Vaisala TCI101 NiteStar - Manual (Page 12)

TTL PDI WIRING
The device is connected to the RED wire; a 47K
Ω
resistor is
necessary to supply the ground level to the device.
12 V PDI CONNECTION
See P/N 1050 Manual.
SETTING PDI DISTANCE
(i.e. feet/miles/kilos between pulses)
STEP 1 : Set the measurement units, (feet,miles or KM), you wish
to use for your PDI distance. Even though the default “1”
appears, you must re-enter the required PDI Distance number and
press MARK/ENTR.
STEP 2 : Next, press the following keys: 8PDI key, 2UNIT key
(DISTANCE), MARK/ENTR key.
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MOUNT TERMINAL
BLOCK TO FENDER
WELL USING #6-32
METAL TAP SCREWS
TELEPHONE-TYPE FLAT CABLE
(BLACK, 8 FT.)
TO THE NITESTAR DMI
POWER CABLE
WIRE DIRECTLY TO
12 VOLT VEHICLE
BATTERY (CONNECT LAST)
NITESTAR FUNCTIONS
PIN 1
PIN 2
PIN 3
PIN 4 = BLACK
= RED
= GREEN
= YELLOW = GROUND
= PDI (5V SIGNAL)
= SIGNAL IN
= +12v DC
250 volt
1 amp fuse
G
R
E
E
N
B
L
A
C
K
W
H
IT
E
R
E
D
B
L
A
C
K
Y
E
L
L
O
W
R
E
D
P
D
I
S
IG
N
A
L
I
S
R
E
D
+ RED
- BLACK
ELECTRONIC
INTERFACE SENSOR
or the
TRANSMISSION
INTERFACE SENSOR
SENSOR
TO TTL
DEVICE
(Jump to -Black to Battery)
B L A C K
W
H
IT E
B L A C K
R E D R E D
CABLE FRONT VIEW
1 2 3 4
TTL PDI
WIRING
DIAGRAM
SETTING PDI DURATION
(TIME = milliseconds the pulse is ON)
STEP 1 : Press the following keys: 8PDI key, 3PD key (number
of milliseconds), MARK/ENTR key. 1000 mill-secs = 1 sec.
STEP 2 : Remember, depending on your PDI distance, if your pul
es are too long they can run together at high speeds. If you use
pulses of less than 10 milliseconds duration then this should not
happen at normal highway speeds. If you need longer pulses use
the following formula to find what your absolute maximum speed
will be.
SPEED = (PDI Length) * 1000/ (PDI Time in milliseconds)
This speed will be in Length/second units and use your standard
conversion factors to change to KPH or MPH
For feet/second -> MPH multiply by 0.6818
For kilometers/sec -> KPH multiply by 3600
SETTING PDI DURATION (DISTANCE) (i.e. feet/miles/kilos pulse is ON)
STEP 1 : Press the following keys:
8PDI key, 3PD key, DISP/HOLD key, (DISTANCE) MARK/ENTR key.
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