Durant Model 47000-400/401
Manual 47000-900-02
Typical input devices:
49400-400 Vane Pickup
49970-400 Proximity Sensor
ES-9513-RS Contactor
39700-XXX Shaft Encoder
48063-XXX Shaft Encoder
39200-400 Mini Photo Sensor
49160-401 Retro Reflective Photocell
Hall Effect Switches and Chips
6.
Signal Input
The number displayed is the number of cycles of input
signal each second, or two times the number of cycles
of input signal each second if the DOUBLER (Switch
2) in ON. The DOUBLER is most practical when the
waveform of the input signal is ON. The DOUBLER
produces a count on the negative edge and a second
count on the positive edge of the input signal. If these
edges are close together (from a pulse) with a larger
time to the next edge, the display may show a two
count variation when the actual input rate is constant.
The count rate (CPS) is equal to the number displayed
— the signal rate may equal 1/2 the number displayed.
Since the sample time of one second is equal to 1/60
of a minute, on installations indicating events per
minute, you must have an input device generating 60
counts per event.
Pulse/Item Calculation
To Measure: Double Switch OFF Double Switch ON
Items/Second
1 pulse/item
.5 pulses/item
Items/Minute
60 pulses/item
30 pulses/item
Items/Hour
3600 pulses/item
1800 pulses/item
Items can be: Revolutions, Feet, Inches, Yards, Gallons,
etc.
TROUBLESHOOTING
1.
No Display
If the display does not light and show 0000 when the
AC power is applied, check the wiring to the “AC
INPUT” terminals and check to insure that the correct
power is getting to the unit.
2.
No Count from IN 1 and IN 2
Disconnect all power to the unit and remove all
connections to IN 1, IN 2, and IN 3. Place all the rear
panel switches in the ON position. Jumper IN 1 and IN
2 to the two AC INPUT terminals. Reapply AC power
and within eight seconds the display should show 12.0
if on 60 Hz power or 10.0 if on 50 Hz power. If this is
satisfactory, check your signal for IN 1 — IN 2.
3.
No Count from IN 1
Disconnect all power to the unit and remove all
connections to IN 1, IN 2 and IN 3. Place all rear panel
switches in the ON position. Re-apply AC power and
with a short piece of wire make momentary
connections from IN 1 to LOGIC = 15 VDC. The
display should show 00.2 for each make and break of
the connections in a one second Sample Time. If this
is satisfactory, check your signal for IN 1.
4.
No Count from IN 3
Disconnect all power to the unit and remove all
connections to IN 1, IN 2 and IN 3. Place all rear panel
switches in the ON positions. Re-apply AC power and
with a short piece of wire make momentary
connections from IN 3 to LOGIC COM. The display
should show at least 00.2 for each make and break of
the connection in a one second Sample Time. If this is
satisfactory, check your signal at IN 3.
