889-2106-03
Model U-1400 Operations Manual Rev Apr 2020 Page
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of 39
2.10
DETECTOR ID
This feature is used in conjunction with the Synch feature (Option 7) and is also used as a means of providing each
detector with a unique identification signature for communication purposes. Detector ID settings can range from
000 to 255. If, however, the detector is set to an ID value of 255, it is considered to be in an uninitialized state and
the detector will not save any power down data. When a detector with an ID setting of 255 is powered up, the
LCD will alternate between
id
and
255
until the ID setting is changed to something other than 255 and the new
setting is saved in detector memory. When any detector is first initialized, its ID setting is, by default,
255
.
2.11
OPTION 7: SYNCH FEATURE
This option provides a means of linking together up to four (4) U-1400 detectors. Each detector’s Option 7 has
three settings ranging from 7.00 to 7.02. There are two modes of Synch, Series Synch and Parallel Synch. When
set to operate in Series Synch mode, one detector channel in the entire detector system is active at any given time.
This has the advantage of minimizing crosstalk between adjacent loops connected to different U-1400 detectors.
When set to operate in Parallel Synch mode, all detectors scan their respective channel 1, 2, 3, or 4 inputs at the
same time. Parallel Synch offers a faster response time than Series Synch, however the potential for crosstalk is
greater.
7.00 = Off.
7.01 = Series Synch.
7.02 = Parallel Synch.
NOTE: When operating in either Series or Parallel Synch mode, all linked detectors must have Option 7 set to the
same setting.
2.12
OPTION 8: INDUCTIVE ISLAND CIRCUIT FEATURE
The detector’s Inductive Island Circuit option can be toggled
ON
or
OFF
by momentarily pressing either the
(UP) or
(DOWN) pushbutton. Option 8 is a detector wide option. Turning this option
ON
for one loop input
automatically turns it
ON
for the other loop inputs. NOTE: Option 8 is mutually exclusive with Option 9. Only
one option can be enabled at a given time. If an attempt is made to turn one option
ON
while the other is enabled,
a warning buzzer will sound to provide an alert that the other mutually exclusive option is
ON
.
For proper operation, the arming loops must be connected to input channels 1 and 3 and the main channel loops
must be connected to input channels 2 and 4.
The sequence of operation starts with a detection on one of the two arming loops. Once this presence detection has
occurred, the remaining two or three input channels arm and Auxiliary Vital Output 1 deactivates. As the vehicle
proceeds from the first arming loop onto the main channel loop(s) and onto the other arming loop, presence
detection continues and deactivation of Auxiliary Vital Output 1 is maintained. Once the vehicle has cleared the
second arming loop, presence detection ends and Auxiliary Vital Output 1 reactivates.
This feature is used in applications where it is necessary to monitor the presence of vehicles within at-grade
crossings. The expected installation is two 20-foot arming loops located on either side of the crossing, and one or
two main channel loops spanning the crossing. Contact a Technical Support representative at Reno A&E regarding
proper loop configurations and spacing for specific applications.
Basic Installation - Single Main Channel Loop
Channel 1 and Channel 3 Loops are Arming Loops
Channel 2 Loop is Main Channel Loop
Channel 1 Loop
Channel 3 Loop
Channel 2 Loop
