Omron K3GN User Manual

Cat. No. N102-E1-04

K3GN

1/32 DIN Digital Panel Meter

USER’S MANUAL

PREFACE

This User’s Manual provides you with information necessary for use of the K3GN series of digital panel meters.

Please read this manual carefully to ensure correct and efficient use of the product. Keep this manual handy for future reference.

General Precautions

If contemplating using the product in the following environments or for the following equipment, first contact a sales representative of the company and then accept responsibility for incorporating into the design fail-safe operation, redundancy, and other appropriate measures for ensuring reliability and safety of the equipment and the overall system.

(1)Environments deviating from those specified in this manual

(2)Nuclear power control systems, traffic (rail car/automobile/aircraft) control systems, medical equipment, amusement equipment, and rescue and security equipment

(3)Other equipment that demands high reliability, including those related to the safety of life and property

About the Contents of the Manual

(1)Any reproduction, full or in part, of the manual is prohibited without prior written permission from the company.

(2)Specifications in the manual may be subject to change without notice.

(3)Information in the manual has been carefully checked for accuracy. If finding any suspicious or erroneous descriptions in the manual, however, you are kindly requested to contact a branch office of the company. In such a case, please let us know the Cat. No. shown on the front cover of the manual.

I

Other Informations

1Warranty

(1)Warranty Period

The warranty period for an OMRON Product is one year from either the date of purchase or the date on which the OMRON Product is delivered to the specified location.

(2) Extent of Warranty

If an OMRON Product is subject to a failure for which OMRON is responsible during the warranty period, either a replacement product will be provided or the defective product will be repaired free of charge at the place of purchase, This warranty, however, will not cover problems that occur as a result of any of the following.

a)Using the OMRON Product under conditions or in an environment not described in catalogs or in the specifications, or not operating the OMRON Product according to the instructions contained in catalogs or in the specifications.

b)Problems caused by something other than the OMRON Product.

c)Modifications or repairs performed by a party other than OMRON.

d)Using the OMRON Product for other than its designed purpose.

e)Problems that could not have been foreseen with the level of science and technology that existed at the time the OMRON Product was shipped.

f)Problems caused by an Act of God or other circumstances for which OMRON is not responsible.

This warranty covers only the OMRON Product itself. It does not cover any other damages that may occur directly as a result of a problem with the OMRON Product.

2 Limitations of Liability

(1)OMRON shall not be responsible for special, indirect, or consequential damages originating in an OMRON Product.

(2)For programmable OMRON Products, OMRON does not accept responsibility for any programming that is performed by a party than OMRON, or for any results arising from that programming.

3 Applicable Conditions
(1) When using OMRON Products in combination with other products, it is use’s	responsibility to confirm

the suitability of the OMRON Products for the system, devices, and equipment that are being used. OMRON accepts no responsibility for the suitability of OMRON Products used in combination with other products.

(2) When using OMRON Products in any of the following applications, consult an OMRON representative and check specifications to allow sufficient leeway in ratings and performance, and to implement suitable safety measures, such as safety circuits, to minimize danger in the event of an accident.

a)Outdoor applications, applications with potential for chemical contamination or electrical interference, or application under conditions or environments not described in catalogs.

b)Nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, or equipment regulated by government or Industrial standards.

c)Other systems, machines, and equipment that may have a serious influence on human life and property.

d)Equipment requiring a high level of reliability, such as gas, water, or electrical supply systems, and systems that operate 24 hours a day.

e)Other applications requiring a high level of safety, corresponding to points a) to d), above.

(3)When OMRON Products are used in an application that could pose significant risk to human life or property, the overall system must be designed so that the required safety can be ensured by providing notice of the danger and incorporating redundancy into the design. Make sure that OMRON Products are appropriately wired and mounted to serve their intended purpose in the overall system.

(4)Application examples provided in catalogs are for reference only. Confirm functionality and safety before actually using the devices and equipment.

(5)To prevent unexpected problems from arising due to the OMRON Product being used incorrectly by the customer or any other party, make sure that you understand and carefully observe all of the relevant prohibitions and precautions.

4 Changes to Specifications

Specifications and accessories to the products in catalogs may be changed as needed to improve the products or for any other reason. Check with your OMRON representative for the actual specifications for OMRON Products at the time of purchase.

5 Applicability

The above information assumes that business and product application will be conducted in Japan. For business and application outside of Japan, consult with your OMRON representative.

