f/I Pulse converter 6420

f/I Pulse converter 6420
Nokeval
No 050302
f/I Pulse converter
6420
1
Contents
Description .................................................................................................. 3
6420 Pulse converter .............................................................................................. 3
Technical specification ................................................................................ 4
Dimensions ................................................................................................. 4
Terminal connections .................................................................................. 5
MekuWin software ....................................................................................... 6
Preparing ..................................................................................................... 6
Configuration ............................................................................................... 7
Conf-Menu .............................................................................................................. 7
Mode ....................................................................................................................... 7
Pickup ..................................................................................................................... 7
Prescaler ............................................................................................................. 7
Debounce ............................................................................................................. 7
LoPass
............................................................................................................. 7
OUT
............................................................................................................. 7
DIV
............................................................................................................. 8
Count mode ........................................................................................................... 8
Jumper settings ...................................................................................................... 8
Hand-Held programmer 6790 ..................................................................... 9
2
6420 Pulse converter
Power supply
for sensor
15 V
+15V
Power supply
+24 VDC
Monitor
Counter
Filter
Linearization
mA/V
Input sensor:
Output
0-20 mA, 4-20 mA
0-5V or 0-10V
f
NPN
PNP
Namur
Contact
N
Alarm
Pickup
PNP
Pulse divider
NPN
Alarm or
pulse output
NPN or PNPtransistor
(max. 100 mA)
Description
Programming by MekuWin software
or hand-held programmer 6790
Pulse converter 6420 is especially suitable for pulse
output flow sensors that can give less than one pulse
per second. The interval between pulses can be as
long as 4000 seconds. The frequency reading is
converted to a mA or V signal for other instruments.
Additionally, 6420 has one adjustable alarm output
or alternatively a pulse divider output for e.g.
electromechanical counter. This output can be
selected between NPN and PNP type.
RS-232
kaapeli
The converter is processor based and can be
configurated by general purpose configuration
program MekuWin or alternatively by a hand-held
programmer 6790.
It is possible to use 6420 as a pulse counter that
increases the output signal for every pulse. This
operation can be scaled freely. In this mode, the alarm
output can be utilised as a batch controller.
3
Technical specification:
Alarm
Alarm output
Sensors:
External relay
Hysteresis
NPN, PNP, Namur, contact,
push-pull or magnetic pickup
NPN/Concact/Namur:
Input current range <1..>2.7 mA
Open input voltage 9.7 V
Input resistance 1.2 kΩ
Shortage input current 8 mA
PNP:
Input resistance 5 kΩ
Trigger level 2.5V (common)
Pickup:
Signal level 20..500 mV
input resistance >1 MΩ
Input ferquency:
Min. Frequency
4000 seconds/pulse (0.00025 Hz)
Max. Frequency
5 kHz (20 kHz with prescaler)
Min pulse width
100 µs
Filter
Digital filter freely selectable
Filter for contact input debounce
Sensor supply:
15 V, max 50 mA
24 VDC power supply can also be
used for sensor supply
Counter function:
Output:
Current output
Max. load
Load effects
Voltage output
Max. load
Linearization
Programming
Accuracy
Resolution
Pulse output:
Divider
Pulse output:
Pulse width
Power supply:
Operating temp.
Weight
Mounting
1 alarm level selectable
PNP or NPN- transistor,
max 28V, 100mA
use NPN output
freely selectable
(Alternative to the alarm)
Freely selectable (floating
point values).
PNP or NPN transistor,
max 28V, 100 mA
50, 75, 100, 200, 500 or
1000 ms
19..28 VDC, supply current
20..60 mA
0..60°C
100 g
DIN rail 46277
How to order:
6420 - A - B - C
Scaleable counter 4 000 000 000
increases output. Reset by external
contact
A: Input range (Hz)
B: Output type
C: Alarm / Divider
Alarm=AL(low level)/value, AH(high level)/value,
Divider= D/value
0..20 mA , 4..20 mA
650 Ω
<0.01%
0..5 V, 0..10 V
1000 Ω
9 points
Freely scaleable on full range
<0.1% of span
12 bits
For example: 6420-0/150Hz-4/20 mA-AH/100Hz
Input range 0..150 Hz, output 4-20 mA,
High alarm level 100 Hz.
6420 can be delivered according to ordered settings, if
programmers are not available.
