Omron K3NX User manual

9
Process Meter K3NX
Advanced Intelligent Signal
Processor Accepts Voltage/Current
Input
1Programmable through the front panel
or via RS-232C, RS-485, or RS-422
1Programming with easy setup and
calibration
1Multi-range function allows single
Process Meter to cover a wide range of
inputs
1Easy-to-use scaling function with the
key programming method
1Auxiliary power supply (80 mA at
12 VDC)
1NEMA4/IP66 front panel
1UL, CSA, and CE approved
Ordering Information
To order output and communication boards, refer to the separate K31 data sheet called
Output and Communication Boards
. See page 155.
3BASE UNITS
Model Supply
l
t
Applicable
t
t
b
d
Part number
y
voltage output boards Input type
DC voltage DC current AC voltage AC current
Basic model 100 to 240
VAC K31-C1/C2/C5
K31-T1/T2
K31-B2/B4
K31-L1/L2/L3/
L4/L5/L6/L7/
K3NX-VD1A K3NX-AD1A K3NX-VA1A K3NX-AA1A
Present value LED and front-panel control
keys. Can connect to any output board or,
without an output board, can be used for
display only.
12 to 24
VDC
L
4
/
L
5
/
L
6
/
L
7
/
L8/L9/L10
K31-FLK1/
FLK2/FLK3/
FLK4/FLK5/
FLK6
K3NX-VD2A K3NX-AD2A K3NX-VA2A K3NX-AA2A
Set value LED model 100 to 240
VAC K31-C1/C2/C5
K31-T1/T2
K31-B4
K31-L4/L5/L6/
L
9
/
L
1
0
K3NX-VD1C K3NX-AD1C K3NX-VA1C K3NX-AA1C
Present value LED, set value LED, and
front-panel control keys. Can connect to
relay contact, transistor, or combination
output boards.
12 to 24
VDC
L
9
/
L
1
0
K31-FLK4/
FLK5/FLK6 K3NX-VD2C K3NX-AD2C K3NX-VA2C K3NX-AA2C
Note: “Set Value LED” models must be used with an output board in order for them to operate.

K3NX K3NX
2
3MODEL NUMBER LEGEND
K3NX - 1 234
Base Units
1, 2. Input Sensors Codes
VD: DC voltage input
AD: DC current input
VA: AC voltage input
AA: AC current input
3. Supply Voltage
1: 100 to 240 VAC
2: 12 to 24 VDC
4. Display
A: Basic Model
C: Set Value LED Display
Specifications
3RATINGS
Supply voltage 100 to 240 VAC (50/60 Hz); 12 to 24 VDC
Operating voltage range 85% to 110% of supply voltage
Power consumption (See Note.) 15 VA max. (max. AC load with all indicators lit)
10 W max. (max. DC load with all indicators lit)
Sensor power supply 80 mA at 12 VDC±10% (Use a power supply of less than 50 VAC or 70 VDC for input signals.)
Insulation resistance 20 MΩmin. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Dielectric withstand voltage 2,000 VAC for 1 min between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Noise immunity ±1,500 V on power supply terminals in normal or common mode ±1µs, 100 ns for
square-wave noise with 1 ns
Vibration resistance Malfunction: 10 to 55 Hz, 0.5-mm for 10 min each in X, Y, and Z directions
Destruction: 10 to 55 Hz, 0.75-mm for 2 hrs each in X, Y, and Z directions
Shock resistance Malfunction: 98 m/s2(10G) for 3 times each in X, Y, and Z directions
Destruction: 294 m/s2(30G) for 3 times each in X, Y, and Z directions
Ambient
t
t
Operating --10 to 55°C (14 to 131°F) with no icing
temperature Storage --20 to 65°C(--4to149
°F) with no icing
Ambient humidity Operating 23% to 85% (with no condensation)
Ambient atmosphere Must be free of corrosive gas
EMC Emission Enclosure: EN55011 Group 1 class A
Emission AC Mains: EN55011 Group 1 class A
Immunity ESD: EN61000-4-2:4-kV contact discharge (level 2)
8-kV air discharge (level 3)
Immunity-RF-interference: ENV50140: 10 V/m (amplitude modulated, 80 MHz to
1GHz)(level3)
10 V/m (pulse modulated, 900 MHz)
Immunity Conducted Disturbance: ENV50141: 10 V (0.15 to 80 MHz) (level 3)
Immunity Burst: EN61000-4-4:2-kV power-line (level 3)
2-kV I/O signal-line (level 4)
Approved standards UL508, CSA22.2, CE; conforms to EN50081-2, EN50082-2, EN61010-1 (IEC1010-1);
conforms to VDE106/part 100 (Finger Protection) when the terminal cover is mounted.
Weight Approx. 400 g
Note: An Intelligent Signal Processor with DC supply voltage requires approximately 1 A DC as control power supply current the moment
the Intelligent Signal Processor is turned on. Do not forget to take this into consideration when using several Intelligent Signal Pro-
cessors. When the Intelligent Signal Processor is not in measuring operation (e.g., the Intelligent Signal Processor has been just
turned on or is operating for startup compensation time), the display will read “ööööö” and all outputs will be OFF.