II

Signal Words and Safety Notices

Signal Words

In this manual, safety notices are divided into WARNING and CAUTION according to the hazard level.

As both of WARNING and CAUTION notices contain important information for ensuring safety, be sure to observe them.

A signal word indicating a potentially hazardous CAUTION situation which, if not avoided, may result in minor or

moderate injury or property damage.

Symbols

Indicates a CAUTION or WARNING with the specific contents indicated in the triangle and described in text. The example at the left is for a general precaution.

Indicates a prohibition with the specific contents described in text, which is general unless otherwise classified.

Indicates a prohibition with the specific contents indicated behind the circle and slash and described in text. The example at the left is for prohibiting disassembling.

Indicates a mandatory action with the specific contents indicated in the circle and described in text. The example at the left is for a general mandatory action that is not classified otherwise.

III

Safety Notices

CAUTION

Do not touch the terminals while power is being supplied.

Doing so may possibly result in electric shock

Do not allow pieces of metal, wire clippings, or fine metallic shavings or filings to enter the product.

Doing so may occasionally result in minor or moderate injury or in property damage due to electric shock, fire, or malfunction caused by internal short circulation..

Do not use the product in locations where flammable or explosive gases are present. Doing so may occasionally result in minor or moderate explosion, causing minor or moderate injury, or property damage.

Do not use the equipment for measurements within Measurement Categories or (according to IEC61010-1). Doing so may occasionally cause unexpected operation, resulting in minor or moderate injury, or damage to the equipment. Use the equipment for measurements only within the Measurement Category for which the product is designed.

Failure to perform correct setting of the product according to the application may occasionally cause unexpected operation, resulting in minor or moderate injury, or damage to the equipment.

Ensure safety in the event of product failure by taking safety measures, such as installing a separate monitoring system.

Ensure safety in the event of product failure by taking safety measures, such as installing a separate monitoring system.

Product failure may occasionally prevent operation of comparative outputs, resulting in damage to the connected facilities and equipment.

Tighten the screws on the terminal block and the connector locking screws securely using a tightening torque within the following ranges. Loose screws may occasionally cause fire, resulting in minor or moderate injury, or damage to the equipment.

Terminal block screws : 0.43 to 0.58 N·m. Connector locking screws :

Do not attempt to disassemble, repair, or modify the product. Doing so may occasionally result in minor or moderate injury due to electric shock.

IV

Precautions for Safe Use

Precautions for the environment.

(1)Do not use the product in the following locations.

•Locations subject to direct radiant heat from heating equipment

•Locations here the product may come into contact with water or oil

•Locations subject to direct sunlight

•Locations where dust or corrosive gases (in particular, sulfuric or ammonia gas) are present

•Locations subject to extreme temperature changes

•Locations where icing or condensation may occur

•Locations subject to excessive shocks or vibration

(2)Do not use the product in locations subject to temperatures or humidity levels outside the specified ranges or in locations prone to condensation. If the product is installed in a panel, ensure that the temperature around the product (not the temperature around the panel) does not go outside the specified range. Parts life is dependent on temperatures. A part life shortens when the temperature rises, and it lengthens when the temperature falls. Parts life can be lengthened by lowering the temperature inside the product.

(3)In order to prevent inductive noise, wire the lines connected to the product separately from power lines carrying high voltages or currents. Do not wire in parallel with or in the same cable as power lines. Other measures for reducing noise include running lines along separate ducts and using shield lines.

(4)Do not install the product near devices generating strong high-frequency waves or surges. When using a noise filter, check the voltage and current and install it as close to the product as possible. If several products are mounted side-by-side or arranged in a vertical line, the heat dissipation will cause the internal temperature of the product to rise, shortening the service life. If necessary, cool the products using a fan or other cooling method.

(5)Take care when cleaning the product, because the exterior of the product contains organic solvent (thinner, benzine, etc.), strong alkaline material and strong acid material.

(6)Avoid storing in high humidity or in a corrosive gas environment (including during transportation)

Precautions for Safe Use.

(1)Use and store within the proper temperature and humidity described in the specifications.

(2)Provide sufficient space around the product for heat dissipation.

(3)When using the product stored unused over a year after purchasing, the product features may not be utilized sufficiently.

(4)Avoid storing outdoors and in a place that receives direct sunlight (including during transportation).

(5)The service life of the output relays depends on the switching capacity and switching conditions. Consider the actual application conditions and use the product within the rated load and electrical service life. Using the product beyond its service life may result in contact welding or burning.