Dimensions:
22,5
82
99
4
Terminal connections:
NPN-sensor
Closing contact
6420
+ 15 VDC (max 100 mA)
2
6420
NPN-sensor
+
Input
4
0V
5
+
+
NPN 4
Pulse
5..24V
-
5
0V
Closing
contact
Pickup-sensor
PNP-sensor
6420
Pickup
mV-sensor
6420
PNP-sensor
+ 15 VDC (max 100 mA)
2
+
Pick-up 3
Pulse
5..24V
PNP 1
0V
5
Pickup sensor: 20-500 mV
sine-wave signal
5
0V
Pickup-sensor requires jumpper
or program settings
Namur-sensor
Output
6420
6420
Namursensor
0V
+
8
-
+
4
Namur
7
0/4..20 mA
5
0..5/10 V
+
10
Namur-sensor
2-wire sensor
0= <1mA, 1=>3mA
Alarm or pulse output
NPN terminals (+)11/(-)8
PNP terminals (-)11/(+)9
Jumper selection
11
Alarm relay (NPN)
Push-Pull sensor
6420
6420
+24 VDC
9
11
max. 100 mA
(-)
12
Push-Pull
+ 15 VDC (max 100 mA)
2
Alarm- or pulse
divider output, NPN
or PNP-transistor
(max 28 V)
Pulse sensor
<2V.....>3V
(PNP) 1
5
0V
External relay only
NPN-output
Power supply
counter reset
1
2
3
4
5
6
7
8
9
Sensor ground wire (5) is connected to converter power supply (-)
terminal (12).
6420
6
Sensor supply voltage can be taken
fron converter power supply voltage
terminals (9/12).
5
Counter reset can be
used only when counter
mode has been selected
+
Power supply
- 24 VDC
10
5
11
12
MekuWin software
is loaded from the converter being configured. In this
way, there is no need to update MekuWin every time
there is a new converter or a new feature is added to
an existing product.
MekuWin is a general purpose configuration software
for Nokeval converters/transmitters supporting Meku
configuration language. It differs from conventional
configuration programs so that the menu structure (it
is, the things there are to configure) is not fixed, but
Preparing:
Use cable POL-RS232 to connect the pulse converter
to a PC serial port. Don't forget to provide supply
voltage 24V for the converter.
Launch MekuWin. When launching for first time, the
Comm setup window is shown. Select your serial port,
and set baud rate (BPS) to 9600. Let the other settings
be 0. Click OK.
In MekuWin window, there is a handy Quick menu
with four buttons. If it is not visible, select Window/
Quick at the pulldown menu.
The first button opens the previously explained Comm
setup window. But now, use the second button (Conf)
to establish a connection to the converter. If it fails,
check the Comm setup again, and that you have the
supply voltage connected.
MekuWin-software commsetup selection
6
LoPass
Configuration
Use this filter to damp the frequency reading in case
there are disturbances. Set the time constant in
seconds (0=no damping). In one time constant, the
output signal will reach 63% of its final change when
a sudden change in input frequency has occured.
Conf menu
The configuration menu is divided to several menus
to clarify it. When you use the Conf button in the quick
menu, you see the configuration main menu. It is used
to set parameters associated with the input (frequency
or count). Additionally there is separate sub-menus
for output signal, its linearisation, and divider/alarm
output. These are explained later. The menu hierarchy
is best illustrated on page 9.
LoPass filter setting principle
100 %
63 %
6420 Pulse converter Conf
menu window by
MekuWin software.
0%
LoPass / s
OUT
Range: Select the output signal range
(0..20mA, 4..20mA, 0..5V or 0..10V).
Lo:
signal
Mode
Hi:
6420 can alternatively measure the input signal
frequency or count the number of pulses input. For
the latter option, see Count mode on page 8.
The input frequency (in Hz) that
corresponds to minimum output
(e.g. 4mA).
The input frequency that corresponds to
maximum output signal (20mA)
Lin:
The output signal has not to be linear in
respect to the input frequency. You
can
use Lin menu to adjust the
output signal
in nine points (10,20..90%).
The extremes
(0% and 100%) are set
using Lo and Hi in
the Out menu. Use
the Use option to enable
the linearisation.
Pickup
Several types of sensors can be connected to this
converter. The only thing that has to be configured is
whether the sensor is a magnetic pickup or not. For
NPN, PNP, Namur, and contact sensors, set this
option off.
The factory setting is off. However, it is possible to
use pickup sensor without a configuration device.
Short jumper J3-A to override this setting if you have
pickup sensor.
Output signal selection
and scaling, and output
signal linearization by
MekuWin software.
Prescaler
When the prescaler is disabled, the maximum input
frequency is 5 kHz. If you need to measure higher
frequency (up to 20 kHz), enable the prescaler and
the converter will count every fourth input pulse. This
does not affect the output scaling as the converter
will automatically compensate the prescaling.