K3NX K3NX
3
3CHARACTERISTICS
Input signal DC voltage/current, AC voltage/current
A/D conversion method Double integral method
Sampling period 50 Hz: 12.5 times/s; 60 Hz: 15 times/s (selectable)
Display refresh period Sampling period (sampling times multiplied by number of averaging times if simple average
processing is selected.)
Max. displayed digits 5 digits (--19999 to 99999)
Display 7-segment LED
Polarity display “--” is displayed automatically with a negative input signal.
Zero display Leading zeros are not displayed.
Scaling function Programmable with front-panel key inputs (range of display: --19999 to 99999). The decimal
point position can be set freely.
HOLD function Maximum hold (maximum data)
Minimum hold (minimum data)
External controls HOLD: Process value held
RESET: Maximum/Minimum data reset
ZERO: Forced zero
Comparative output hysteresis setting Programmable with front-panel key inputs (1 to 9999).
Other functions Variable linear output range (for models with linear outputs only)
Remote/Local processing (available for communications output models only)
Maximum/Minimum value data reset with front panel keys
Forced-zero set with front panel keys
Averaging processing function (simple or moving average)
Startup compensation time (0.0 to 99.9 s)
Comparative output pattern selection
Security
Field calibration
Output configuration Relay contact output (5 outputs)
Transistor output (NPN and PNP open collector), BCD (NPN open collector)
Parallel BCD (NPN open collector) + transistor output (NPN open collector)
Linear output (4 to 20 mA, 1 to 5 V) + transistor output (NPN open collector)
Communication functions (RS-232C, RS-485, RS-422)
Communication functions (RS-232C, RS-485, RS-422) + transistor output (NPN open
collector)
Delay in comparative outputs
(transistor output) DC input: 200 ms max. AC input: 400 ms max.
Enclosure ratings Front panel NEMA4 for indoor use (equivalent to IP66)
g
Rear case IEC standard IP20
Terminals IEC standard IP00
Memory protection Non-volatile memory (EEPROM) possible to rewrite 100,000 times

