Nagano Keiki KJ16 User manual

User Manual for
KJ16 Intrinsically Safe
Pressure Transmitter
7.5

2 TY-KJ16-001A Rev.2
For Proper and Safe Use
Thank you for purchasing the KJ16 Intrinsically Safe Pressure Transmitter. To use this product
safely and properly, read this user manual carefully. This product is used to measure pressure in
a wide range of industrial processes. Incorrect use of it causes failures, which may result in
damage including faults or accidents.
Keep this manual safely after reading it so that you can always reference it.
■ Definition of safety terms
Safety precautions in this manual are categorized based on the following definition:
Indicates the risk that users may suffer from damage
including death or serious injury, and extremely high
urgency at the time of occurrence of risk.
Indicates the risk that users may suffer from damage
including death or serious injury.
Indicates the risk that users may suffer from minor injury
and the risk that only property damage may be caused.
■ Description of Graphic Symbols
Graphic
symbols
Meaning
●Generally prohibited activities
Indicates prohibited activities in handling the product.
●General instructions
Indicates activities based on instructions that users are forced to
conduct.
●Other information
Indicates precautions, special operating methods, and other
important information.
DANGER
CAUTION
WARNING

3 TY-KJ16-001A Rev.2
■Precautions for Handling Product
●Do not give excessive load, vibration, and shock. Damage to the
product and release of a measured object may be caused, which
results in injury or damage to the surrounding environment.
●Repeated applied pressure should be within the rated pressure
range. Do not apply pressure over the maximum allowable
pressure. Damage to pressure elements may be caused, which
results in injury or damage to the surrounding environment.
●Do not use this product for measured objects corrosive to
materials of wetted parts and gas contact parts.
●This product is explosion-proof.
Do not use, install, store, or perform work that degrades the
explosive-proof performance in the environments listed below.
1) Installation that degrades the explosive-proof performance of
the intrinsically safe circuit
• A place with an ambient temperature of above 60 °C*1
• A place exposed to direct sunlight*1
• A place exposed to water such as rain*2
• A place where atmosphere contains moisture, salt, or
sulfur content*2
2) Wiring that degrades the explosive-proof performance of the
intrinsically safe circuit*3
3) Product inspection in a hazardous area*4
●Do not use non-designated batteries and power supply.
Use of them causes failures, fires, or electric shocks.
●If failures or malfunctions of this product may threaten human
life directly or cause harm to human bodies, do not use the
product.
●Do not modify this product. Disassembly or modification of the
product, or modification to add new functions may cause harm
to human bodies.
●When a measuring object is oxygen, use a degreased product.
General products may have oil remaining inside, which may cause
the risk of ignition or explosion when oil reacts to oxygen.
●Conduct wiring correctly according to the wiring nameplate or
the wiring procedure described in the user's manual. Incorrect
wiring may cause failures or fires.
●Use the product within the operating temperature range.
Otherwise, the product fails or is damaged, which causes injury
or damage to the surrounding environment.
* These precautions are selected from our common safety precautions for all products that correspond to
this product. KJ16-specific precautions are further described in detail in the following sections.
!
WARNING

4 TY-KJ16-001A Rev.2
●Install the product according to the installation procedure
described in the user manual.
●Contact us for repair. Disassembly or modification of the
product on your own may cause failures.
*1 Install this product to avoid direct sunlight. Otherwise, the allowable intrinsically safe temperature of
60°C is exceeded, resulting in degrading the intrinsically safe protective performance.
*2 Install this product to avoid rain and wind, sea breeze, and condensation. Otherwise, the case erodes,
degrading the intrinsically safe protective performance, or moisture in the air enters the case,
degrading the intrinsically safe insulating performance.
*3 For details, see "8. Wiring and Connection".
*4 Only an appearance check is allowed in a hazardous area. Be sure to perform other inspection checks
in a "non-hazardous" area. Also, avoid electrostatic charge. To clean this product, use a water-soaked
soft cloth.
Table of Contents
For Proper and Safe Use............................................................. 2
■Definition of safety terms............................................................................................2
■Description of Graphic Symbols.................................................................................2
■Precautions for Handling Product...............................................................................3
Table of Contents......................................................................... 4
1. Preface...................................................................................... 6
2. Product Overview .................................................................... 6
■2.1 Overview...............................................................................................................6
■2.2 Features................................................................................................................6
■2.3 Operating principle ...............................................................................................6
3. Model Number Structure......................................................... 7
4. Specifications .......................................................................... 8
■4.1 Product specifications...........................................................................................8
■4.2 Intrinsically safe specifications.............................................................................9
5. Dimensions .............................................................................11
■5.1 Standard model..................................................................................................11
■5.2 Threads...............................................................................................................12
■5.3 Diaphragm at the edge.......................................................................................13
!CAUTION

