Omron K3GN User manual

1/32 DIN Digital Panel Meter K3GN F-5
Digital panel
indicators
1/32 DIN Digital Panel Meter
K3GN
1/32 DIN Digital Panel Meter for Downsizing
Equipment and Control Panels
• Compact size: 24x48x83 (HxWxD).
• Multi-input compatible: DC voltage/current, rotary pulse.
• Two display colors (switchable): green/red.
• Selectable outputs.
• CE marking and UL/CSA approval.
• Splash-proof construction (NEMA4X: equivalent to IP66).
Refer to Safety Precautions on page F-16.
Model Number Structure
■Model Number Legend
1. Input Type
ND: DC voltage/current, NPN
PD: DC voltage/current, PNP
2. Output Type
C: 2 relay contact outputs (SPST-NO)
C-FLK: 2 relay contact outputs (SPST-NO) and RS-485
C-L1: 2 relay contact outputs (SPST-NO) and DC current (0 to 20 mA, 4 to 20 mA)
C-L2: 2 relay contact outputs (SPST-NO) and DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V)
T1: 3 transistor outputs (NPN open collector)
T1-FLK: 3 transistor outputs (NPN open collector) and RS-485
T1-L1: 3 transistor outputs (NPN open collector) and DC current (0 to 20 mA, 4 to 20 mA)
T1-L2: 3 transistor outputs (NPN open collector) and DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V)
T2: 3 transistor outputs (PNP open collector)
T2-FLK: 3 transistor outputs (PNP open collector) and RS-485
3. Option
None: None
-400: Normally energized relays
4. Supply Voltage
24 VDC: 24 VDC
12 43
K3GN-@@-@-@24 VDC

F-6 1/32 DIN Digital Panel Meter K3GN
Ordering Information
■List of Models
Note: Refer to page 10 for information on models with normally energized relays.
Specifications
■Ratings
Note: 1. A control power supply capacity greater than the rated capacity is required when the Digital Panel Meter is turned ON. Do not forget to
take this into consideration when using several Digital Panel Meters. When power is supplied, all indicators will light and outputs will be
OFF. When using startup compensation time operation, the display will read “00000” and all outputs will be OFF.
2. Enabled only when using DC voltage/current input. (Min.time for control signal input: 80 ms)
Supply
voltage Input type Output type Model
Judgement output Data transmission output
24 VDC DC voltage, DC current,
or NPN input 2 relay contact outputs (SPST-NO) None K3GN-NDC 24 VDC
RS-485 K3GN-NDC-FLK 24 VDC
DC current (0 to 20 mA, 4 to 20 mA) K3GN-NDC-L1 24 VDC
DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V) K3GN-NDC-L2 24 VDC
2 relay contact outputs
(SPST-NO)
Normally energized
relays (See note.)
None K3GN-NDC-400 24 VDC
RS-485 K3GN-NDC-FLK-400 24 VDC
DC current (0 to 20 mA, 4 to 20 mA) K3GN-NDC-L1-400 24 VDC
DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V) K3GN-NDC-L2-400 24 VDC
3 transistor outputs (NPN
open collector) None K3GN-NDT1 24 VDC
RS-485 K3GN-NDT1-FLK 24 VDC
DC current (0 to 20 mA, 4 to 20 mA) K3GN-NDT1-L1 24 VDC
DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V) K3GN-NDT1-L2 24 VDC
DC voltage, DC current,
or PNP input 2 relay contact outputs
(SPST-NO) None K3GN-PDC 24 VDC
RS-485 K3GN-PDC-FLK 24 VDC
3 transistor outputs (PNP
open collector) None K3GN-PDT2 24 VDC
RS-485 K3GN-PDT2-FLK 24 VDC
Item K3GN-ND
With DC voltage, DC current, and NPN input K3GN-PD With DC voltage, DC current, and PNP input
Supply voltage 24 VDC
Operating voltage range 85% to 110% of the rated supply voltage
Power consumption (at max. load) (See note 1.) 2.5 W max. (at max. DC load with all indicators lit)
Input signal DC voltage, DC current, no-voltage contact, open collector
DC voltage/current
input A/D conversion Double integral method
Pulse signal input Pulse measurement
method Periodic measurement method
External power supply None
Control input Present value hold or forced zero (selectable) (See note 2.)
Outputs
(Outputs depend on
the model.)
Relay contact output 1 A, 30 VDC (resistive load), mechanical life: 50,000,000 operations min., electrical life: 100,000
operations min.
Transistor output Max. load voltage: 24 VDC, Max. load current: 50 mA, Leakage current: 100 μ A max.
Communications output RS-485 (2-wire, half-duplex)
Linear output DC current (0 to 20 mA DC, 4 to 20 mA: Load:
500 Ωmax., Resolution: Approx. 10,000)
DC voltage (0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC:
Load: 5k Ωmin., Resolution: Approx. 10,000)
---
Display Negative LCD (backlit LCD) display
7-segment digital display, character height: 7.0 mm, and single illuminated display
Main functions Scaling, prescaling, teaching, average processing, forced zero, display color selection, output type
selection, key protection, startup compensation timer, hysteresis
Ambient temperature Operating: −10°C to 55°C (with no condensation or icing)
Storage: −25°C to 65°C (with no condensation or icing)
Ambient humidity Operating: 25% to 85%
Altitude 2,000 m max.
Accessories Rubber packing, fixture, operation manual

