Elkhart Brass Cobra 7250 EXM Monitor - Manual (Page 24)

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E. Extended Travel
The Cobra EXM’s maximum vertical travel is now dependent (as of firmware 2.0.56) on the state of an
additional input to position 3 of the 6-pin monitor power connector. This input allows the attachment of
an OEM provided proximity sensor to trigger an open or grounded state of operation. The discharge
vertical rotation limits from the horizontal center line (discharge parallel to the ground) for the proximity
sensor input state are shown in the table below.
Proximity Switch Input Vertical Max (Degrees) Vertical Min (Degrees)
Ground +120° -45°
Open Circuit +90° -45°
The extended travel function will only work if the monitor is properly
vertically calibrated (see Installation Step 3) and if the highest vertical
travel limit is properly set (see Operation Instructions D).
 The vertical Calibration Point will become the highest point of
operation when the proximity switch is in Open Circuit
(extended travel disabled). This is factory set to straight up;
+90°. The horizontal calibration is unchanged when using
extended travel.
 The highest Vertical Travel Limit should be set to the highest
point of operation desired when the proximity switch is
Grounded (extended travel enabled). This can be up to 30°
beyond the vertical Calibration Point. The lowest Vertical Travel
Limit cannot be set within the extended travel region.
If the proximity sensor changes the state to disable the extended travel
area (Open Circuit) while the discharge is in the extended travel
region, the monitor controller will automatically lower the discharge to
the Calibration Point.
Important:
If using a Position Feedback Display with an extended travel monitor, the
position display will need to be calibrated after setting new limits.
F. Keep-Out Zones
Keep-Out Zones are used when it is desired to restrict the motion of the monitor to a smaller more
specific range than that set during system calibration. Keep-Out Zones are different from travel limits
in that they do not restrict motion completely in any one direction. Keep-Out Zones can be set to allow
the monitor to move above a certain zone or beside the zone to either the left or right.
 Lower-Right Keep-Out Zone - The Right Keep-Out Zone will prevent the monitor from moving
down and to the right into a specified zone (reference figure 1)
o Put the EXM system into Setup Mode (reference Part B of the Operating Instructions section).
o Move the monitor to the upper left corner of the keep out zone.
o The Keep-Out Zone should be set within the previously set monitor calibration points. If a
Keep-Out Zone is set outside the intended operating area, operation of the monitor may be
unpredictable.