5 TY-KJ16-001A Rev.2
■5.4 Edge Dimensions ...............................................................................................14
■5.5 Diaphragm on the edge type/ connection part dimensions used by user..........15
6. Transportation and Unpacking ............................................. 15
■6.1 Precautions for transportation............................................................................15
■6.2 Precautions for unpacking..................................................................................16
7. Installation and Removal....................................................... 16
■7.1 Transmitter..........................................................................................................16
■7.2 Safety barrier......................................................................................................17
■7.3 Cable...................................................................................................................17
■7.4 Precautions for possible water sprinkling on transmitter (Terminal box type)....18
8. Wiring and Connection.......................................................... 19
■8.1 Terminal box transmission cable (compatible transmission cable)....................19
■8.2 M12 connector transmission cable.....................................................................22
■8.3 System configuration diagram............................................................................23
■8.4 Wiring example...................................................................................................24
■8.5 Intrinsically safe device and safety barrier.........................................................30
■8.6 Wiring of intrinsically safe device and safety barrier..........................................30
9. Operation (Energization)....................................................... 31
10. Measures against Noise...................................................... 31
■10.1 Effects of Noise.................................................................................................31
11. Storage ................................................................................. 32
■11.1 Precautions for storage.....................................................................................32
12. Maintenance......................................................................... 33
■12.1 Periodic inspection ...........................................................................................33
■12.2 Service..............................................................................................................33
13. Product Warranty & Export Administration Regulations ............ 34
■13.1 Product warranty ..............................................................................................34
■13.2 ExportAdministration Regulations...................................................................34
13. Others................................................................................... 34

6 TY-KJ16-001A Rev.2
1. Preface
Check the specifications of the delivered model. An incorrect pressure range, power supply, or
output causes accidents. Be sure to use the model appropriate for specifications in the place
suited for your operating environment, and conduct secure wiring and installation.
2. Product Overview
This chapter describes the product overview, characteristics and operating principle.
■ 2.1 Overview
This is a pressure transmitter using a semiconductor strain gauge for the pressure detection part,
and has an intrinsically safe construction which has passed the type approval in compliance with
the IEC technical standards. It can be used where a combustible gas or the vapor of a flammable
liquid (hereinafter referred to as the “explosive gas”) is present in a plant (such as a
petrochemical factory) in a concentration with a risk of explosion or fire, or where such explosive
gas may exist (hereinafter “hazardous area”). The diaphragm at the edge type can be measured
in a wide range of media by placing a pressure sensor element at the edge of the connection part
that controls the dead volume inside the pressure receiver and liquid pool.
■ 2.2 Features
(1) With an intrinsically safe construction, this product can be used in Zone 0, 1, and 2
hazardous areas where almost all types of explosive gas exist.
(2) Using a semiconductor evaporated type (SS) pressure sensor, which has been
applied in various industrial fields, this product was integrally designed from the
semiconductor strain gauge part to the sensing part and to the pressure connection part
for higher durability and stability.
■ 2.3 Operating principle
This product, installed mainly in a hazardous area such as a factory plant, is equipped with an
intrinsically safe construction to measure and output pressure of 4 to 20 mA DC through a safety
barrier installed in a non-hazardous area. The product converts measured pressure into
distortion with the diaphragm in the pressure receiving part and detects the amount of distortion
with the semiconductor strain gauge deposited onto the diaphragm.A detection circuit has a
full-bridge system where all of four edges of a bridge consist of semiconductor strain gauges.
Electric signals in proportion to distortion can be obtained from this bridge circuit. Electric signals