(6)Be sure to confirm the name and polarity for each terminal before wiring the terminal block and connectors. Faulty wiring causes destruction or burnout of internal parts.

(7)Use the product within the noted supply voltage and rated load.

(8)Do not connect anything to unused terminals.

(9)Output turns OFF when the mode is changed or settings are initialized. Take this into consideration when setting up the control system.

V

(10)Install an external switch or circuit breaker and label them clearly so that the operator can quickly turn OFF the power.

(11)Ensure that the rated voltage is achieved no longer than 2 s after turning the power ON. When applying a voltage gradually, power supply may not be reset or output functions indeterminately.

(12)Mount to a panel between 1 and 5 mm thick.

(13)Use the specified size of crimp terminals (M3, width : 5.8 mm max.) for wiring. To connect bare wires, use AWG 28 to AWG 16 to wire the power supply terminals and AWG 22 to AWG 14 for other terminals. (Length of exposed wire : 6 to 8 mm)

(14)Allow the product to operate without load for at least 15 minutes after the power is turned ON.

VI

Precautions for Correct Use

(1)Install the product horizontally. Display error has the risk of becoming larger than the standard because heat cannot be radiated.

(2)When using a noise filter on the power supply, check that the filter is suitable for the supply voltage and current ratings, and then attach the noise filter as close as possible to the K3GN.

<Examples of noise prevention schemes>

	Line filter
24VDC	Power	Digital Panel
	supply
		Meter
	input

Shielded cable

Signal	Digital Panel
input	Meter

Connect in the direction that best reduces noise.

(3) If placed near the product, radios, TVs, or other wireless devices may suffer reception interference..

VII

Alphabetic Characters for Setting Data

This manual uses the following alphabetic characters for setting data.

a

b

c

d

e

f

g

h

i

j

k

l

m

A

B

C

D

E

F

G

H

I

J

K

L

M

n

o

p

q

r

s

t

u

v

w

x

y

z

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

VIII

Table of Contents

			................................................................................................................PREFACE	I
			General Precautions..................................................................................................	I
			Other Informations .................................................................................................	II
			Signal Words and Safety Notices ..........................................................................
			Safety Precautions .................................................................................................	IV
			Installation and Noise Prevention Tips...................................................................	V
			.................................................................Alphabetic Characters for Setting Data	VI
CHAPTER 1	INTRODUCTION .............................................................			1
	1.1		Main Features..........................................................................................................	2
	1.2		Model Number Legend............................................................................................	4
	1.3		I/O Circuits..............................................................................................................	5
	1.4		Parts Name and Function.........................................................................................	8
CHAPTER 2	INSTALLATION AND CONNECTION ..............................			9
	2.1		Installation.............................................................................................................	10
	2.2		I/O Terminal Connections .....................................................................................	12
CHAPTER 3	APPLICATION EXAMPLES...........................................			15
	3.1		Monitoring the Remaining Quantity of Soup ........................................................	16
	3.2		Monitoring the Load Current of a Motor...............................................................	18
	3.3		Monitoring the Quantity of Dust ...........................................................................	20
	3.4		Monitoring the Internal Pressure of a Tank...........................................................	22
	3.5		Monitoring the Rotational Speed of a Motor.........................................................	24
	3.6		Using the Product as a Digital Indicator for PLC..................................................	26
CHAPTER 4	INITIAL SETTING..........................................................			29
	4.1		Using the Product as a process meter ....................................................................	30
	4.2		Using the Product as a Tachometer .......................................................................	32
	4.3		Using the Product as a Digital Indicator for PLC Data .........................................	34
CHAPTER 5	OPERATION..................................................................			37
	5.1		Levels ....................................................................................................................	38
	5.2		Moving among Levels...........................................................................................	39
	5.3		Parameters .............................................................................................................	42
	5.4		Set Values..............................................................................................................	44
	5.5		Operation Level.....................................................................................................	45
	5.6		Communication Writing Control...........................................................................	47