K3NX K3NX
4
3MEASURING RANGES
Input range Measuring range Input impedance Reliability (See Note 2.) Instantaneous overload
(30 seconds)
DC voltage æ±199.99 V 10 MΩ±0.1%rdg ±1 digit max. ±400 V
g
å±19.999 V 1M
Ω
g
g
±200 V
ä±1.9999 V 10 MΩmin.
ã±199.99 mV 10 MΩmin.
â1.0000 to 5.0000 V 1M
Ω
DC current æ±199.99 mA 1Ω±0.1%rdg ±1 digit max. ±400 mA
å±199.99 mA 10 Ω
g
g
±200 mA
ä±1.9999 mA 100 Ω
ã4.000 to 20.000 mA 10 Ω
AC voltage æ0.0 to 400.0 V 1M
Ω±0.3%rdg ±5 digit max. 700 V
g
å0.00 to 199.99 V 1M
Ω
g
g
ä0.000 to 19.999 V 1M
Ω±0.5%rdg ±10 digit max. 400 V
ã0.0000 to 1.9999 V 10 MΩmin.
g
g
AC current æ0.000 to 10.000 A (0.5 VA CT)
(See Note 4.) ±0.5%rdg ±20 digit max. 20 A
å0.0000 to 1.9999 A (0.5 VA CT)
(See Note 4.)
ä0.00 to 199.99 mA 1Ω±0.5%rdg ±10 digit max. 2A
ã0.000 to 19.999 mA 10 Ω
g
g
Note: 1. The “rdg” stands for “reading value.”
2. The accuracy is guaranteed for the input frequency range of 40 Hz to 1 kHz (except for æand åranges of AC current input) and
the ambient temperature of 23±5°C.
If the actual input in each of the following measuring ranges is 10% of the maximum value or less, the following accuracy values
will apply.
Input range Reliability
DC voltage æ,å,ä,ã,â±0.15% FS
DC current æ,å,ä,ã±0.1% FS
AC voltage æ±0.25% FS
g
å±0.5% FS
ä,ã±0.15% FS
AC current æ±0.15% FS
å±0.1% FS
ä,ã±1.0% FS
3. When using a DC voltage input model in the äand ãrange, do not open the input terminals. The input terminals can be opened,
however, if a resistor of approximately 1 MΩis connected to the input terminals.
1234
±1.9999 V
±199.99 mV
+--
1M
Ω
4. “0.5 VA CT” indicates consumption VA of the internal CT.

K3NX K3NX
5
En
g
ineerin
g
Data
3DERATING CURVE FOR SENSOR POWER SUPPLY
Max. current (mA)
Ambient temperature (°C)
Note: The derating curve shown is for standard installation.
The derating curve depends on the mounting direction.
Nomenclature
3K3NX
1. SV Display
2. PV Display
4. SV Display Status
5. ESC Key
6. Mode Key
7. Status Indicators
8. Teaching Indicator
9. RESET/TEACH Key
10. Up Key and Shift Key
3. Comparative Output
Status Indicators
Name Functions
1. SV display Displays the set value or parameter. Available for Set Value LED Models only.
2. PV display Displays the process value in addition to the max./min. value or parameter.
3. Comparative output
status indicators Displays the status of comparative output.
4. SV display status Indicates which comparative set value is currently on the SV display.
5. ESC Key Used to return to the RUN mode from the Setting, Protect, or Maintenance mode.
The process value, maximum value, or minimum value to be displayed can be selected.
6. Mode Key Used to enter the Setting mode.
Used to allow the PV display to indicate set values sequentially. Available for Basic Models only.
Used to indicate set values sequentially on the SV display. Available for Set Value LED Models only.
7. Status indicators HOLD: Lit when HOLD input is ON.
MAX: Lit when the maximum value is indicated on the PV display.
MIN: Lit when the minimum value is indicated on the PV display.
ZERO: Lit when the forced zero function is activated.
PROG: Lit or flashes while parameters are being set.
8. Teaching indicator Lit when the teaching function is enabled and flashes when the Intelligent Signal Processor is in teaching
operation.
9. RESET/TEACH Key The forced zero, maximum value, and minimum value are reset by pressing this key.
Teaching is available when the teaching function is enabled.
10.Up Key and Shift Key The digit being set is scrolled by pressing the Shift Key. The set value increases by one whenever the Up
Keyispressed.

