Loctite 1390321 - Theory of Operation; Additional Features: Signals

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2.2 Theory of Operation
The Loctite
®
Integrated Semi-Automatic Dispenser is connected to an external pneumatic
supply. It regulates the adjusted dispensing pressure and controls the dispensing during the
selected dispensing time.
An uncovered bottle of LOCTITE
®
product is placed directly into the integrated reservoir, the
tube is inserted into the product, and the reservoir lid is clamped in place.
It is then pressurized using clean, filtered dry air. Air within the reservoir will push down on
the liquid in the bottle and force it through the product feed line to the dispensing valve.
The amount of product dispensed is controlled by three main factors:
– Amount of pressure in the reservoir
– Length of time the dispensing valve remains open
– Dispensing needle size
Time Mode:
1. Press the footswitch to activate the system.
2. The dispensing timer will be activated and start to dispense with preset dispensing time.
3. After the dispensing timer has reached the preset dispensing time, the dispensing will be
stopped.
Manual Mode:
1. Press the footswitch to activate the system.
2. The system will start to dispense and the dispensing timer will start to count the
dispensing time.
3. Once the footswitch is released, the dispensing will be stopped.
Additional Features:
EMPTY Signal:
If the reservoir is empty the contact of the level sensor opens. Three different types of Empty
Signal can be selected to indicate.
Mode 1: Digital Only
Mode 2: Digital + Lamp
Mode 3 : Digital + System Stop
READY Signal :
If the dispensing cycle is finished and unit is not dispensing, a contact is closed and a
<READY> signal is communicated. The ready signal only indicates that the dispensing is either
on (busy) or off (ready). This signal is independent of any other system conditions.
Both EMPTY and READY signals are available as dry contacts at the XS1 start interface for
optional connection to an external PLC. Any external sources need to be programmed to suit
end user requirements.
In Mode 3, the ready signal will be communicated even though an Empty signal may be
communicated, however, the system will not dispense.