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A419-00-880 Issue K
The
EPX
pump is fitted with a Tool Interface Module (TIM), which allows
'plug and
play'
connection with all major
process tools. This communication includes control and monitoring of the
EPX
by the tool for
example
Run,
Stop,
Alarm.
A number of different tool interface options (TIMs) can be specified when the pump is first ordered: SPI, C3,
TEL,
E73,
MCM or HIT.
Note:
The LE and NE versions of the
EPX
pump can be operated via the end user controller and so do not require
a TIM for
operation.
The illustrations throughout this manual show the E73 variant of the TIM.
1.
3
Pump protection
sensors
WARNING
For EPX
N-series
pumps,
if the
pump has
been fitted with
a
C3 or
E73
tool interface, there
is
no
provision
for warnings, generated
by the
pump,
to
be
passed
onto the
tool.
The
installer
must fit
suitable monitoring
equipment to check
the
nitrogen purge
flow,
as detailed
in
Section
3.
WARNING
For EPX N-series pumps,
the
nitrogen purge
flow switch
in
the Gas
Module
is set to
12
slm.
The
flow
switch
provides an
indication
that a
flow
in excess
of
12
slm
is
present,
but
gives no guarantee
that there
is sufficient
flow to
meet the
process
requirements.
The flow
switch is not a guaranteed
safety interlock.
WARNING
When
the pump protection
sensor
operates,
only
the electrical supply
of
the pump motor is
switched off; the
EPX is not
isolated from
the electrical
supply.
A thermal snap-switch located within the
pump,
monitors the temperature of the body of the
EPX
pump. When the
temperature of the body
exceeds
a preset limit, the snap-switch
operates,
generating an alarm and causing the pump
to stop.
When the
EPX
pump is automatically shut down by a pump protection sensor, the Alarm LED is lit
(Figure 4
,
item
5).
On the
EPX
N series of pumps, a nitrogen purge flow switch is fitted to the Gas Module
to
monitor the total purge
flow to the pump. If the purge flow drops below 12 slm, the
warning
LED on the front panel
(or
EUC
if fitted)
,
will
light
(Figure
4,
item
4).
The pump
will
continue to run.
1.4
LED
status indicators
Refer to
Table 1
and
Figure
4.
Page4
©
Edwards Limited
2017.
All rights reserved.
Edwards and the Edwards logo are t rademarks of Edwards
Limited.
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