IX

	5.7	Key Protect Setting ................................................................................................	48
	5.8	Selecting an Input Type .........................................................................................	50
	5.9	Selecting an Analog Range....................................................................................	51
	5.10	Selecting an Input-pulse Frequency Range............................................................	52
	5.11	Specifying the Scaling Factor for Analog Input/Digital Data Display...................	53
	5.12	Specifying the Scaling Factor for Input Pulse Frequency......................................	55
	5.13	Specifying the Decimal Point Position ..................................................................	58
	5.14	Selecting the Output Operating Action ..................................................................	59
	5.15	Performing Linear Output......................................................................................	60
	5.16	Specifying Communication Parameters.................................................................	63
	5.17	Clearing All Parameters.........................................................................................	65
	5.18	Specifying the Number of Measurements for Averaging ......................................	66
	5.19	Specifying the Function of the Event Input ...........................................................	67
	5.20	Specifying the Hysteresis.......................................................................................	69
	5.21	Specifying the Auto-zero Time..............................................................................	71
	5.22	Specifying the Startup Compensation Time ..........................................................	73
	5.23	Changing the Display Color...................................................................................	75
	5.24	Changing the Display Auto-return Time................................................................	77
	5.25	Changing the Move-to-Protect-Level Time ...........................................................	79
	5.26	Changing the Send Waiting Time..........................................................................	81
CHAPTER 6	FUNCTION DESCRIPTION ..........................................		83
	6.1	Measurement..........................................................................................................	84
	6.2	Scaling ...................................................................................................................	86
	6.3	Auto-zero/Startup Compensation...........................................................................	88
	6.4	Average Processing................................................................................................	89
	6.5	Event Input/Pulse Input..........................................................................................	90
	6.6	Process Value Hold................................................................................................	91
	6.7	Forced-zero ............................................................................................................	92
	6.8	Comparative Output...............................................................................................	93
	6.9	Hysteresis...............................................................................................................	94
	6.10	Display Color Change............................................................................................	95
CHAPTER 7	COMMUNICATIONS .....................................................		97
	7.1	Communication Protocols......................................................................................	98
	7.2	Data Format Structure............................................................................................	99
	7.3	Structure of Command/Response Text ................................................................	101
	7.4	Variable Area.......................................................................................................	102
	7.5	Read from Variable Area ...................................................................................	103
	7.6	Write to Variable Area .......................................................................................	104
	7.7	Operation Instructions..........................................................................................	105
	7.8	Setting Areas........................................................................................................	106
	7.9	Commands and Responses...................................................................................	107
	7.10	Variable Area Map...............................................................................................	115
	7.11	Communications Control Flow............................................................................	118
	7.12	Programming Example ........................................................................................	123

X

CHAPTER 8	USER CALIBRATION..................................................		127
	8.1	User Calibration ..................................................................................................	128
	8.2	User Calibration Processes ..................................................................................	130
CHAPTER 9	TROUBLESHOOTING GUIDE ....................................		133
	9.1	Error Indications..................................................................................................	134
	9.2	Troubleshooting Table.........................................................................................	135
	APPENDIX ...................................................................		137
		Specifications ............................................................................................	138
		Parameter List............................................................................................	142
		ASCII Code Table......................................................................................	143

XI

1.1 Main Features

CHAPTER

1 INTRODUCTION

This chapter provides an overview of the product.

1.1Main Features 2

1.2Model Number Legend 4

1.3I/O Circuits 5

Input Circuit Diagrams/Output Circuit Diagrams/ Internal Block Diagram

1.4 Parts Name and Function 8

1

INTRODUCTION

INTRODUCTION

CHAPTER 1 INTRODUCTION

1.1 Main Features

The K3GN is a digital panel meter that is capable of converting an input signal into a digital value and displaying it on the main indicator.

The main futures of the product include the following.

Measurement	This feature measures an input signal and displays it as a digital value.
	An analog value (voltage/current), a rotational speed (pulses), or digital data
	received via communication function can be selected as an input signal.

Voltage/current

		K3GN
ON/OFF	OUT1	T	((((8	ZERO
	OUT2	8		HOLD
	SV			CMW

/ZERO

RS485

PLC

PC

Scaling This feature converts an input signal into a desired physical value

The figure on the right shows a scaling example where input signals from a pressure sensor ranging from 4 to 20 mA are converted into values ranging from 0 to 100 (kPa). Scaling will enable you to handle physical quantities easily and intuitively.

	Readout
	100kPa
	0kPa	Input
		20mA
	4mA

Comparative		This feature compares a scaled (process) value with a programmed OUT set value
Output		and produces output according to the comparison result.
		This is useful in monitoring various systems for malfunction or determining
		whether products are within acceptance limits.

K3GN

OUT1		T	((((8		ZERO
OUT2		8			HOLD
SV					CMW

/ZERO

Three types of comparative outputs are available: those produced at the OUT upper-limit value, the OUT lower-limit value, and both the OUT values.

