Product Overview - Allmatic A1H-U Manual De Instrucciones

PRODUCT OVERVIEW

The A1H-U rail mount, vehicle loop detector is compatible with most gate operators. The A1H-U may be
used in Center, Safety and Exit loop positions. The display feature makes set-up easy by displaying the
optimum sensitivity setting required to detect a vehicle positioned on the loop. Ten sensitivity settings allow
for fine adjustment of detection level.
The A1H-U provides relay contact outputs indicating vehicle presence. The A1H-U features automatic
sensitivity boost (ASB), delay, fail-safe/fail-secure and infinite or normal (5 min.) presence. Four frequency
settings provide flexibility in preventing crosstalk in multi-loop applications.
OPERATION
Power up
Upon power up the detector initializes by automatically tuning to the loop. The green LED indicates
that the detector is powered and operational.
Frequency setting
The operating frequency of the loop is a function of the specific loop inductance and DIP switch
settings 1 and 2. The primary purpose of the frequency setting is to allow the installer the ability to
set different operating frequencies for multi-loop installations, recommended to prevent
crosstalk/interference from adjacent loops.
Frequency Count switch to re-initialize the detector. To check the operating frequency of a loop refer
to the Frequency Count section.
occurring, refer to the Sensitivity Display section.
Sensitivity Display
The sensitivity display simplifies the installation process by displaying the sensitivity setting required
to detect a vehicle on the loop. To use this feature, observe the display while a vehicle is moving
into position on the loop, note the number displayed, then adjust the sensitivity setting (rotary switch)
to the displayed position.
During normal operation, when a vehicle is not on the loop, the display is blank. The effects of
crosstalk or other interference can be observed on the display when the loop is vacant. Interference
or crosstalk will cause the display to indicate a level, typically 8 or 9. It may be necessary to observe
the display for a minute or so to see this effect. Change the frequency setting to prevent crosstalk.
Sensitivity setting
The 10-position rotary switch allows for precise adjustment of detection level. The sensitivity level
increases from position 0 thru 9 with position 0 being the lowest sensitivity. Typical applications
require a setting of 3 or 4. The sensitivity display simplifies the installation process by displaying the
sensitivity setting required to detect a vehicle on the loop. To use this feature, observe the display
while a vehicle is moving into position on the loop, note the number displayed, then adjust the
sensitivity setting (rotary switch) to the displayed position.
A1H-U
6-1621238 rev.0 09/12/2013
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After changing the frequency setting, press the
To determine whether crosstalk between adjacent loops is
3