Omron K8DT-TH User manual

1
New Product
Temperature Monitoring Relay
K8DT-TH
Ideal to prevent heater overheating.
Self-latching output to contribute to safe
equipment operation.
• Set the temperature with ultra-simple rotary switches.
• Digitally set the temperature to between 0 and 999°C in 1°C increments with one
Relay (K8DT-TH1@@).
(K8DT-TH2@@: Set to between 0 and 1,800°C in 10°C increments.)
• Connect a thermocouple or platinum resistance thermometer.
• Width of 17.5 mm to reduce space required in panels.
• Push-In Plus Terminal that reduce wiring work.
The use of cage clamps enables wiring with bare stranded wires.
Double-insertion holes for crossover wiring (all terminals).
• UL listed for easy shipping to North America.
• Models added with transistor outputs for superior contact reliability.
Ordering Information
Temperature Input Models
*Refer to Setting Ranges on page 3 for the setting ranges.
Options (Order Separately)
Front Cover
For the most recent information on models
that have been certified for safety
standards, refer to your OMRON website.
Refer to Safety Precautions on page 9.
Power supply
voltage Input types Setting units (setting range) Output relays Type Model
24 V AC/DC Thermocouple or
platinum resistance
thermometer
Setting unit: 1°C or 1°F
(0 to 999°C/°F)
Relay: SPDT contact output K8DT-TH1CD
Transistor K8DT-TH1TD
100-240 V AC Relay: SPDT contact output K8DT-TH1CA
Transistor K8DT-TH1TA
24 V AC/DC
Thermocouple Setting unit: 10°C/°F *
Relay: SPDT contact output K8DT-TH2CD
Transistor K8DT-TH2TD
100-240 V AC Relay: SPDT contact output K8DT-TH2CA
Transistor K8DT-TH2TA
Appearance Model
Y92A-D1A

K8DT-TH
2
Ratings and Specifications
Ratings Specifications
*Industrial Electromagnetic Environment (EN/IEC 61326-1, Table 2)
Power supply
voltage
K8DT-TH@@D: 24 VAC 50/60 Hz or 24 VDC
K8DT-TH@@A: 100 to 240 VAC 50/60 Hz
Allowable voltage
range 85% to 110% of power supply voltage
Power
consumption
24 VAC or 24 VDC: 2.1 VA max. or 1.2 W max.
100 to 240 VAC: 3.1 VA max.
Rated insulation
voltage 253 VAC
Sensor
inputs
K8DT-TH1 Thermocouple: K, J, T, E;
Platinum-resistance thermometer: Pt100, Pt1000
K8DT-TH2 Thermocouple: K, J, T, E, B, R, S, PL II
Setting method Set of three rotary DIP switches
Indicators Power (PWR): Green,
Alarm (ALM): Red
Output form Relay Output: SPDT contact
Transistor Output: 1
Output relay
ratings
Rated load
5 A at 250 VAC (Resistive load)
5 A at 30 VDC (Resistive load)
1 A at 250 VAC (Inductive load)
0.2 A at 48 VDC (Inductive load)
Minimum load: 5 VDC, 10 mA (reference values)
Mechanical life: 10 million operations min.
Electrical life: 5 A at 250 VAC or 30 VDC: 50,000
operations
3 A at 250 VAC/30 VDC: 100,000
operations
Transistor output
ratings
Rated voltage: 24 VDC (maximum voltage: 26.4 VDC)
Maximum current: 50 mA DC
Ambient operating
temperature 20 to 60°C (with no condensation or icing)
Storage
temperature 25 to 65°C (with no condensation or icing)
Ambient operating
humidity 25% to 85% RH (with no condensation)
Storage humidity 25% to 85% RH (with no condensation)
Altitude 2,000 m max.
Applicable wires Stranded wires, solid wires, or ferrules
Applicable wire
size 0.25 to 1.5 mm2(AWG24 to AWG16)
Wire insertion force 8 N max. for AWG20 wire
Screwdriver
insertion force 15 N max.
Wire stripping
length 8 mm
Ferrule length 8 mm
Recommended flat-
blade screwdriver
XW4Z-00B (Omron)
SZF 0.4 2.5 (Phoenix Contact)
210-719 (Wago)
SDI 0.4  2.5  75 (Weidmuller)
Current capacity 10 A (per pole)
Number of
insertions 50 times
Case color N1.5
Case material PC, UL 94 V-0
Weight Approx. 100 g
Mounting Mounts to DIN Track, or screw mounting
Dimensions 17.5 90 90 mm (WDH)
Measurement
accuracy
K8DT-TH1@@: ±1% of the setting range or ±4 °C,
whichever is larger.
K8DT-TH2@@: ±1% of the setting range (±1%FS).
Hysteresis width 2°C
Sampling cycle 100 ms
Applicable
standards
Approved
standards
EN 61010-1
Installation environment:
Overvoltage category II, pollution level 2
EMC EN 61326-1 *
Safety
standards
UL 61010-1 (Listing)
Korean Radio Waves Act (Act 10564)
Insulation resistance
20 Mmin.
Between all external terminals and the case
Between all power supply terminals and all input
terminals
Between all power supply terminals and all output
terminals
Between all input terminals and all output
terminals
Dielectric strength
3,000 VAC for 1 min
Between all external terminals and the case
Between all power supply terminals and all input
terminals
Between all power supply terminals and all output
terminals
Between all input terminals and all output
terminals
Impulse withstand
voltage
6 kV (between live terminals and exposed,
non-charged metal parts)
Noise immunity
Square-wave noise of 1 s/100 ns pulse width with
1-ns rise time
100 to 240 VAC: 1,500 V power supply terminal
common/normal mode
24 VAC: 1,500 V power supply terminal common/
normal mode
24 VDC: 480 V power supply terminal common
Vibration resistance Frequency: 10 to 55 Hz, 0.35-mm single amplitude
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes
Degree of protection Terminals: IP20