7 TY-KJ16-001A Rev.2
in proportion to distortion can be obtained from this bridge circuit. Then, the signals are amplified
to constant value at the electric circuit and transmitted as direct current output of 4 to 20 mA DC.
3. Model Number Structure
This chapter describes the model number structure.
K J 1 6 -□□□
< Fig. 3-1 Model Number Structure >
*1 Wetted material used for this type:
“4: Diaphragm (SUS630 (17-4PH)),
Fitting (SUS316)” only
Type:
6: Connector with
2 m shielded cable (standard)
7: Terminal box (small)
9: Terminal box (large)
< Fig. 2-1 Block diagram >
Wetted part materials:
4: Diaphragm (SUS630 (17-4PH))
Fitting (SUS316)
6: Diaphragm (Co-Ni alloy)
Fitting (SUS316)
G: Diaphragm (SUS316L)
Fitting (SUS316L)
Thread:
2: G1/4B 3: G3/8B 4: G1/2B
6: R1/8 (50 MPa range or less only)
7: R1/4 (50 MPa range or less only)
8: R3/8 (50 MPa range or less only)
9: R1/2 (50 MPa range or less only)
F: 9/16-18UNF (equivalent to Autoclave
Engineers F250C)
V: G3/8A (Diaphragm on the edge type *1,
1 to 10MPa are available)
0 V
+24 V
Amplifier circuit
Output circuit

8 TY-KJ16-001A Rev.2
4. Specifications
■ 4.1 Product specifications
Item Specification
Standard
Diaphragm at edge
Pressure range - 0.1 to 0.5, 1, 2 MPa
0 to 0.5, 1, 2, 3.5, 5, 10, 20, 35, 50, 70, 100 MPa
(up to 35 MPa for KJ16-
□□ G) 0 to 1, 2, 3.5, 5, 10 MPa
Max. allowable
pressure *
1
SUS630
Co-Ni alloy
200% of pressure range
(except 35 & 50 MPa (150%) and
70 & 100 MPa (120%)) SUS630 200% of
pressure
range
SUS316L 150% of pressure range
(except 3.5 to 35 MPa (120%))
Accuracy *
2
+/- 0.5%F.S. (at 23 °C) +/- 1.0%F.S. (at 23 °C)
Temp. coefficient
(Zero point/
Span)
SUS630
Co-Ni alloy +/- 0.05%F.S./°C (50 MPa or less)
+/- 0.1%F.S./°C (70 & 100 MPa ranges
)
+/- 0.1%F.S./°C
SUS316L +/- 0.1%F.S./°C
Threads G1/4B, G3/8B, G1/2B
R1/8, R1/4, R3/8, R1/2
(for R-thread: only 50 MPa or less is available)
9/16-18UNF (equivalent to Autoclave Engineers F250C)
G3/8A (Recommended
tightening torque: 30 N∙m)
Wetted materials
Standard
Diaphragm: SUS630 (17-4PH)
Fitting: SUS316 Diaphragm: SUS630
(17-4PH)
Fitting: SUS316
O ring: Rigid NBR
(EPDM, fluorine, and
neoprene are available)
Corrosion
resistance
Diaphragm: SUS316L
Fitting: SUS316L (up to 35 MPa)
High corrosion
resistance
Diaphragm: Co-Ni alloy
Fitting: SUS316
Measuring fluid Gas or liquid (which does not erode wetted materials)
Power supply voltage 24 V DC -/+ 10%
Output 4 to 20 mA DC (2-wire system)
Load resistance 500 Ω max.
275 Ω max. (when a recommended Zener barrier is used) *
3
Case material ADC12 (aluminum alloy)
Protection class Equivalent to IP65
Type Connector, Terminal box (large or small)
Operating temp./
humidity −10 to 60 °C, 35 to 85 %RH (non-freezing, non-condensing)
Storage temp./
humidity −20 to 70 °C, 35 to 85%RH (non-freezing, non-condensing)
Insulation resistance 50V DC, 100 MΩ or more
Applicable standards RoHS Directive compliance: Yes
EMC applicable standards: EN61326/1997, A1/1998, A2/2001, A3/2003
Weight Connector type: approx. 170g (excluding cable)
Terminal box type (large): approx. 410 g, Terminal box type (small): approx. 300 g