OUT upper		OUT upper
limit value	OUT lower	limit value
	limit value
		OUT
		lower
		limit
		value
Comparative output	Comparative output	Comparative output
Comparative output	Comparative output	Comparative output produced at
produced at the OUT upper	produced at the OUT lower	the OUT upper and lower limit
limit value	limit value	values

2

1.1 Main Features

	Process	This feature enables a process value	Process
	Value Hold	to be held while the external event
			value
		input stays ON.
		The outputs are also retained.
			HOLD input
	Forced-zero	This feature shifts a process value to zero, and can be used to evaluate and display
		the deviation of a process value from a reference value.
		The forced-zero function can be activated by using the /ZERO key on the front
		panel, via the event input terminal, or communications.

	Process
	value
Forced-zero value	Measurement value
(shifted value)	after executing the
	forced-zero function
	ZERO input

Display Color

Change

Communi-cation

This feature allows programming of the display color. In the example shown below, the display color is programmed so that it changes from green to red when a comparative output turns ON. The display color can also be programmed so that it changes red to green or is fixed to red or green.

			Red
		8	1!236
		T
OUT1 value		Green
	8	1*005
	T
OUT2 value

8T 1(781

Red

This feature allows the host PC to read process values from the product or read/write various parameter settings from/to the host PC.

The host PC provides logging of measured data and remote control to the product.

485 232C

	8((((8				8((((8				8((((8
	T				T				T

INTRODUCTION

3

INTRODUCTION

CHAPTER 1 INTRODUCTION

1.2 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

List of Models

Supply

Input type

Output type

Model

voltage

Judgement output

Data transmission output

None

K3GN-NDC 24 VDC

2 relay contact outputs

RS-485

K3GN-NDC-FLK

24 VDC

DC current (0 to 20 mA,

K3GN-NDC-L1

24 VDC

(SPST-NO)

4 to 20 mA)

DC voltage (0 to 5 V,

K3GN-NDC-L2

24 VDC

1 to 5 V, 0 to 10 V)

DC voltage,

2 relay contact outputs

None

K3GN-NDC-400

24 VDC

RS-485

K3GN-NDC-FLK-400

24 VDC

DC current,

(SPST-NO)

DC current (0 to 20 mA,

K3GN-NDC-L1-400

24 VDC

or NPN

Normally energized

4 to 20 mA)

input

relays (See note.)

24 VDC

DC voltage (0 to 5 V,

K3GN-NDC-L2-400

24 VDC

1 to 5 V, 0 to 10 V)

None

K3GN-NDT1

24 VDC

3 transistor outputs

RS-485

K3GN-NDT1-FLK

24 VDC

DC current (0 to 20 mA,

K3GN-NDT1-L1

24 VDC

(NPN open collector)

4 to 20 mA)

DC voltage (0 to 5 V,

K3GN-NDT1-L2

24 VDC

1 to 5 V, 0 to 10 V)

DC voltage,

2 relay contact outputs

None

K3GN-PDC 24 VDC

DC current,

(SPST-NO)

RS-485

K3GN-PDC-FLK

24 VDC

or PNP

3 transistor outputs

None

K3GN-PDT2 24 VDC

input

(PNP open collector)

RS-485

K3GN-PDT2-FLK

24 VDC

Note: Refer to page 6 for information on models with normally energized relays.

4

1.3 I/O Circuits

1.3 I/O Circuits

Input Circuit Diagrams

Analog Input

			-					-
	4	A		To	AD		6		To AD
Voltage			+			Current		+
			B					60Ω
COM	5					COM	5
				A+B = 1MΩ

Voltage input Current input

Event Input/Pulse Input

	1	24VDC+	1
24VDC+
HOLD/ZERO	4.7KΩ		2.35KΩ
Pulse	3		3
	2.35KΩ	HOLD/ZERO
		Pulse	4.7KΩ
	2		2
24VDC-		24VDC-
	NPN input		PNP input

Output Circuit Diagrams

Contact Output

	5V	9	OUT1
5V		11	OUT2

12 COM

5

INTRODUCTION

INTRODUCTION

CHAPTER 1 INTRODUCTION

Transistor Output

8.2Ω	OUT1	12	COM
9
8.2Ω	PASS	11	OUT2
10		8.2Ω
8.2Ω	OUT2	10	PASS
11		8.2Ω
12	COM	9	OUT1
		8.2Ω
NPN output		PNP output

Linear Output

			-
+	-	+	+
	7	7
5KΩ min. L	+	500Ω max. L
-	8	- 8

Linear voltage output Linear current output

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

Note: If Upper/Lower Limit is selected, the upper limit and lower limit for the comparative set value can be set individually and will be displayed for OUT1 and OUT2.