K8DT-TH
3
Setting Ranges
K8DT-TH1
Centigrade Fahrenheit
K8DT-TH2
Centigrade
Fahrenheit
Temperature Input Range
Input K J T E Pt100 Pt1000
Setting
temperature
range
1000
800
600
400
200
0
999 850 400 600 850 850
???
0000 0 0
Minimum setting
increment 1°C
Input K J T E Pt100 Pt1000
Setting
temperature
range
1000
800
600
400
200
0
999 999 700 999 999 999
???? ?
0000 0 0
Minimum setting
increment 1°F
Input K J T E B R S PL II
Setting
temperature
range
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
700
600
500
400
300
200
100
0
1,800
1,700 1,700
1,300 1,300
850
600
400
100
0000 000
Minimum setting
increment 10°C
Input K J T E B R S PL II
Setting
temperature
range
3,200
3,100
3,000
2,900
2,800
2,700
2,600
2,500
2,400
2,300
2,200
2,100
2,000
1,900
1,800
1,700
1,600
1,500
1,400
1,300
1,200
1,100
1,000
900
800
700
600
500
400
300
200
100
0
3,200
3,000 3,000
2,300 2,300
1,500
1,100
700
300
0000 000
Minimum setting
increment 10°F
K8DT-TH1 °C °F K8DT-TH2 °C °F
Input type Lower
limit
Upper
limit
Lower
limit
Upper
limit Input type Lower limit
Upper
limit
Lower
limit
Upper
limit
K−20 1019 −40 1039 K−20 1320 −40 2340
J−20 870 −40 1039 J−20 870 −40 1540
T−20 420 −40 740 T−20 420 −40 740
E−20 620 −40 1039 E−20 620 −40 1140
Pt100 −20 870 −40 1039 B0 1820 0 3240
Pt1000 −20 870 −40 1039 R−20 1720 −40 3040
--- --- --- --- --- S−20 1720 −40 3040
--- --- --- --- --- PL II −20 1320 −40 2340

