LINK Systems OmniLink 5000 - Manual (Page 22)

3-1
Figure 3.1
Probes used with Static,
Normally Open inputs
Section 3 Die Protection Input Types and Their Uses
Each of the sixteen die protection inputs can be programmed for any one of eleven different die
protection types: Static Normally Open, Static Normally Closed, Cyclic, Transfer, In Position, 1 Part
Detection (Edge Only or Pass Completely), 2 Part Detection (Edge Only or Pass Completely), Track
PLS, and Track PLS Invert. In addition, any input can be programmed as Unused if desired.
Section 3.1 Static N.O. and Static N.C.
Static inputs are used for sensors that
monitor events that are independent of the
production machine cycle. Examples are
sensors monitoring end of stock, stock
buckling, and misfeed. If the input is
programmed as Static Normally Open
(labeled as Static N.O.) then the input
should NOT be grounded under normal
operation. In this case, connection of the
input to ground will cause a stop to occur.
If the input is programmed as Static
Normally Closed (labeled Static N.C.) then
the input should be grounded under normal
operation. In this case, if the ground
connection to this input is opened (as by
switch or sensor breaking the connection)
then a stop will occur.
An example of the use of a normally open
input is stock buckling detection, as shown in Figure 3.1, part A. The stock to be fabricated is placed
between a dual probe in the normal position. The probe remains open (ungrounded) unless the stock
buckles upward or downward far enough to touch the upper or lower portion of the probe, closing
(grounding) the normally open input, causing a fault.
An example of the use of a normally closed input is an end of stock sensor, as shown in Figure 3.2.
A probe is mounted so that it is grounded by the stock being fed into the production machine. When
the end of stock is reached, the probe will no longer contact the stock, opening the input and causing
a fault.
An additional feature of Static type inputs is the delay timer which is programmable by the
operator.* A programmed time of zero forces ordinary operation of the static input as described