9 TY-KJ16-001A Rev.2
*1 Max. allowable pressure is the upper limit of pressure value which may safely be applied to the product and
remain in specification once pressure is returned to the rated range with a couple of times overpressurization
for about 10 minutes.
*2 Accuracy includes linearity, hysteresis, and repeatability.
*3 When using the recommended Zener barrier (MTL7787+), the load resistance connectable by the user is
275 Ω max. (including the line resistance of cables, etc).
■ 4.2 Intrinsically safe specifications
4.2.1 KJ16
Type approval No.
Intrinsically safe product certified by the Technology Institution of
Industrial Safety
Type approval No.
Pressure range
TC17811
0 to 0.5, 1, 2 MPa
- 0.1 to 0.5, 1, 2 MPa
T TC17810
0 to 3.5, 5, 10, 20, 35, 50, 70, 100 MPa
Explosion-proof
construction
Safety barrier ratings
Allowable voltage of intrinsically safe circuit (Ui): 28 V
Allowable current of intrinsically safe circuit (li): 93 mA
Allowable power of intrinsically safe circuit (Pi): 651 mW
Internal inductance of intrinsically safe circuit (Li): 10 μH
Internal capacitance of intrinsically safe circuit (Ci): 0.065 μF
Ambient temperature: 60 C
External transmission cable
Allowable inductance: 2.5 mH, Allowable capacitance: 0.015 μF
(The values vary depending on your safety barrier.)
Withstanding voltage
500 VAC, 1 minute
4.2.2 Insulating barrier (Non-hazardous area)
Specifications of a recommended insulating barrier (safety barrier) paired with the KJ16 pressure
transmitter are shown in the table below.An insulating barrier does not need to be grounded as
defined in the intrinsically safe standards as it is isolated from the intrinsically safe circuit.
Temperature class
Gas group
Type of explosion-proof construction
according to technical standards (by TIIS)
Exia
II C
T5
<Table 4-2>
< Table 4-1 >

10 TY-KJ16-001A Rev.2
Manufacturer P&F Co., Ltd. Cooper Industries
Japan K.K. IDEC CORPORATION
Model KFD2-STC4-Ex1 MTL5541 D5014S, D5014D
Type approval No. TC16232 TC19435 TC21005
Explosion-proof construction
Exia II C
Exia II C
Exia II C
Safety barrier rating
Intrinsically safe circuit
maximum voltage (Uo) 25.4 V 28 V 25.9 V
Intrinsically safe circuit
maximum current (lo) 86.8 mA 93 mA 92 mA
Intrinsically safe circuit
maximum power (Po) 551 mW 0.65 W 594 mW
Intrinsically safe circuit
allowable inductance (Lo) 4.6 mH 4.2 mH 3.0 mH
Intrinsically safe circuit
allowable capacitance (Co) 0.093 μF 0.083 μF 0.100 μF
Ambient temperature 60 °C 60 °C 70 °C
Load resistance in a safe area 800 Ω max.
(20 mADC) 450 Ω max. (20 mADC) 550 Ω max. (20 mADC)
* Choice of safety barriers available.
4.2.3 Zener barrier (Non-hazardous area)
The specifications of a recommended Zener barrier (safety barrier) paired with the intrinsically
safe KJ16 pressure transmitter are shown in the table below:
Manufacturer Cooper Industries Japan K.K.
Model MTL7787+
Type approval No. TC16447
Explosion-proof construction Exia II C
Safety barrier rating
Intrinsically safe circuit maximum voltage (Uo) 28 V
Intrinsically safe circuit maximum current (lo) 93 mA
Intrinsically safe circuit maximum power (Po) 0.65 W
Intrinsically safe circuit allowable inductance (Lo) 3.05 mH
Intrinsically safe circuit allowable capacitance (Co) 0.083 μF
Ambient temperature 60 °C
Load resistance in a safe area 275 Ω max. (20 mA DC)
* Choice of safety barriers available.
●When Zener barrier is used, Class A grounding with an
intrinsically safe stipulation is required for installation.
<Table 4-4>
!
CAUTION
<Table 4-3>

11 TY-KJ16-001A Rev.2
5. Dimensions
■ 5.1 Standard model
HEX
< Fig. 5-1 KJ16-9□□ (Terminal box (large)) >
Terminal layout
Ground
Power (+)
Power (-)
A (red): power (+)
C (white): power (
-)
E (shield): earth
φ6.2 Shielded cable
HEX.
Cable length: 2m (Standard)
< Fig. 5-2 KJ16-6□□ (Connector type) >
*1 Screws on the side
are for fixing the case.
Do not use them for
earth connection.
*1

