Vehicle Detector Installation
and Loop Layouts
HySecurity recommends that vehicle detectors be used for free exit and obstruction sensing logic only. The
exception is in parking or barrier arm applications where detectors may also be used to close the gate. In
applications employing our swing, vertical lift, or sliding gate operators, closing logic cannot be used except
when the anti-tailgate logic is employed.
Vehicle detector functions (OR, IR, HD, DL ) are configurable through the
Table 4: Installer Menu on page 25
.
NOTE:
For in-depth information regarding Hy5B vehicle detectors, click
Tech Support on the HySecurity website
and follow the link
to
Installation Manuals
.
Anti-TailGate Mode (Closing Logic)
The Detector Logic (DL) installer menu item lets you set the anti-tailgate mode. This menu item works in
conjunction with the Close Timer (CT) when the vehicle detector is triggered. If you plan to use the anti-
tailgate feature, check the time delay aspect of the Close Timer (CL) setting.
The four selectable modes for DL are as follows:
Mode 1 (Default):
An input from either the Free Exit, Outside Obstruction Loop (OOLD), Inside Obstruction
Loop (IOLD), or the Center Loop (CLD/RESET/Shadow) will hold the gate open, reset the close timer, and
ignore all close inputs. The close timer begins to count down only after all vehicle detectors are clear and no
other open command is present.
Mode 2:
The close timer does not wait for vehicle detectors to clear, but instead it starts counting down as
soon as the open limit is reached.
Mode 3:
When both inside and outside obstruction loops are simultaneously active, the gate will close
immediately (unless another open command is present) once all vehicle detectors are no longer sensing active
loops (i.e. vehicle loops are clear).
Mode 4:
Full anti-tailgate logic includes Mode 3 functions. In addition, the gate will stop during the opening
cycle when both OOLD & IOLD (reversing loops) are tripped simultaneously. When the OOLD & IOLD loops
are cleared, the gate closes immediately. The OOLD & IOLD can be individually set so that, if tripped while
closing, the gate may either, pause only or reverse to reopen. The free exit detector input is ignored while the
gate is closing.
NOTICE:
Using any vehicle detector logic mode other than Mode 1 (default) requires that all the loops be placed
with the geometry and spacing as shown in the loop layout drawings. The detector Modes 3 and 4 require use of
separate inner and outer obstruction detectors. Mode 4 is not available in HydraWedge SM50 or gate operators
functioning with HydraSupply XL.
TailGate Alert
User Relay 11 is available for notification devices. If a vehicle is tailgating, and a flasher or audio device is
connected to User Relay 11, the relay will be triggered by the tailgating vehicle crossing the loops. Refer to
User Relays - Programming Procedure on page 39
.
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Vehicle Detector Installation and Loop Layouts
MX3650-01 Rev. D
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