K3NX K3NX
6
Operation
3SETTING PROCEDURES
The K3NX has four modes: RUN mode for normal operations, Setting mode for initial parameter input, Protect mode for lock-out configu-
ration, and Maintenance mode for initializing set values and user calibration. The parameters that are accessible on any individual K3NX
will vary depending on the Output Board installed. Refer to the
K3NX Operation Manual
for details.
RUN Mode: Remains in this mode under normal operation.
The process value or the max./min. value can be monitored.
Usingthefrontpanelkeys,thecomparativesetvaluecanbechangedandforced-zeroresetormax./min.valuesreset
can be performed.
Setting Mode: Used for making initial settings.
Includes four menus (Set value (,ç,â-), scaling (,äæ%â), setup (,â-.)), option (()-)) and the output test.
Protect Mode: Used for locking the front key operation or parameter changes.
Maintenance Mode: Used for initializing set values and user calibration of the inputs.
The user calibration is valid for selected input ranges.
Power ON
RUN mode
Setting mode
Maintenance mode
Protect mode
1s
1s
+
+
ESC ESC
ESC
ESC
When power is ON
,ç,â- - Program set values
,ç÷!! Enter set value HH
,ç÷ ! Enter set value H
,ç÷ % Enter set value L
,ç÷%% Enter set value LL
,äæ%â - Display scaling
"')÷ô Enter signal level for scaling point #2
ã,)÷ô Enter display reading for scaling point #2
"')÷õ Enter signal level for scaling point #1
ã,)÷õ Enter display reading for scaling point #1
ãâäø) Select decimal point
,â-.) - Program input range/Serial communications
"'ø- Specifying input range
á+â Select the supply frequency to eliminate inductive
noise
.ø'( Enter the unit no. for the host
å), Select the baud rate
%â' Select the word bit length
,å"- Select the stop bits
)+-1 Select the parity bits
()- - Supplementary settings related to display or control
æ. Set for averaging process value
,-"&â Set startup compensation time
!1, Enter hysteresis value
äø(.- Select the output pattern
%,â-÷! Enter the upper limit (H) of linear output range
%,â-÷% Enter the lower limit (L) of linear output range
+ø% Select the remote/local programming
-â,- - Generating simulated input for testing the output function
)+(- - Program lock-out configuration
æ%% Enable all key protection
,ç,â- Enable set value change prohibition
ëâ+( Enable prohibition of forced-zero reset using the
front panel keys
&&÷+,- Enableprohibitionofmax./min.valueresetusingthe
front panel keys
,âä+ Specify the menus to be protected against setting in
the setting mode.

K3NX K3NX
7
3PARAMETERS
Scaling ,äæ%
The Intelligent Signal Processor converts input signals into
desired physical values.
INPUT2: Any input value
DISPLAY2: Displayed value corresponding to INPUT2
INPUT1: Any input value
DISPLAY1: Displayed value corresponding to INPUT1
Input value
INPUT1 INPUT2
Input value
Displayed value Displayed value
DISPLAY1 DISPLAY2
DISPLAY1 DISPLAY2
INPUT2 INPUT1
Average Processing æç
The average processing function stabilizes displayed values by
averaging the corresponding analog input signals that fluctuate
dynamically or reducing the noise in the input signals.
Startup Compensation Time ,-"&â
The startup compensation time parameter keeps the
measurement operation from sending an unnecessary output
corresponding to instantaneous, fluctuating input from the
moment the K3NX is turned ON until the end of the preset period.
The compensation time can be set in a range from 0 to 99.9
seconds as the waiting time until the devices subject to
measurement become stable after the startup of the power
supply.
Set value L
Comparative
output L
Power supply
Time
Display
ööööö displayed
Startup compensation time
Hysteresis !1,
The hysteresis of comparative outputs can be set to prevent the
chattering of comparative outputs. For more details, refer to
Output Operation Timing in Run Mode
(found later in this
section).
Output Pattern Selection äø(.-
The patterns of comparative output are selectable according to
the level change. Select the pattern according to the application.
Standard Output
Set value HH
Set value H
Set value L
Set value LL
Comparative output HH
Comparative output H
PASS
Comparative output L
Comparative output LL
Zone Output
Set value HH
Set value H
Set value L
Set value LL
Comparative output HH
Comparative output H
PASS
Comparative output L
Comparative output LL
Set value HH
Set value H
Set value L
Set value LL
Comparative output HH
Comparative output H
PASS
Comparative output L
Comparative output LL
Level Output
Note: The following setting conditions must be satisfied, other-
wise, no zone output will turn ON correctly.
LL<L<H<HH

