
available
on
the
rear
panel
interface
connecter
for
monitoring
the
Emission
(beam)
Current
and
Filament
Current;
pin
6
and
pin
5
respectively.
The
test
points
are
always
positive,
scaling
is
such
that
0
‐
10Vdc
corresponds
to
0
‐
100%
rated
output.
Test
points
have
an
output
impedance
of
4.99k
ohms,
±1%.
See
Figure
6.5
for
more
information.
LOCAL/REMOTE:
BEAM
ON/BEAM
OFF
:
Allows
for
command
of
BEAM
ON
and
BEAM
OFF
by
either
the
front
panel
controls
or
external
signals
via
the
rear
panel
25
pin
external
interface
connector.
LOCAL
CONTROL
‐
For
local
front
panel
command
of
the
BEAM
OFF
functionality
a
maintained
connection
between
pin
14
and
pin
15
is
required.
REMOTE
CONTROL
–
Remote
control
of
BEAM
ON
and
BEAM
OFF
can
be
accomplished
via
the
rear
panel
interface.
BEAM
OFF
and
BEAM
ON
are
controlled
by
momentary
normally
closed;
normally
open
contacts,
respectively
between
pins
14
and
15,
and
pins
15
and
16.
See
Figure
6.6
for
more
details.
EXTERNAL
INTERLOCK
:
The
External
Interlock
connections
are
provided
on
the
rear
panel
interface
connecter,
pin
3
and
pin
4.
They
are
intended
for
use
in
the
connection
to
a
customer
provided
and
implemented
external
safety
switch.
The
unit
will
not
operate
unless
the
external
interlock
circuit
is
closed.
If
the
interlock
is
not
being
used
(use
is
highly
recommended),
a
jumper
must
be
installed.
During
operation,
opening
the
external
interlock
will
cause
the
unit
to
revert
to
the
BEAM
OFF
mode.
Subsequent
closing
of
the
interlock
circuit
will
NOT
return
the
unit
to
BEAM
ON
mode;
this
must
be
accomplished
by
depressing
the
BEAM
ON
switch
(be
it
local
or
remote).
See
Figure
6.7
for
more
details.
REMOTE
BEAM
ON/OFF
INDICATORS
:
Allows
for
the
remote
monitoring
of
BEAM
ON/OFF.
See
Figure
6.8
Figure
6.3
Remote
Programming
via
Voltage
Sources