889-2106-03
Model U-1400 Operations Manual Rev Apr 2020 Page
7
of 39
Section 3
Specifications
3.1
PHYSICAL
W
EIGHT
: 2.73 lb (43.6 oz) (1236 gm).
S
IZE
: 7.65 inches (19.43 cm) high x 3.90 inches (9.91 cm) wide x 7.13 inches (18.11 cm) deep including
connectors.
O
PERATING
T
EMPERATURE
: -40
°
F to +180
°
F (-40
°
C to +82
°
C).
C
IRCUIT
B
OARD
: Printed circuit boards are 0.062 inch thick FR4 material with 2 oz. copper on both sides and
plated through holes.
C
ONNECTORS
:
P
RIMARY
I
NTERFACE
C
ONNECTOR
: MS type, 55 Pin, Circular, Male, 71-570128-55M.
AUX
PORT
C
ONNECTOR
: DB-15, 15 pin, right angle, PC Board mount, metal shell, D subminiature receptacle
with gold plated female contacts and latching blocks.
COMM
PORT
C
ONNECTOR
: DB-9, nine pin, right angle, PC Board mount, metal shell, D subminiature
receptacle with gold plated female contacts and nuts for retaining screws.
3.2
ELECTRICAL
P
OWER
: 9.5 to 18 VDC, 3.0 Amps maximum.
F
USE
: 3 amp, 3AG type (Slo-Blow) type located in a fuse holder mounted on the front panel.
P
OWER
D
OWN
: When the DC voltage drops below the low power detection threshold (7.8 VDC), the detector will
save all needed information to hold calls through the power down sequence. Upon power restoration (a minimum
of 9.0 VDC), the detector will use this saved data to determine the correct occupancy state of all loops.
L
OOP
F
EEDER
L
ENGTH
: Up to 1500 feet (450 m) maximum with proper feeder cable and appropriate loops.
L
OOP
I
NDUCTANCE
R
ANGE
: 20 to 2500 microHenries with a Q factor of 5 or greater.
L
OOP
I
NPUTS
: Transformer isolated. The minimum capacitance added by the detector is 0.068 microFarad.
L
IGHTNING
P
ROTECTION
: The detector can tolerate, without damage, a 10 microFarad capacitor charged to 2,000
volts being discharged directly into the loop input terminals, or a 10 microFarad capacitor charged to 2,000 volts
being discharged between either loop terminal and earth ground.
R
ESET
: Application of a 30 millisecond low state (relative to +12 VDC) to Pin Z of the primary interface
connector resets all loops. Each loop input channel can be manually reset by selecting the loop input channel then
pressing and holding the front panel
CHAN
pushbutton for three seconds, or by changing the sensitivity or loop
frequency of the loop input channel.
S
YNCHRONIZE
S
CAN
C
ONTROL
:
The
SYNCH IN
input and
SYNCH OUT
output allow the loops from different
detectors to be scanned sequentially, either in series or parallel. This feature can be used to eliminate crosstalk
between adjacent loops connected to different U-1400 detectors. NOTE: Response times will vary depending on
the number of detectors (up to a maximum of four) on the Synch Line. (See Section 3.4.)
V
ITAL
O
UTPUTS
:
The Primary and Auxiliary Vital Outputs are transformer isolated and are capable of sourcing 200
mA at 12 VDC. Opto-isolated circuitry verifies that the Vital Output is in the desired state. If either Vital Output
fails its self-check, both of the detector’s Vital Outputs will be deactivated.
V
ITAL
I
NPUTS
:
12 volt inputs isolated from the detector. Opto-isolated circuitry verifies that the Vital Inputs are
operational.
C
HECK
L
OOP
R
ELAYS
:
Contacts rated for 6.0 Amps maximum, 150 VDC, 300 VAC, and 500 VA maximum
switched power.
3.3
OPERATIONAL
L
OOP
S
TATUS
I
NDICATORS
: Each loop input has a super high intensity red light emitting diode (LED) to indicate a
Call (vehicle detected over loop) or failed loop.