12 TY-KJ16-001A Rev.2
■5.2 Threads
t
*2 SUS316L fitting material is
engraved with “LC” at the hexagon
part of the fitting
.
HEX.
< Fig. 5-3 KJ16-7□□ (Terminal box (small)) >
*2
< Fig. 5-6 9/16-18UNF
(equivalent to Autoclave Engineers >
Terminal layout
Ground
Power (+)
Power (-)
*1
*1 Screws on the side are for fixing
the case. Do not use them for
earth connection.
< Fig. 5-4 Parallel thread >
< Fig. 5-5 Taper thread >
KJ16-□2□KJ16-□3□KJ16-□4□
(G1/4B) (G3/8B) (G1/2B)
a: 16 a: 18 a: 20
h: 115 h: 117 h: 119
a:16 a: 18 a: 20
h: 168 h: 170 h: 172
a: 16 a: 18 a: 20
h: 187 h: 189 h: 191
KJ16-7□□
KJ16-9□□
KJ16-6□□
KJ16-□6□KJ16-□7□KJ16-□8□KJ16-□9□
(R1/8) (R1/4) (R3/8) (R1/2)
b: 14 b: 16 b: 18 b: 20
h: 110 h: 112 h: 114 h: 116
b: 14 b: 16 b: 18 b: 20
h: 163 h: 165 h: 167 h: 169
b: 14 b: 16 b: 18 b: 20
h: 182 h: 184 h: 186 h: 188
KJ16-6□□
KJ16-7□□
KJ16-9□□
KJ16-□F□
(9/16-18UNF)
KJ16-6□□ h: 100
KJ16-7□□ h: 153
KJ16-9□□ h: 172

13 TY-KJ16-001A Rev.2
■ 5.3 Diaphragm at the edge
HEX.
O ring (P14)
< Fig. 5-7 KJ16-9V4 (Terminal box (large))
< Fig. 5-8 KJ16-6V4 (Connector type) >
Terminal layout
Ground
Power (+)
Power (-)
A (red): power (+)
C (white): power (
-)
E (shield): earth
φ6.2 Shielded cable
Cable length: 2m (Standard)
HEX.
O ring (P14)
*1 Screws on the side are for fixing
the case. Do not use them for
earth connection.
*1

14 TY-KJ16-001A Rev.2
■5.4 Edge Dimensions
< Fig. 5-9 KJ16-7V4 Terminal box (small) >
HEX.
O ring (P14)
Power (+)
Terminal layout
Ground
Power (-)
*1
*1 Screws on the side are for fixing
the case. Do not use them for
earth connection.
< Fig. 5-10 (1 to 2 MPa pressure range) > < Fig. 5-11 (3.5 to 10 MPa pressure range) >

15 TY-KJ16-001A Rev.2
■ 5.5 Diaphragm on the edge type/ connection part dimensions used by user
Shape and dimensions of the fitting end of parallel thread type and mating port
(Table 7,Appendix 1 of JIS B 2351-1 (excerpt))
Nominal
thread
diameter G d2 +/- 0.3 d3+0.1
0 L3(Min.) L4(Max.) L5(Min.) L6+0.4 0 Nominal number of
o-ring applied
3/8 28 18.6 12 2 18 2.5 P14
Thread G shall be ClassA parallel piping thread for JIS B 0202.
The O-ring contact surface shall not have scratches in the axial direction or spiral tool marks.
The d2counterbore surface shall be flat and at right angles to the thread axis line.
6. Transportation and Unpacking
This chapter describes the precautions for transportation and unpacking of the product.
■ 6.1 Precautions for transportation
(1) Do not apply vibration as much as possible in transporting the product, as is the case with
other electric meters.
(2) Never hit or drop the product.
●Do not drop this product or give a shock to it.
Otherwise, the product may become completely inoperable.
!
CAUTION
< Fig. 5-12 > < Fig. 5-13 Enlarged view “A” >
O-ring
contact surface