K8DT-TH
4
Connections
Terminal Diagram
Note: 1. Do not connect anything to terminals that are shaded in gray.
2. There is no polarity for the DC power supply input.
Timing Charts Functions
SV Protection
This function protects (i.e., prohibits changing) the alarm setting,
operating method, and modes for the Temperature Monitoring Relay
that have been set on the rotary switches and DIP switch.
The protection function is activated by pressing the output latch reset
button on the Temperature Monitoring Relay for at least 5 s. The
power indicator will flash when the protection is activated.
The protection function can be released by pressing the output latch
reset button on the Temperature Monitoring Relay for at least 5 s. The
power indicator will light while the protection is being reset.
(1) Temperature sensor input
TH1 TH2
K8DT-TH1 C A
(1) (2)(3)
B+
BB
AA
B−B+
+
B−
A1
B+
14
A2
A
11
12
B−
DIP SW
Inside
Inside
(2) Output
C: Relay Output T: Transistor Output
14 11
12
14 11
(3) Power supply voltage
A: 100 to 240 VAC D: 24 VAC/VDC
(No polarity)
A1 A2 A1 A2
−
Relay output (normally closed)
(11) to (14)
Relay output (normally open)
(11) to (14)
Temperature alarm or other error
Power supply
Relay output (latched)
(11) to (14)
LATCH_RESET
Temperature alarm or other error
Power supply
PWR_LED
SV Protect Mode
Power supply
ALM_LED
Temperature alarm
Power supply
Other error
Temperature alarm lower limit
(11) to (14)
Temperature alarm upper limit
(11) to (14)
Temperature settings
Note: Other errors: sensor open circuit error, sensor input error,
temperature setting error, and memory error.
0.02 s
2°C (°F)
2°C (°F)
Flashing
Flashing
Note: If LATCH_RESET is enabled, alarm status will be retained even if the power supply is cycled.
To clear the alarm status, press the LATCH_RESET button.
(Default: Latching enabled.)
Temperature Alarm: Hysteresis: 2°C or 2°F
Changing between Normally Open and Normally Closed
Latched Operation:
Relay outputs remain latched even after the alarm or error is reset.
Operation of Indicators

K8DT-TH
5
Nomenclature
Front
Note: Use solid wires, stranded wires, or ferrules to connect to the
terminals.
To maintain the withstand voltage after connecting the
terminals, insert 8 mm of exposed conductor into the terminal.
Temperature Setting Switch
The rotary switches are used to set the alarm value.
Point the arrow to the required number.
Error (ALM indicator: Flashing)
One of the following items 1 to 3 has occurred.
1. The sensor circuit is disconnected or the temperature setting is out
of the specified range.
2. The temperature setting is out of the specified range.
3. There is a problem in the internal circuits.
Corrections
1. Check for incorrect wiring, circuit disconnections, short circuits,
and whether the input type and temperature settings are correct.
2. Disable SV Protect Mode.
3. If the wiring and settings are correct, reset the power supply.
If the Unit resumes normal operation, the problem may have been
caused by noise.
If the Unit does not resume normal operation, it must be replaced.
*Latching and the SV Protect Mode are stored in non-volatile
memory. An error may occur if the data is updated more than one
million times.
*If you press and hold the LATCH_RESET button for 5 seconds or
longer, the SV Protect Mode will go into effect.
When SV Protect Mode is enabled, the PWR indicator flashes.
To disable the SV Protect Mode, press and hold the
LATCH_RESET Button for at least 5 seconds.
Temperature unit
(Black out
the unnecessary label:
°C or °F.)
Temperature setting
switch for increments
of 100°C/°F
Temperature setting
switch for increments
of 10°C/°F
Temperature setting
switch for increments
of 1°C/°F
LATCH_RESET button *
Power indicator
Alarm indicator
Terminal block
(See note.)
Terminal block
(See note.)
Temperature unit
(Black out
the unnecessary label:
°C or °F.)
Temperature setting
switch for increments
of 1,000°C/°F
Temperature setting
switch for increments
of 100°C/°F
Temperature setting
switch for increments
of 10°C/°F
LATCH_RESET button *
Power indicator
Alarm indicator
Terminal block
(See note.)
Terminal block
(See note.)
K8DT-TH1 K8DT-TH2
8 mm 8 mm
Solid Wire
8 mm
Stranded Wires Ferrules

