3.14
Install additional safety equipment (optional)
WARNING
If your Process Tool/control system needs to know the total flow rate of nitrogen to
the iL system for safety reasons, install suitable measurement equipment in
the nitrogen supply pipeline.
On a sensor-configured iL system, if you need to know the total flow rate of nitrogen to the LCDP
pump for safety reasons, you should fit suitable measurement equipment in the nitrogen supply
pipeline. If you fit a rotameter, ensure that it is suitable for use with nitrogen and that it is
correctly calibrated.
If the nitrogen supply to the iL system fails, a warning message will be shown on the Pump
Display Module (if fitted) and will be sent to the Interface Module(s) connected to the iL system.
Ensure that your installation is configured so that it remains safe if there is a failure of the
nitrogen supply to the iL system.
If an alarm condition is detected (and the iL system is not configured to 'run til crash': see
Section 5.9) the iL system will shut down automatically. You must ensure that your installation
remains safe if the iL system shuts down automatically.
3.15
Connect to your emergency stop circuit (optional)
Note:
If you do not connect to your own control equipment, you must fit the iL Tool Interface Module
plug supplied to the iL Tool Interface Module connector on the rear of the iL system (Figure 1-4,
item 8). If you do not, you will not be able to operate the iL system.
If required, you can connect your own control equipment to the iL system to shut down the iL
system in an emergency. Use the following procedure
1.
Remove the link between pins 1 and 2 of the iL Tool Interface Module plug supplied.
2.
Connect a suitable cable to the plug; Table 3-3 shows the use of the pins in the plug.
3.
Refer to Figure 1-4. Fit the plug to the iL Tool Interface Module connector (8) on the rear of
the iL system.
Pin(s
)
Use
1 and 2
Linked as supplied. Remove the link and connect these pins to your
normally-closed, isolated external emergency stop circuit.
3 and 4
Isolated auxiliary contacts of the emergency stop switch on the Electrics
and Pump Control Module.
5
24 V a.c. continuous output; maximum current 625 mA
6
0 V return
Table 3-3 - Pins in the iL Tool Interface Module plug
3-16
iL Dry Pumping Systems