16 TY-KJ16-001A Rev.2
■ 6.2 Precautions for unpacking
(1) Check the appearance of a carton before unpacking it.
(2) Be careful not to handle the carton roughly when unpacking it.
(3) Unpack the carton and remove the product from the carton in a sufficiently wide place to
avoid the product from being accidentally dropped.
(4) After unpacking, check that no flaws are found in the appearance of the product. Check
that your ordered model number and range are described on the nameplate label on the
product.
In case of any anomaly, contact the sales agent or our sales office.
7. Installation and Removal
■ 7.1 Transmitter
(1) Do not tighten the main case body with a pipe wrench in connecting to a pressure line. Be
sure to use the hex parts of the threads for installation of the product. Tightening torque
recommended for the diaphragm at the edge type is 30 N･m.
(2) Do not install the product in the pressure line in the state where piping is filled with liquid.
When you tighten the threads, high pressure is produced because liquid is
incompressible, which causes equipment to fail. When installing the transmitter to the
existing pressure line or replacing the transmitter with a new one, remove liquid on a
piping connection side, leave an air of approximately 15 to 20 mm, and tuck the threads
to install the product.
(3) The product has excellent earthquake resistance. However, it is a measuring
instrument, so do not apply violent vibration.
(4) The product can be installed in a vertical or horizontal position in forward/backward and
right/left directions.
(5) This product is in a protection class equivalent to IP 65 (JIS C 0920). However, select an
installation place that is not exposed to direct sunlight, moisture, dust, oil or water for a
longer life.
●Do not give excessive shock such as hitting or dropping the
product during installation of piping.
●Do not put a piece of wire into a pressure inlet.
The diaphragm is damaged, which causes incorrect behavior.
●Terminal box type should be oriented such that gland points
upward to prevent water from entering through the cable.
!
CAUTION

17 TY-KJ16-001A Rev.2
●Never pull the cable or bend it extremely. Great care should be
taken to conduct wiring so that the self-weight of the cable is
not applied to the product.
●Secure a space for maintenance activities.
●Wrap the tapered male thread of the pipe with the sealing tape
to make sure there is no leak.
●When using parallel piping threads for pipes, check that there
is no dirt, dust, or scratches on the packing and sealing
surfaces to make sure there is no leak.
●If there is a risk of surge pressure, use joint with throttle, and
dampener.
●Provide an earth ground through the piping, since it is required
to obtain an earth ground from the KJ16 main unit (fitting part).
In the case where an earth ground at the pipe is unavailable,
use the earth terminal of this product (connector: shielded wire
of the cable; terminal box: earth terminal No. 3 of the terminal
block) to obtain an earth ground.
Be careful not to make a 2-point grounding that may cause a
potential difference when both the KJ16 main unit and the earth
terminal are grounded (The ground should basically be single
point).
●If the temperature of the measured medium exceeds the
operating temperature range, take heat release measures to
alleviate the influence of temperature on the medium. The
measures include: using cooling device or installation of pipe
siphon before introducing the medium to the KJ16 body
directly.
If the temperature of the measured medium is lower than the
ambient temperature (when there is a temperature difference
from the body), proceed with dew condensation preventions,
such as extending the piping to raise the temperature of the
medium to the level of the ambient temperature of the main
unit.
■ 7.2 Safety barrier
For details, see the user manual of the safety barrier you purchased.
■ 7.3 Cable
You can select any cable for connection in a hazardous area, but it must meet the ratings shown
on the barrier and the requirements specified in the user manual. Inductance and capacitance
(Lo / Co) in particular must be strictly observed. If the cable capacitance or inductance value
determined based on the cable size and cable length exceeds the rating of the barrier, the
intrinsically safe construction certification will be invalid.