K8DT-TH
6
Operation Method
Connections
Outputs
For a relay output, the SPDT contacts are output on terminals 11, 12, and 14. For a transistor output, the output is on terminals 11 and 14.
The internal circuit of the transistor output is NPN, but application is possible for either a sinking or sourcing output.
DIP Switch Settings
load
K8DT 11
Sinking
In the case of sinking output applications
14
load
K8DT 11
In the case of sourcing output applications
14
Sourcing
O N
1 2 3 4 5 6 7 8
SW3
DIP Switch
SW2
SW1
SW4
SW7
SW6
SW5
SW8
Turn OFF the power to the Temperature Monitoring Relay before
you change the DIP switch settings.
The DIP switch settings take effect when the power is turned ON.
Use a flat-blade screwdriver to set the DIP switch pins.
Note: Open the DIP switch cover to set the DIP switch.
Keep the DIP switch cover closed while the power supply to the Relay is ON.

K8DT-TH
7
DIP Switch Functions
K8DT-TH1
Note: The default setting is 0°C.
Note: All pins are set to OFF by default.
K8DT-TH2
Note: The default setting is 0°C.
Note: All pins are set to OFF by default.
R_SW3 100°C/°F units (0 to 9)
R_SW2 10°C/°F units (0 to 9)
R_SW1 1°C/°F units (0 to 9)
PIN
ON ❍↑
OFF ●↓
Alarm Mode Upper limit ●--- --- --- --- --- ---
Not used.
Lower limit ❍--- --- --- --- --- ---
Latching With latching --- ●--- --- --- --- ---
Without latching --- ❍--- --- --- --- ---
Output drive
method
Normally open --- --- ●--- --- --- ---
Normally closed --- --- ❍--- --- --- ---
Temperature
unit
°C --- --- --- ●--- --- ---
°F --- --- --- ❍--- --- ---
Input type
K--- --- --- --- ●●●
J--- --- --- --- ●●❍
T--- --- --- --- ●❍●
E--- --- --- --- ●❍❍
Pt100 --- --- --- --- ❍●●
Pt1000 --- --- --- --- ❍●❍
NOT USE --- --- --- --- ❍❍●
NOT USE --- --- --- --- ❍❍❍
R_SW3
1,000°C/°F units (0 to 3)
Note: A temperature setting error occurs if this switch
is set to a value from 4 to 9.
R_SW2 100°C/°F units (0 to 9)
R_SW1 10°C/°F units (0 to 9)
PIN
ON ❍↑
OFF ●↓
Alarm Mode Upper limit ●--- --- --- --- --- ---
Not used.
Lower limit ❍--- --- --- --- --- ---
Latching With latching --- ●--- --- --- --- ---
Without latching --- ❍--- --- --- --- ---
Output drive
method
Normally open --- --- ●--- --- --- ---
Normally closed --- --- ❍--- --- --- ---
Temperature
unit
°C --- --- --- ●--- --- ---
°F --- --- --- ❍--- --- ---
Input type
K--- --- --- --- ●●●
J--- --- --- --- ●●❍
T--- --- --- --- ●❍●
E--- --- --- --- ●❍❍
B--- --- --- --- ❍●●
R--- --- --- --- ❍●❍
S--- --- --- --- ❍❍●
PL II --- --- --- --- ❍❍❍
1
ON
OFF
2
3
4
567
8
1
ON
OFF
2
3
4
567
8

K8DT-TH
8
Dimensions (Unit: mm)
Optional Parts for DIN Track Mounting
17.5
90
86
90
5
100
Temperature Monitoring Relay
K8DT-TH
Options (Order Separately)
Front Cover
Y92A-D1A
52.7
3.5
1.8
17.5 5.85
DIN Tracks
PFP-100N
PFP-50N
*Dimensions in parentheses are for the PFP-50N.
4.5
15 25 25
10 10
1000(500)*
25 25 15(5)*
35±0.3
7.3±0.15
27±0.15
1