1/32 DIN Digital Panel Meter K3GN F-7
Digital panel
indicators
■Characteristics
■Input Ranges: Measurement Range and Accuracy
Note: The shaded ranges indicate default settings.
Item K3GN-ND
With DC voltage, DC current, and NPN input K3GN-PD With DC voltage, DC current, and PNP input
Input signal DC voltage/current (4 to 20 mA, 1 to 5 V, ±5 V, ±10 V)
No-voltage contact (30 Hz max. with ON/OFF pulse width of 16 ms min.)
Open collector (5 kHz max. with ON/OFF pulse width of 90 μs min.)
Displayable range 5 digits (-19999 to 99999)
Sampling period 250 ms
Display refresh period Sampling period (sampling times multiplied by number of averaging times if average processing is selected.)
Comparative output response
time
(transistor outputs)
750 ms max. (transistor output)
(The time required for the judgment output to be output if the input signal rapidly changes from 15% to 95% or from 95% to 15%.)
Linear output response time 750 ms max. (The time required for the analog output to be
output if the output signal rapidly changes from 15% to 95% or
from 95% to 15%.)
---
Insulation resistance 20 MΩmin. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Dielectric strength 1,000 VAC for 1 min between external terminal and case.
Noise immunity ±480 V on power supply terminals in normal mode, ±1,500 V in common mode, ±1 μs, or 100 ns for square-wave noise with 1 ns
Vibration resistance Vibration frequency: 10 to 55 Hz, Acceleration: 50 m/s2for 10 min each in X, Y, and Z directions
Shock resistance Models with transistor outputs: 150 m/s2three times each in 3 axes, 6 directions
Models with contact outputs: 100 m/s2three times each in 3 axes, 6 directions
Weight Approx. 100 g (Main Unit only)
Degree of
protection Front panel NEMA4X for indoor use (equivalent to IP66),
Rear case IP20
Terminals IP00 and finger protection (VDE0106/100)
Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)
Approved standards UL508, CSA C22.2 No. 142
EMC (EMI) EN 61326 Industry
Emission Enclosure: EN55011 Group 1 class A
(EMS) EN 61326 Industry
Immunity ESD: EN 61000-4-2: 4 kV (contact discharge)
8 kV (air discharge)
Immunity RF-interference: EN 61000-4-3: 10 V/m (amplitude-modulated,
80 MHz to 1 GHz)
Immunity Fast Transient Noise: EN 61000-4-4: 2 kV (power line)
Immunity Burst Noise: 1 kV line to line (I/O signal line)
Immunity Surge: EN 61000-4-5: 2 kV line to ground (power line)
Immunity Conducted Disturbance EN 61000-4-6: 3 V (0.15 to 80 MHz)
Immunity Power Frequency Magnetic EN 61000-4-8: 30 A/m (50 Hz) continuous time
Input type
in-t
Analog
analg
Pulse
pulse
Remote
rmt
DC
current
input
DC voltage input Rotary pulse
Analog
range
range
4 to 20
mA
4-20
Analog
range
range
1 to 5 V
1-5
±5 V
5
±10 V
10
Pulse
frequency
p-fre
30 Hz
30
5 kHz
5k
Range of display
from 9999 to
99999 using
communications.
Connection
terminal E-FConnection terminal D-EConnection terminal B-C
Input
impedance 60 ΩInput impedance 1 MΩmin. --- ---
Measurement
accuracy ±0.1% full scale ± one digit max. (at 23±3°C) ±0.1% full scale ± one digit max. (at 23±5°C) ±0.1% full scale ± one digit max. (at 23±5°C) ---
Current range
(mA) 20.00
4.00
0.00
Voltage
range (V)10.00
5.000
0.000
−5.000
−10.00
Frequency
range
(Hz)
5000
4000
3000
2000
1000
0.0
5.500
0.000
5.500
−5.500
22.00
0.00
11.00
−11.00
30.00
0.05
5000
0