K3NX K3NX
8
Linear Output Range %,â-
A linear output range can be set as required. A value
corresponding to the maximum output value and that
corresponding to the minimum output value can be set.
Display
20 mA
4mA
Upper
limit
Output
Lower
limit
For the 4- to 20-mA
output type
Remote/Local Selection +ø%
Select remote programming when performing all settings through
the host devices and select local programming when performing
settings through key operation.
3TERMINAL ARRANGEMENT
Output unit
Input unit
18 19 20 21 22 23 24 25 26
10 11 12 13 14 15 16 17
1 2 3 4 5 6 7 8 9
Terminal Numbers
Note: Terminals 7 to 13 are connected internally.
Output
unit
Input
unit
3INPUT UNIT
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
HOLD RESET
COM
12 to 24 VDC
100 to 240 VAC
COM ZERO
Signal input terminal
12 VDC
+80mA-- When inputting the external control signals
through the open collector:
Transistor Inputs:
ON: Residual voltage must be 3 V max.
OFF: Leakage current must be 1.5 mA max.
The switching capacity must be 20 mA or greater.
When the external signal input is short-circuited,
a voltage of approximately 5 V will be applied to
between the terminals 5 to 7 and the COM
terminal, and a current of approximately 18 mA
(nominal value) will flow.
VD: DC Voltage Input AD: DC Current Input
1 2 3 4
±1.9999 V
±199.99 mV
±19.999 V
1to5V
±199.99 V
ANALOG
COM. 1 2 3 4 ANALOG
COM.
±1.9999 mA
±19.999 mA
4to20mA
±199.99 mA

K3NX K3NX
9
VA: AC Voltage Input AA: AC Current Input
1 2 3 4
0 to 1.9999 V
ANALOG
COM.
0 to 19.999 V
0 to 199.99 V
0 to 400.0 V
1 2 3 4
0 to 199.99 mA
0 to 1.9999 A
0 to 10.000 A
ANALOG
COM.
0 to 19.999 mA
3OUTPUT OPERATION TIMING IN RUN MODE (RELAY OR TRANSISTOR OUTPUTS)
The following timing chart is for a 5-comparative output board when the standard output pattern is selected.
Display
HH set value
H set value
L set value
LL set value
HH comparative output
H comparative output
PASS output
L comparative output
LL comparative output
Display value
Hysteresis
HYS
HYS
HYS
HYS
Note: The hysteresis value set in setting mode will be applied to all set values.

K3NX K3NX
10
3BLOCK DIAGRAM
Input circuit
Input signal
Control input Control input
circuit
Power supply
circuit
Control power
supply
Waveform
adjustment
circuit
Voltage stabilizing
circuit
Voltage stabilizing
circuit
Front panel keys
and switch LED
Output
circuit
8-bit
microcomputer
A/D conversion
circuit
A/D conversion circuit
8-bit microcomputer
Control input circuit
Auxiliary power supply
(input circuit)
Sensor power
supply
Voltage stabilizing
circuit
Application Examples
3DETECTION OF ALUMINUM DEPOSITION 3DETECTION OF DUST EXHAUST
CRT
Discrimination output
E3SA
4to20mA
H
PASS
L
K3NX
Detects via the E3SA the change in reflected light according
to the amount of aluminum deposition on the CRT.
The input is processed and displayed in percentage by the
scaling function.
The change in the density of the dust is detected via the
E3SA and discriminated by the K3NX.
Exhaust
Grinder Dust collecting machine
Alarm output
E3SA
4to20mA
K3NX
H PASS L