18 TY-KJ16-001A Rev.2
■ 7.4 Precautions for possible water sprinkling on transmitter
(Terminal box type)
●Install the product with a gland part (cable outlet) established
in an underside direction (recommended) to prevent the
intrusion of water from the gland part, as shown in Fig. 7-1
below. Tighten the gland part to prevent water from entering.
(Refer to “8.1 Terminal box transmission cable (compatible
transmission cable)”.)
Lower the cable in the downward direction once as shown in
Fig. 7-1, and rotate a couple of times for wiring in the direction
of the top to prevent water from entering inside the cable.
Install the cable in such a way as to prevent water from
collecting inside. (Lower the cable once in the lower direction
regardless of the mounting direction.) Do the same for
installation of electrical conduit to prevent water from
entering.
●Atmospheric pressure is introduced into an instrument via the
cable. If the cable is pressed due to a clamp, bush, or extreme
bend in the middle of the cable, or if the cable is long, the
exhaustion of pressure takes time.
In this case, an output error may be caused because of
pressure within the case or a change in temperature. Conduct
wiring not to seal the cable end with tape or adhesive.
●Make sure to select and use a cable with an appropriate outer
diameter according to the size of the gland, for transmission
between the terminal box type and the safety barrier.
Using a cable conforming to the gland ensures waterproof
performance (equivalent to IPX 5 (anti-jet type)). Pay careful
attention not to over-tighten the lid of the terminal box or
attach the cable to the wiring introduction section. This will
affect the waterproofing performance.
In addition, when using glands supplied or cable conduits
available in the market instead of supplied gland parts, make
sure to check the waterproof performance.
●Waterproofing performance equivalent to IPX 5 is guaranteed
only when all parts are correctly installed. Please check that
waterproofing has been performed sufficiently.
*1 IPX5 (Regulation over protection against jet water): Water flow discharged at 12.5 L/min from a water
discharge nozzle of φ 6.3 is sprinkled in every direction (from a distance of 2.5 m to 3 m) to a surface
area of 1 m2 for 1 minute, 3 minutes or longer in total, to make sure that no water leaks in (no harm).
!
CAUTION

19 TY-KJ16-001A Rev.2
8. Wiring and Connection
■ 8.1 Terminal box transmission cable (compatible transmission cable)
The transmission cable used between the terminal box cable gland and the safety barrier is a
2-core shielded wire. Choose one for which the following conditions apply:
1) The cable outer diameter is compatible with a terminal box cable gland (terminal box (small):
JIS F8801 10a, 10b / terminal box (large): JIS F8801 15a, 15b or 15c), and the cross section
area of core fits internal terminal block. Use a cable suitable for the withstand voltage
between the conductors (core wires) of the cable, and between the conductor and the ground.
Model No. Terminal size Gasket inner dia.
(mm)
Applicable
cable dia.
(mm)
Core cross
section
(mm2)
Withstand voltage
AC (V)/min.
(bet. conductor &
ground)
KJ16-7
Terminal
box (small) G3/8 10a
(standard) φ7 φ6 to 7
0.25 to 1.65
500
10b φ8 φ7 to 8
KJ16-9
Terminal
box (large) G1/2
15a φ9 φ8 to 9
500
15b
(standard) φ10 φ9 to 10
15c φ11 φ10 to 11
(Cable outlet)
Gland
Cable
Upward
Downward
<Fig. 7-1 Installation direction recommended for possible water sprinkling >
<Table 8-1>

20 TY-KJ16-001A Rev.2
2) The following values must be used for the allowable parameters (See "4.2 Intrinsically Safe
Specifications") defined as the external wire of the intrinsically safe circuit.
3) Before connecting to the KJ16 main unit, the cable tip needs to be processed as shown in
Fig. 8-1 below: strip off the cable sheath (60 mm for terminal box (small), 80 mm for terminal
box (large)), and strip off core coating to suit the M4 crimp terminal.Use crimp terminal
R1.25-4 or equivalent (JIS C 2805) for M4.
●Be sure to install the compatible crimp terminal in the core.
●Atmospheric pressure is introduced into an instrument via the
cable. If the cable is pressed due to a clamp, bush, or extreme
bend in the middle of the cable, or if the cable is long, the
exhaustion of pressure takes time. In this case, an output error
may be caused because of pressure within the case or a change
in temperature. Conduct wiring not to seal the end of the cable
with taping and adhesive.
*1 If insulating barrier is used, provide an earth ground through the piping, since it is required to obtain
an earth ground from the KJ16 main unit (fitting part). In the unlikely event that earth grounding from
the piping is impossible, use the shielded wire to make an earth ground. However, if both the KJ16
main unit and the shielded wire are grounded, make a 1-point grounding so as not to generate a
potential difference.
4) Open the lid of the terminal box and insert the cable from the terminal opening all the way to
the gasket (see Fig. 8-2 below).
5) Tighten the gland and seal the terminal (see Fig. 8-2 below).
*1
<Fig. 8-1>
*1 Shielded wire
CAUTION
!
Allowable capacitance
Allowable inductance
(μF) (mH)
0.015 2.5