F-8 1/32 DIN Digital Panel Meter K3GN
■Input/Output Ratings
Relay Contact Output
(Incorporating G6K Relays)
Transistor Output
Communications Specifications
Linear Output
Item Resistive load (cosφ= 1)
Rated load 1 A at 30 VDC
Rated through current 1 A max. (at COM terminal)
Max. contact voltage 60 VDC
Max. contact current 1 A (at COM terminal)
Max. switching capacity 30 VA
Min. permissible load
(P level, reference value) 10 mV, 10 μA
Mechanical life 50,000,000 operations min.
(at a switching frequency of
36,000 operations/hr)
Electrical life
(at an ambient
temperature of 23°C)
100,000 operations min.
(at the rated load with a switching
frequency of 1,800 operations/hr)
Rated load voltage 24 VDC
Max. load current 50 mA
Leakage current 100 μA max.
Item RS-485
Communications method 2-wire, half-duplex
Synchronization method Start-stop synchronization
Baud rate 1,200/2,400/4,800/9,600/19,200 bps
Transmission code ASCII
Commu-
nications Reading/ Writing to the
K3GN
Read/write comparative set values,
read/write scaling values, enable/
disable the writing of data through
communications, forced-zero control,
and other data.
Item 0 to
20 mA 4 to 20 mA 0 to 5 V 1 to 5 V 0 to 10 V
Permissible load
impedance 500 Ωmax. 5 kΩmin.
Resolution Approx. 10,000
Output error ±0.5% full scale ±0.5 full scale.
±0.15 V at 1 V or less
(no output for 0 or less)

1/32 DIN Digital Panel Meter K3GN F-9
Digital panel
indicators
Nomenclature
Name Functions
1. Main display Displays process values, parameters, and set values.
2. Status indicators OUT1 Lit when output 1 is ON.
OUT2 Lit when output 2 is ON.
SV Lit when a set value is being displayed or changed.
TLit when the teaching function is enabled. Flashes when the K3GN is in teaching operation.
Lit when a calibration value is being displayed during user calibration. Flashes while reading a calibra-
tion value.
ZERO Lit while the forced-zero function is activated.
HOLD Lit when HOLD input is ON.
CMW Lit when communications writing is “enabled” and is out when it is “disabled.”
3. Level indicator Displays the current level that the K3GN is in. (See below for details.)
4. Level Key Used to change the level.
5. Mode Key Used to allow the Main display to indicate parameters sequentially.
6. Shift Key Used to enable that set value to be changed. When changing a set value, this key is used to move
along the digits.
7. Up/Zero Key Used to change a set value. Used to set or clear a forced-zero function when a measurement value is
being displayed.
1. Main display
2. Status indicators
3. Level indicator
4. Level key
2. Status indicators
7. Up/Zero key6. Shift key5. Mode key
Level indicator Level
pProtect
Not lit Operation
aAdjustment
sInitial setting
cCommunications setting
fAdvanced function setting
uUser calibration

F-10 1/32 DIN Digital Panel Meter K3GN
Models with Normally Energized Relays
K3GN-NDC-@-400 24 VDC
•The drive operation for the output relay is reversed in these models.
•Relay contacts can be made open (i.e., OFF) when comparative set
values are being judged. This is effective when constructing systems
that take failsafe measures into consideration.
List of Models
Models with Normally Energized Relays
K3GN-NDC-400 24 VDC
K3GN-NDC-FLK-400 24 VDC
K3GN-NDC-L1-400 24 VDC
K3GN-NDC-L2-400 24 VDC
Relation between Output Type and Relay
Output Operation
Hysteresis
Set value
Measurement
value
OutputON
OFF
Hysteresis
Upper-limit
set value
Lower-limit
set value
Measurement
value
OutputON
OFF
Hysteresis
Hysteresis
Set value
Measurement
value
OutputON
OFF
Upper limit
Lower limit
Upper and lower limits
Note: If Upper/Lower Limit is selected, the
upper limit and lower limit for the com-
parative set value can be set individu-
ally and will be displayed for OUT1 and
OUT2.