6

1.3 I/O Circuits

Internal Block Diagram

	Key	Display
		Transistor
		output
Input circuit	AD	Drive circuit
	convertor

Analog input		Output	*4
terminal	Drive circuit		Linear current/
		circuit
			Voltage output
	EEPROM
	Microcomputer	Output	Contact
	Drive circuit
		circuit	output	*2
	Drive circuit	Communi-
		cation
Control	Waveform	driver	Communi-
input	recitification
circuit	circuit		cation
Event input/			terminal	*3
pulse input
terminal
	Constant-voltage	Constant-voltage
	circuit 1	circuit 2

INTRODUCTION

					*1 Available only for the product with transistor output
	Power supply
					*2 Available only for the product with relay output
		circuit
					*3 Available only for the product with communication interface
					*4 Available only for the product with linear current/voltage output
		Operation
		power supply

7

INTRODUCTION

CHAPTER 1 INTRODUCTION

1.4 Parts Name and Function

	Operation indicator		Operation indicator
	section	Main indicator	section
		K3GN
Level	OUT1	T	ZERO
	SV	8((((8	CMW
	OUT2		HOLD

indicator

/ZERO

Level key

Mode key

Shift key

Up/Zero key

Name

Function

Main indicator

Displays a process value, parameter code, or set value.

OUT1

Is on when comparative output 1 is ON, and off when

(Comparative output 1)

comparative output 1 is OFF.

OUT2

Is on when comparative output 2 is ON, and off when

(Comparative output 2)

comparative output 2 is OFF.

SV

Stays on while a set value is displayed or being changed, and off

(Set value)

at all other times.

Stays on while a set value that can be taught is displayed, and

T

blinks during teaching.

At the calibration level, stays on while a calibration value is

(Teaching)

Operation

displayed, and blinks while the calibration value is read.

Stays off at all other times.

indicator

ZERO

Is on when zero-shifting by forced-zero operation is active.

sections

(Forced-zero)

Turns off when forced-zero operation is canceled.

HOLD

Stays on while the process value is held, and off at all other times.

(Process value hold)

Is on while data reading and writing via communication interface

CMW

are both enabled.

Is off while data writing via communication interface is disabled.

(Communication

Data reading is enabled even if this indicator is off provided that

writing)

the product has the communication function.

If the product has no communication function, this indicator is

always off.

Level indicator

Indicates the current level.

Level key

Use to change one level to another.

Mode key

Use to select a parameter.

Use to check the set value of a parameter or enter the change state

Shift key

when the parameter is displayed.

Use to select the digit that can be changed while shifting the set

value.

Up/Zero key

Use to change the set value in the change state.

Use to execute or cancel the forced-zero operation when a process

value is displayed.

8

1.4 Parts Name and Function

CHAPTER

2INSTALLATION AND CONNECTION

This chapter describes how to install and connect the product before turning the power on.

2.1Installation 10

Dimensions/Panel Cutout Dimensions/

Installation Procedure

2.2I/O Terminal Connections 12

Terminal Arrangement/Terminal Connection

9

INSTALLATION CONNECTION AND

INSTALLATION AND CONNECTION

CHAPTER 2 Installation and Connection

2.1 Installation

Dimensions

Size of characters displayed on the main indicator

8	7mm
3.6mm		44.8

48		3							80

35	24	(36.8)	22
			Units in mm

Panel Cutout Dimensions

Separate mounting (units in mm)

60 min.

min.	45	+0.6
40		-0
		+0.3 -0
		22.2

Gang mounting (units in mm)

(48 x No. of products -2.5)+1-0.0

+0.3 22.2 -0

The products cannot be made waterproof when gang-mounted.

Fit the product into a rectangular panel cutout, put the adapter on the product from the rear end all the way to the panel, and tighten the screws of the adapter to secure the product.

When gang-mounting the products, make sure the ambient temperature of the product falls within the specified limits.

Mount to a panel that is 1 to 5 mm thick. Mounting the product to a thinner panel will reduce the resistance to shock and vibration and may result in a malfunction of the product.