Debounce
If your sensor is of mechanical contact type, use this
option to engage a debounce circuitry in the converter
that will reject pulses exceeding abt 30 Hz. It is also
recommended to use debounce with other sensors
when operating on frequencies below 10 Hz to get
extra protection against disturbances.
7
Count mode
DIV
This sub-menu is used to control the
divider/alarm output.
Mode:
Select the desired mode of operation:
The converter can be used as a simple batch
controller using the count mode and the alarm output.
The output scaling (Lo and Hi in the Out menu) is
done for the pulse count, e.g. Lo=0 and Hi=100 000
pulses, and the same applies for the alarm level (Div
menu). The counter can count 4 billion counts
maximum. Use an external contact to reset the count.
Off = divider output not used
Divider = divider mode
Al Lo = low alarm mode
Al Hi = high alarm mode
Div:
The amount of input pulses after which
the output will give a pulse. The divider
has not to be an integer. If you use divider
value 3.5, the output will give a pulse
alternately between 3 and 4 input pulses.
mA
Alarm output reset
counter
16 mA
Pwidth: The divider output pulse width. Options
are 50, 75, 100, 200, 500, and 1000 ms.
Level:
Alarm level. When the input frequency
or count exceeds (high alarm) the level
set, the alarm output will activate.
4 mA
Batch count
When the alarm has activated, the input
frequency must decline below the
alarm
level by the Hyst value to be
deactivated.
Pulse count
Reset
Hyst:
Jumper settings
The divider/alarm output can be either NPN or PNP
type. Use jumper J4 to select. Factory setting NPN.
When driving a relay or electromechanical counter,
use NPN output since it is protected with a freewheel
diode.
Pulse output and alarm
settings by MekuWin
software.
If using a pickup sensor and you don't have a
configuration device available, you can enable the
pickup input by shorting jumper J3-A. After this, the
software Pickup selection is overridden.
Jumper settings
J3
J4
Pickup selection Pulse output type
D C B A
J4
NPN-transistor
J4
PNP-transistor
J3
8
Hand-Held Programmer
6790
Power 6790 up by pressing ➤ key. If necessary, select
Baud=9600 or Auto. Select Conn and push ➤ to connect.
If it succeeds, the 6790 starts to indicate the current input
frequency of the converter, this is called monitoring.
Nokeval 6790 hand-held programmer is the alternative way
to configure the converter. As being battery-powered, it is
especially handy in the field. You see the same menu
structure as with MekuWin software. Like MekuWin, 6790
can be used for every Nokeval converter/transmitter
supporting Meku language.
To configure the converter, press Conf key for one second.
The first configurable item (Mode) will appear in the display.
Select the item you want to set, push ➤ to start editing,
edit with ▲ ▼ ➤ and exit with ★. Configure all items, and
finally push ★ to exit to Save/Undo stage. Push ➤ to save
the changes and return to monitor stage.
PREPARING
Before disconnecting the cable, please close the
connection by pressing ★ for one second (Conn displayed,
ready for a new connection). Power off by pressing ★ again.
Supply 24V to the converter. Connect 6790 programming
cable to the converter Prog connector.
Conf-menu
Mode
Conf-menun asetuskset:
Freq
Count
Pickup
Mode:
operating mode (Freq / count )
Pickup: if pickup sensor used (yes / no)
Prescaler
Debounce
Prescaler:
prescaler selection (yes / no)
Debounce:
eliminate debounce (yes / no)
LoPass: lopass filter damps the reading (tc in seconds)
LoPass
Out:
output selection
Range: output type 0/4..20mA or 0..5/10 V
Out
Range
Lo
0..20 mA
4..20 mA
0..5 V
0..10 V
Lo: minimun frequency
Hi: maximum frequency
Lin: output signal linearisation selection
Use: linearisation used (yes / no).
10%..90 %: linearisation selection in
9 point
Hi
Lin
Use
10 %
.
.
.
90 %
Div:
Pulse divider or alarm settings
Mode: select to use sought-after function
Off: not used
Divider: divider mode
Div
Mode
Div
Al Lo: low alarm mode
Off
Divider
Al Lo
Al Hi: high alarm mode
Div: divider value setting
Al Hi
Pwidth: divider output pulse width:
50, 75, 100, 200, 500 or 1000 ms
Pwidth
Level: alarm level
Hyst: alarm hysteresis
Level
Hyst
9
Notes:
10
Notes:
11
Nokeval
Nokeval Oy
4800
Yrittajakatu 12 Fax.
37100 NOKIA email
FINLAND
www.nokeval.com
Tel.
+358 3 342
+358 3 342 2066
sales@nokeval.com
http://
12
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