1/32 DIN Digital Panel Meter K3GN F-11
Digital panel
indicators
Connections
■Terminal Arrangement
Terminal No. Name Description
A-BOperation power Connect the operation power supply.
C-BEvent input or pulse/contact input Operates as follows depending on parameter
setting:
•Holds process value.
•Calibrate the process value to zero and clear
the forced-zero function.
•Pulse or contact input.
C-A
D,F-EAnalog input Connect the voltage or current analog input.
G-HCommunications RS-485 communications terminals.
Linear output 0 to 20 mA DC, 4 to 20 mA DC
0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC
I,K-LOutputs Outputs relay or transistor outputs. There is
also a PASS output for models with transistor
outputs.
I,J,K-L
B (+) A (−)
78
78
C
12 3
123
A
9101112
9101112
9101112
D
456
B
CD
AB
78 9101112
123 456
Output terminals
Input terminals
NC NC
RS-485
Models with NPN inputsModels with PNP inputs
OUT1
PA S S
NC
OUT2
COM
OUT1
OUT2
COM
OUT1 PASS OUT2 COM
Voltage Current
Analog input
COM
Event or pulse/contact input
Event or pulse/contact input
Analog input
Models without
communications
Models with
communications
Operation
power supply
24 VDC
Operation
power supply
24 VDC
Models with
PNP transistor outputs
Models with
NPN transistor outputs
Models with
relay outputs
(+) (−)
78
Models with
linear output

F-12 1/32 DIN Digital Panel Meter K3GN
■Block Diagram
■Input Circuits
Analog Input (DC Voltage/Current)
Use terminal 5 for analog common.
Comparative Output
Contact Output
Transistor Output
Pulse Input/Control Event Input
(HOLD/ZERO)
•Use terminal 2 for the common terminal.
•Use the NPN open collector or the no-voltage contacts for the
control input.
NPN Input
PNP Input
DisplayKey
Drive circuit
Drive circuit
Drive circuit
Constant voltage circuit 1
Power supply circuit
Input circuit
Operating power supply
Constant voltage circuit 2
EEPROM
Analog input
terminal
Pulse/
Control
input
terminal
Control input
circuit
A/D
conversion
circuit
Waveform
rectification
circuit
Micro-
computer
Note: 1. Transistor output models only.
2. Linear output models only.
3. Relay output models only.
4. Models with communications functions only.
Communica-
tions driver
Transistor output
(See note 1.)
Contact output
(See note 3.)
Communications terminal
(See note 4.)
X
Linear output
(See note 2.)
Output
circuit
Output
circuit
Drive circuit
Voltage
input
COM
To A/D
−
+Current
input
COM
To A/D
−
+
6
5
4
5
X
5 V
OUT1
OUT
2
9
10
11
12
8.2 Ω
8.2 Ω
8.2 Ω
OUT1
OUT2
PA S S
COM 9
10
11
12
8.2 Ω
8.2 Ω
8.2 Ω
OUT1
OUT2
PA S S
COM
NPN Output PNP Output
1
2
3
2.35 kΩ
4.7 kΩ
24 VDC
24 V
3
4.7 kΩ
2.35 kΩ
2
24 VDC +
24 VDC −
1
Hold/Zero Pulse