10

2.1 Installation

Installation Procedure

(1)Fit the product into a rectangular panel cutout.

(2)If you want to make the product waterproof, use the watertight packing as shown in the figure below.

Note that the watertight packing is direction-sensitive.

(3) Put the adapter on the product from the rear end all the way to the panel.

(4)Tighten the two screws of the adapter in alternate order to a tightening torque of 0.29 to 0.39 N·m.

11

INSTALLATION CONNECTION AND

CHAPTER 2 Installation and Connection

2.2 I/O Terminal Connections

Terminal Arrangement

INSTALLATION CONNECTIONAND

communication

NC

NC

Without

7

8

OUT1

NC

OUT2

COM

communication

Relay

9

10

11

12

function

output

With

RS485

C

7

8

C

D

function

7

8

9

10

11

12

B (+)

A (-)

OUT1

PASS

OUT2

COM

Current/Voltage

With linear

1

2

3

4

5

6

NPN

9

10

11

12

7

8

tran-

output

B

D output

(+)

(-)

sistor

1

2

3

OUT1

PASS

OUT2

COM

PNP

9

10

11

12

A

tran-

sistor

NPN

output

input

Control voltage

24VDC

Event input or

pulse input

A

1

2

3

4

5

6

B

Analog

COM

PNP

Control

input

Voltage

Current

input

voltage

Analog input

24VDC

Event input or

pulse input

	Terminal No.			Name			Description		Applicable model
	-			Operation power supply			Operation power supply terminals		All models
							Depending on parameter setting:
							• Hold the process value.
				Event input			• Serve as input terminals for the
	-			or			forced-zero or forced-zero		K3GN-ND_-_ 24VDC
				pulse contact/			cancel operation.
				input			• Serve as pulse input terminals
							when the input type is set to
	-						"pulse".		K3GN-PD_-_ 24VDC
	-			Analog input		Voltage/current analog terminals		All models
	-			Communication			RS-485 communication terminals		K3GN-_D_-FLK 24VDC
				Linear current output			Linear current output		K3GN-___-L1 24VDC
				Linear voltage output			Linear voltage output		K3GN-___-L2 24VDC
	11 -12						Provide comparative output.		K3GN-_DC-_ 24VDC
				Comparative output			Provide PASS output in addition
	11 -12						to OUT1/OUT2 (comparative		K3GN-NDT1-_ 24VDC
							output 1/2) when the product is of		K3GN-PDT2-_ 24VDC
							transistor output type.

Terminal Connection

Wire the terminals using M3 crimp contacts of the type shown below.

5.8 mm max

5.8 mm max

12

2.2 I/O Terminal Connections

Power Supply

7 8 9 10 11 12

1

2

3

4

5

6

Connect the following power supply to terminals and . Supply voltage: 24VDC

Operating voltage range: 85 to 110% of the rated voltage Power consumption: 2.5W (at max. load)

Note that, when turned on, the product will require the operation power supply to have more power supply capacity than rated.

If multiple products are used, the power supply must be able to afford to supply power to the products.

Event Input or Pulse Input
7	8		9 10 11 12			Apply the event or pulse signal to terminals				and	if the product is of NPN
1	2	3	4	5	6	input type, or terminals		and	if the product is of PNP input type.
	NPN input					1	2	3	1	2	3
7	8		9 10 11 12
									Control power
1	2	3	4	5	6	Control power
									24VDC
	PNP input					24VDC	Event or
							pulse input			Event or
										pulse input
							NPN input type		PNP input type

The input equipment connected to these terminals must meet the following conditions.

Transistor output	ON residual current:	2.5V max.
	OFF leakage current:	0.1 mA max.
	Current leakage with
	transistor turned ON:	15 mA min.
Relay output	Load current:	5 mA max.

Analog Input
7	8		9 10 11 12			The following table shows the analog ranges and applicable analog input
1	2	3	4	5	6	terminals.
	Current input					Analog range	Positive side	Negative side
7	8		9 10 11 12			4 to 20 mA/0 to 20 mA
1	2	3	4	5	6	1 to 5V/0 to 5V
	Voltage input					±5V
						±10V

The maximum absolute ratings for analog input are as follows.

Be careful that these ratings must not be exceeded even for a moment.

4 to 20 mA/0 to 20 mA:	±30 mA
1 to 5V/0 to 5V:	±13.5V
±5V:	±13.5V
±10V:	±26V

INSTALLATION CONNECTION AND

13

INSTALLATION AND CONNECTION

CHAPTER 2 Installation and Connection

Communication

7	8		9	10 11 12
1	2	3		4	5	6

Connect the communication cable to terminals	and	if using the
communication function.