K8DT-TH
9
Safety Precautions
Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/.
Warning Indications
Meaning of Product Safety Symbols
!CAUTION
Doing so may occasionally result in minor injury due
to electric shock. Do not touch the Relay while the
power supply is ON, except for the adjustment knob
and buttons.
There is a risk of minor electrical shock, fire, or device
failure. Do not allow any pieces of metal, conductors, or
cutting chips that occur during the installation process to
enter the product.
Explosions may cause minor injuries. Do not use the
product in locations with inflammable or explosive
gases.
There is a risk of minor electrical shock, fire, or device
failure. Do not disassemble, modify, repair, or touch
the inside of the product.
If the setting does not match the element to be
controlled, the product may behave unexpectedly and
damage the machine or cause accidents. Set the
Temperature Monitoring Relay as described below.
• Make sure that all parameters are set suitably for the monitor
targets.
• Make sure that the power supply is turned OFF before you change
any DIP switch setting. The DIP switch settings take effect when
the power is turned ON.
If the Relay fails, monitoring and alarm outputs may
fail to operate. This may result in physical damage to
the facilities, equipment, or other devices that are
connected to it. To reduce this risk, inspect the Relay
regularly. To maintain safety in the event of
malfunction of the Relay, take appropriate safety
measures, such as installing a monitoring device on a
separate line.
Use of the product beyond its life may result in
contact welding or burning. Make sure to consider the
actual operating conditions and use the product
within its rated load and electrical life count. The life
of the output relay varies significantly with the switching
capacity and switching conditions.
If the Relay is used with incorrect wiring, fire may
occasionally occur, possibly resulting in physical
damage. Check the wiring for mistakes before you
turn ON the power supply.
If the wire insertion length is insufficient, fire may
occasionally occur, possibly resulting in physical
damage. Insert the wires all the way to the back.
The terminal block may be damaged if you insert a
flat-blade screwdriver in the release hole with
excessive force. Insert the flat-blade screwdriver into
the release holes with a force of 15 N or less.
CAUTION
Indicates a potentially hazardous
situation which, if not avoided, may result
in minor or moderate injury or in property
damage.
Precautions for
Safe Use
Supplementary comments on what to do
or avoid doing, to use the product safely.
Precautions for
Correct Use
Supplementary comments on what to do
or avoid doing, to prevent failure to
operate, malfunction, or undesirable
effects on product performance.
Used to warn of the risk of electric shock under
specific conditions.
Used for general prohibitions for which there is
no specific symbol.
Used to indicate prohibition when there is a risk
of minor injury from electrical shock or other
source if the product is disassembled.
Used for general mandatory action precautions
for which there is no specified symbol.

