D396-14-880 Issue J
Page 30
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Installation
3.10
Connect the logic interface to your equipment
CAUTION
Do not earth (ground) the logic interface 0 V line (pins 2 and 4). If you do, you will provide an earth (ground)
return path for any electrical fault in the pump-motor and this could damage the Controller or your control
equipment.
CAUTION
Do not connect voltages greater than 45 V to the logic interface. If you do, the Controller will not comply with
the low voltage safety recommendations of IEC 1010.
Note:
If your backing pump will take more than 30 minutes to reduce the pressure in the vacuum chamber to
1 mbar, we recommend that you use the TMP Interlock to delay the EXT pump Start until this pressure is
reached.
The Controller is supplied with a mating-plug for the logic interface connector. As supplied, this mating-plug has
three links fitted to close the TMP Interlock and SYS Interlock and to close the Start/Stop input. If you want to use
the Controller for stand-alone operation, you must fit this mating-plug to the logic interface connector on the rear
of the Controller (see Figures
to
).
Use the appropriate pins on the mating-plug to connect your control equipment and accessories to the Controller, as
described in the previous sections and as shown in
and Figures
and
. Note that, depending on how you
want to use the Controller, you may have to remove the factory fitted links from the mating-plug.
3.11
Adjust the Normal speed setpoint
Note:
If you set the Normal speed setpoint to be more than 70% of full rotational speed, the TMP Normal relay
will open when you select Standby. The Controller is supplied with the Normal speed setpoint adjusted to
80% of full rotational speed.
You can adjust the Normal speed setpoint (at which the TMP Normal relay will close: see
) between 65
and 95% of full rotational speed.
To adjust the Normal speed setpoint, use a small screwdriver to turn the SET POINT potentiometer; an access hole
is provided on the top cover of the Controller.
detail A shows the approximate Normal speed setpoint
settings for different potentiometer adjustments.
3.12
Adjust the Internal Timer
The Internal Timer can be adjusted between approximately 1 and 30 minutes. The Controller is supplied with the
Internal Timer adjusted to 8 minutes (see
).
To adjust the Internal Timer, use a small screwdriver to turn the TIMER potentiometer; an access hole is provided on
the top cover of the Controller (see
1. Turn the potentiometer fully anticlockwise; this position corresponds to the minimum time of approximately 1
minute.
2. Turn the potentiometer clockwise to set the required time; one full turn adds approximately two minutes to the
set time. For example, seven full turns give a set delay time of approximately 15 minutes.
Содержание EXC120
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