1/32 DIN Digital Panel Meter K3GN F-13
Digital panel
indicators
Linear Output Note: The commons for linear output and transistor output on models
with L1 and L2 are connected internally.
Depending on how the common is wired for externally
connected devices, unwanted current paths for the linear
output signal in the circuit may prevent the output signal from
being output.
When connecting an external device, externally connect a relay
to the transistor output or provide another means of insulation.
Operation
■Main Functions
Scaling
The K3GN includes a scaling function that can convert the input
signal to a desired value and display that value.
The displayed values can be freely adjusted to shift values, to create
reversed displays, or to create positive/negative displays.
Teaching
Teaching is used when using scaling or setting comparative set
values to set the present measurement values as the set values
instead of inputting with the Shift and Up/Zero Keys. Teaching is
useful for making settings while checking the operation status of the
K3GN.
Average Processing
Average processing can be performed for measurement values using
four levels (OFF, 2 times, 4 times, or 8 times). Average processing
stabilizes displayed values by averaging the corresponding input
signals that fluctuate dynamically. Select the appropriate number of
averaging times depending on the application.
Forced-zero Function
It is possible to shift from a
value to the zero point with
one touch of the Up/Zero
Key on the front panel (for
example, when adjusting
reference values).
Note: This function can be
used only when
forced-zero operation
protection is released.
Changing the Display Color
The color of the value displayed can be set to either red or green.
Make the setting according to the purpose and application of the
equipment in which the K3GN is installed. The display color can also
be set to change from green to red, or from red to green, according
to the status of the comparison criteria.
Output Type Selection
Output operation for comparative set values can be freely selected.
Upper limit: Output ON if the measurement value ≥comparative set
value.
Lower limit: Output ON if the measurement value ≤comparative set
value.
Upper/lower limit: Output ON if the measurement value ≥
comparative upper-limit set value or if the measurement value is ≤
the comparative lower-limit value.
Key Protection
Key protection is used to restrict changes to displays and settings
using the front panel keys and to restrict menu display and
movement of operation levels. This function is effective for preventing
misuse during operation.
Startup Compensation Time
(Rotary Pulse Input Only)
The startup compensation time parameter keeps the measurement
operation from sending an unnecessary output corresponding to
instantaneous, fluctuating input from the moment the K3GN is turned
ON until the end of the preset period.
Hysteresis
The hysteresis of comparative outputs can be set to prevent the chat-
tering of relay or transistor outputs.
−
+
7
+
−
5 kΩ
min. 8
L
−
+
7
+
−
500 Ω
max.
Linear voltage output Linear current output
8
L
INPUT1 INPUT2 Input value
DISPLAY1
DISPLAY2
()()
Display
value
INPUT2
INPUT1
Input
value
DISPLAY1
DISPLAY2
Display
value
/ZERO
ZEROOUT1
OUT2
SV
HOLD
CMW
K3GN

F-14 1/32 DIN Digital Panel Meter K3GN
Dimensions
Note: All units are in millimeters unless otherwise indicated.
■Wiring Precautions
•Wire the power supply with the correct polarity. Wiring with incorrect polarity may result in damage or burning.
•Wire the terminals using crimp terminals.
•Tighten terminal screws to a torque of approx. 0.5 N·m.
•Wire signal lines and power lines separately to reduce the influence of noise.
■Wiring
Power Supply
•Input 24 VDC to terminals 1 and 2.
•Use M3 crimp terminals of the type shown below.
Measurement Input
The following table shows the relation between input ranges and
input terminals.
/ZERO
ZERO
OUT1
OUT2
SV
HOLD
CMW
T
K3GN
380
22
44.8
48
24
35
Separate mounting Gang mounting
22.2
+0.3
0
22.2
+0.
3
0
45
+0.6
0
(48 ×No. of Panels −2.5)
+1.0
0
40 min.
The products cannot be
made waterproof when
gang-mounted.
7 mm
3.6 mm
Main Display Character Size
The K3GN uses M3 terminals. A terminal
cover is provided.
Panel Cutout Dimensions
K3GN
•For installation, insert the K3GN
panel into the rectangular hole,
insert the adaptor from the rear, and
push it in to reduce the gap between
the panel surface and the adaptor.
Secure the Unit with the screws.
For water-proof installation, insert
the rubber gasket onto the body of
the K3GN.
•If multiple mounted Units are used,
make sure the ambient temperature
for the K3GN does not exceed the
specified temperature.
1
2
24 VDC
5.8 mm max.
5.8 mm max.
Input range Input
terminals
DC voltage/DC current 4 to 20 mA E-F
1 to 5 V D-E
±5 V
±10 V
No-voltage contacts and NPN open collector
(Models with NPN inputs)
B-C
No-voltage contacts and PNP open collector
(Models with PNP inputs)
A-C
Be sure to read the Precautions for Correct Use and other information required when using the K3GN in the
following user’s manual.
K3GN Digital Panel Meter User’s Manual (Cat.No. N102)