K8DT-TH
10
1. Do not use or store the product in the following locations.
•Locations subject to water or oil
•Locations subject to direct radiant heating equipment
•Outdoor locations or under direct sunlight
•Locations subject to dust or corrosive gases (sulfurizing gases,
ammonia gases, etc.)
•Locations subject to rapid temperature changes
•Locations prone to icing and dew condensation
•Locations subject to vibration and large shocks
•Locations subject to wind and rain
•Locations subject to direct radiant heating equipment
•Locations subject to static electricity or noise
•Locations subject to insects or small animals
2. Use and store the product in a location where the ambient
temperature and humidity are within the specified ranges. If
applicable, provide forced cooling.
3. Check terminal polarity when wiring and wire all connections
correctly. The power supply terminals do not have polarity.
4. Do not wire the input and output terminals incorrectly.
5. Make sure the power supply voltage and loads are within the
specifications and ratings for the product.
6. Make sure the type of the thermocouple matches the input type
that the Temperature Monitoring Relay is designed for.
7. If you need to extend the length of the lead wires on the
thermocouple, make sure to match the type of thermocouple and
always use compensating conductors.
8. Point the arrows on the rotary switches to the required numbers.
Do not set a switch midway between two positions. Malfunction
could result from an improper setting.
9. To extend the lead wires on the platinum resistance thermometer,
use lead wires with a low resistance (5 Ωor less per wire), and
make the resistance equal on all three lead wires.
10.Make sure the ferrule terminals for wiring are of the specified size.
11. The stripping length is 8 mm. Insert the wires all the way to the back.
12.Do not connect anything to terminals that are not being used.
13.Use a power supply that will reach the rated voltage within 1
second after the power is turned ON.
14.After you turn ON the power, it takes 2 seconds for the outputs of
the Temperature Monitoring Relay to stabilize. Take this time into
account when you design the control panel.
15.Allow at least 30 minutes for the product to warm up. During this
time, the correct temperature will not be detected and the output
may malfunction.
16.Keep wiring separate from high voltages and power lines that draw
large currents. Do not place product wiring in parallel with or in the
same path as high-voltage or high-current lines.
17.Do not install the product near equipment that generates high
frequencies or surges.
18.The product may cause incoming radio wave interference. Do not
use the product near radio wave receivers.
19.Install an external switch or circuit breaker and label it clearly so
that the operator can quickly turn OFF the power supply.
20.When discarding the product, properly dispose of it as industrial
waste.
21.Make sure the indicators operate correctly. Depending on the
application environment, the indicators may deteriorate
prematurely and become difficult to see.
22.The maximum terminal temperature is 80°C. Use wires with a
temperature resistance of at least 80°C.
23.Do not use the product if it is accidentally dropped. The internal
components may be damaged.
24.Be sure you understand the contents of this catalog and handle
the product according to the instructions provided.
25.Do not install the product in any way that would place a load on it.
26.When using the product, remember that the power supply
terminals carry a high voltage.
27.The product must be handled only by trained electrician.
28.Prior to operation, check the wiring before you supply power to the
product.
29.Do not install the product immediately next to heat sources.
30.Perform periodic maintenance.
31.Do not wire anything to the release holes.
32.When you insert a flat-blade screwdriver into a release hole, do not
tilt or twist the screwdriver. The terminal block may be damaged.
33. Insert a flat-blade screwdriver into the release holes at an angle. The
terminal block may be damaged if the screwdriver is inserted straight in.
34.Do not allow the flat-blade screwdriver to fall when you are holding
it in a release hole.
35.Do not bend a wire past its natural bending radius or pull in it with
excessive force. Doing so may break the wires.
36.Do not insert more than one wire into each terminal insertion hole.
37.To prevent wiring materials from smoking or igniting, confirm wire
ratings and use the wiring materials given in the following table.
38.Use only the specified wires for wiring.
39.When wiring the terminals, allow some leeway in the wire length.
Observe the following operating methods to
prevent failure and malfunction.
1. Use the power supply voltage, input power, and other power
supplies and converters with suitable capacities and rated outputs.
2. When cleaning the product, do not use thinners or solvents. Use
commercial alcohol.
3. If you use stranded wires, make sure that there are no loose wire
strands.
4. If you wire crossovers and connect terminal blocks in parallel, a
large current will flow. Make sure that the current does not exceed
10 A.
5. The terminal block may be damaged if the recommended tool is
not used. Use the recommended flat-blade screwdriver to operate
the release holes.
Correct Mounting Direction, Mounting, and
Removing
Mounting to DIN Track
To mount the Relay to a DIN Track, hook the Relay onto the DIN
Track and press the Relay in the direction of the arrow until you hear
it lock into place.
Removing from the DIN Track
To remove the Relay, insert a screwdriver into the hook on the top or
bottom and pull out the hook to release the Relay.
• Leave at least 30 mm of space between the product and other
devices to allow easy installation and removal.
Precautions for Safe Use
Recommended wire Stripping length
(Ferrules not used)
0.25 to 1.5mm2/Equivalent to AWG24 to 16 8 mm
Precautions for Correct Use
(1) (2)
PFP-100N (100 cm)
PFP-50N (50 cm)
Applicable DIN Tracks
30 mm min.