RS-485 connections can be one-to-one or one-to N. A maximum of 32 units (including the host computer) can be connected in one-to-N systems.

The total length of the communication cables should be up to 500 m.

Use shielded twisted-pair cables (AWG 28 or thicker) as the communication cables.

Be sure to turn ON the terminator switches only in the devices at each end of the transmission line.

RS232C RS232C-RS485 interface convertor

+ -

Terminator 120Ω(1/2Ω)

(

7

8

7

8

7

8

(B) (A)		(B) (A)		(B) (A)

Terminator 120Ω(1/2Ω)

(

K3GN		K3GN		K3GN
(No. 1)		(No. 2)		(No. 31)

Match the communications format of the K3GN and the host computer. If a one-to-N system is being used, be sure that the communications formats of all devices in the system (except individual unit numbers) are the same.

Chapter 7 explains how to set the K3GN communication format. Refer to your computer's manual for details on changing its communications settings.

Comparative Output

7	8		9 10 11 12			Comparative output is produced at terminals				to 12 .
1	2	3	4	5	6	If the product is of relay output type, terminal				is not used.
Transistor output						Loads connected to the product and the power supply for the loads must be rated
7	8		9 10 11 12			as follows.
1	2	3	4	5	6			max.				max.
	Relay output
						Load	Load	30VDC	Load	Load	Load	24VDC
						1A max.	1A max.		50 mA max.	50 mA max.	50 mA max.	PNP

9	10	11	12	9	10	11	12
OUT1	NC	OUT2 COM		OUT1 PASS OUT2 COM
Relay output type					Transistor output type

The connection causes the current to flow in the direction opposite to indicated by the arrows.

Linear Output

7	8		9	10 11 12	Linear currents and voltages are output between terminals 7 to 8. Contact a load
1	2	3		4 5 6	within the specified range.

14

2.2 I/O Terminal Connections

CHAPTER

3APPLICATION EXAMPLES

This chapter shows some examples of product applications.

3.1Monitoring the Remaining Quantity of Soup 16

3.2Monitoring the Load Current of a Motor 18

3.3Monitoring the Quantity of Dust 20

3.4Monitoring the Internal Pressure of a Tank 22

3.5Monitoring the Rotational Speed of a Motor 24

3.6Using the Product as a Digital Indicator for PLC 26

15

APPLICATION EXAMPLES

CHAPTER 3 APPLICATION EXAMPLES

3.1 Monitoring the Remaining Quantity of Soup

Application

APPLICATION EXAMPLES

Ultrasonic sensor	4 to 20mA
E4PA-LS50-M1		K3GN-NDC
60mm ~ 500mm		Comparative output 1
100%	Remaining	(lower-limit action)
60mm	quantity of soup
	Replenish
500mm	Cup (L)
20%	Cup (M)
	Cup (S)

•The remaining quantity of soup is monitored.

•The soup level is measured with an ultrasonic displacement sensor.

•The K3GN indicates the remaining quantity of soup on a percentage basis.

•Four measurements are averaged for stable indication.

•Comparative output 1 is produced as a lower-limit action signal. When the remaining quantity of soup reaches 20% (lower limit), the “Replenish” indicator turns on.

Wiring

Comparative output 1

								COM
			7	8	9	10	11	12
	Ultrasonic displacement				K3GN-NDC
			1	2	3	4	5	6
	sensor
						COM		Current
		Black4 to 20mA
								input
		Brown (+)
		Blue (-)
		Operation			24VDC
		power supply

16

3.1 Monitoring the Remaining Quantity of Soup

Parameter Setting

Operation

Set the parameters of the K3GN as follows.

	Level			Parameter		Set value
				in-t		analg
				range		4-20
				inp.1		4.00
	Initial setting			dsp.1		100
				inp.2		20.00
				dsp.2		0
				dp		,,,,,
				out1.t		lo
	Advanced-function setting			avg		4
	Operation setting			out1		20

Set the analog output characteristic mode of the sensor to “decrease”. For details on sensor setting, refer to the Operation Manual for the sensor.

Remaining quantity of soup

OUT1 lower limit value (20)

Comparative

output 1

•Comparative output 1 turns on when the remaining quantity of soup decreases to 20%.

17

APPLICATION EXAMPLES