K8DT-TH
11
Screw Mounting
1. Pull out the two hooks on the back of the Relay to the outside until
you hear them click in place.
2. Insert M3 screws into the hook holes and secure the Relay.
Adjusting the Setting Knobs
• Use a flat-blade screwdriver to adjust the setting knobs.
Connecting Wires to the Push-In Plus Terminal Block
Part Names of the Terminal Block
Connecting Wires with Ferrules and Solid Wires
Insert the solid wire or ferrule straight into the terminal block until the
end strikes the terminal block.
If a wire is difficult to connect because it is too thin, use a flat-blade
screwdriver in the same way as when connecting stranded wire.
Connecting Stranded Wires
Use the following procedure to connect the wires to the terminal block.
1. Hold a flat-blade screwdriver at an angle and insert it into the
release hole. The angle should be between 10° and 15°.
If the flat-blade screwdriver is inserted correctly, you will feel the
spring in the release hole respond.
2. With flat-blade screwdriver still inserted into the release hole, insert
the wire into the terminal hole until it strikes the terminal block.
3. Remove the flat-blade screwdriver from the release hole.
Checking Connections
• After the insertion, pull gently on the wire to make sure that it will
not come off and the wire is securely fastened to the terminal block.
• If you use a ferrule with a conductor length of 10 mm, part of the
conductor may be visible after the ferrule is inserted into the
terminal block, but the product insulation distance will still be
satisfied.
Removing Wires from the Push-In Plus Terminal Block
Use the following procedure to remove wires from the terminal block.
The same method is used to remove stranded wires, solid wires, and
ferrules.
1. Hold a flat-blade screwdriver at an angle and insert it into the
release hole.
2. With the flat-blade screwdriver still inserted into the release hole,
remove the wire from the terminal insertion hole.
3. Remove the flat-blade screwdriver from the release hole.
(1)
(1)
(2)
(2)
Two M3 screw holes or
two 3-dia. holes
108
Mounting Hole Dimensions
Note: 1. Pull out the hooks to mount
the Relay with screws.
2. Recommended tightening
torque: 0.5 to 0.6 N·m.
Setting knob
Release hole
Terminal
(Insertion) hole
Release hole
Terminal
(Insertion) hole
<Upper side> <Lower side>
Ferrule
Release hole
Terminal
(Insertion) hole
Ferrule
Release hole
Terminal
(Insertion) hole
<Upper side> <Lower side>
Wire
Flat-blade screwdriver
(1)
(3)
(2)
Wire
Flat-blade screwdriver
(1)
(2)
(3)
10 to 15°
10 to 15°
Flat-blade
screwdriver
Flat-blade
screwdriver
<Upper side> <Lower side>
Wire
Flat-blade screwdriver
(1)
(3)
(2)
Wire
Flat-blade screwdriver
(1)
(2)
(3)
10 to 15°
10 to 15°
Flat-blade
screwdriver
Flat-blade
screwdriver
<Upper side> <Lower side>

K8DT-TH
12
Recommended Ferrules and Tools
Recommended ferrules
Note: 1. Make sure that the outer diameter of the wire coating is
smaller than the inner diameter of the insulation sleeve of
the recommended ferrule.
2. Make sure that the ferrule processing dimensions conform
to the following figures.
Recommended Flat-blade Screwdriver
Use a flat-blade screwdriver to connect and remove wires.
Use the flat-blade screwdriver.
The following table shows manufacturers and models as of 2015/Dec.
*OMRON's exclusive purchase model XW4Z-00B is available to
order as SZF 0-0.4×2.5 (manufactured by Phoenix Contact).
• Refer to the contents of this datasheet for cable selection and other
conditions for compliance with EMC standards.
Precaution on EN Standard Compliance
The K8DT complies with EN 61010-1 when it is built into a panel, but
observe the following handling methods to ensure compliance with
the requirements of this standard.
Wiring
Overvoltage category II
Pollution degree 2
• Open-frame Device
• If basic, double, or reinforced insulation is required, use the basic,
double, or reinforced insulation defined in IEC 60664 that is
suitable for the maximum applied voltage for the clearance, solid
insulation, and other factors.
• There is basic insulation between the power supply terminals and
input terminals.
• There is basic insulation between the power supply terminals and
output terminals.
• There is basic insulation between the input terminals and output
terminals.
• Operating section must have reinforced or double insulation.
• The sides of the case are not isolated.
• Connect the output contacts (contacts with different polarity) so
that they reach the same potential.
Applicable
wire
Ferrule
Conductor
Length
(mm)
Stripping
length
(mm)
(Ferrules
used)
Recommended ferrules
(mm
2
)(AWG)
PhoenixContact
product
Weidmuller
product
Wago product
0.25 24
8 10 AI 0.25-8 H0.25/12
FE-0.25-8N-YE
10 12 AI 0.25-10 --- ---
0.34 22
8 10 AI 0.34-8 H0.34/12
FE-0.34-8N-TQ
10 12 AI 0.34-10 --- ---
0.5 20
8 10 AI 0.5-8 H0.5/14
FE-0.5-8N-WH
10 12 AI 0.5-10 H0.5/16 FE-0.5-10N-WH
0.75 18
8 10 AI 0.75-8 H0.75/14
FE-0.75-8N-GY
10 12 AI 0.75-10 H0.75/16 FE-0.75-10N-GY
1/1.25 18/17
8 10 AI 1-8 H1.0/14 FE-1.0-8N-RD
10 12 AI 1-10 H1.0/16
FE-1.0-10N-RD
1.25/1.5 17/16
8 10 AI 1.5-8 H1.5/14 FE-1.5-8N-BK
10 12 AI 1.5-10 H1.5/16
FE-1.5-10N-BK
Recommended crimp tool
CRIMPFOX6
CRIMPFOX6T-F
CRIMPFOX10S
PZ6 roto Variocrimp4
Model Manufacturer
ESD0.40×2.5 Wera
SZS 0.4×2.5
SZF 0-0.4×2.5 *Phoenix Contact
0.4×2.5×75 302 Wiha
AEF.2.5×75 Facom
210-719 Wago
SDI 0.4×2.5×75 Weidmuller
8 to 10 mm
1.9 mm max. 2.6 mm max.
Side
0.4 mm
2.5 mm dia.
2.5 mm
Front
EN/IEC Standard Compliance
Not isolated
Reinforced insulation
(Double insulation)

Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have
any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing
by Omron). Omron disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE
PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE PRODUCTS WILL
SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the Products
or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at Omron’s election,
to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or replacement thereof) the
non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal to the purchase price
of the non-complying Product; provided that in no event shall Omron be responsible for warranty, repair, indemnity or any other
claims or expenses regarding the Products unless Omron’s analysis confirms that the Products were properly handled, stored,
installed and maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return of any Products by
Buyer must be approved in writing by Omron before shipment. Omron Companies shall not be liable for the suitability or
unsuitability or the results from the use of Products in combination with any electrical or electronic components, circuits, system
assemblies or any other materials or substances or environments. Any advice, recommendations or information given orally or in
writing, are not to be construed as an amendment or addition to the above warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is
not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system,
or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with
respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it
to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice
to change part numbers when published ratings or features are changed, or when significant construction changes are made.
However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be
assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to
confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.

Authorized Distributor:
In the interest of product improvement,
specifications are subject to change without notice.
Cat. No. N209-E1-01 0316(0316)
© OMRON Corporation 2016 All Rights Reserved.
OMRON Corporation Industrial Automation Company
OMRON ELECTRONICS LLC
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Hoffman Estates, IL 60169 U.S.A.
Tel: [phone]/Fax: [phone]
Regional Headquarters
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Tel: [phone]/Fax: [phone]
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Tel: [phone]/Fax: [phone]
CSM_1_5_0317

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