Omron S8T-DCBU-02 User manual

Buffer Block S8T-DCBU-02 1
Buffer Block
S8T-DCBU-02
Prevents Equipment Stoppage, Data Loss,
and Other Problems Resulting from
Momentary Power Failures
• Provides a backup time of 500 ms at an output current of 2.5 A.
• Can be wired to the 24-V output from the S8VS, S82J, S82K,
and S8PS Power Supplies.
• Connects to an S8TS Power Supply via an S8T-BUS03 Bus
Line Connector.
• Parallel connections to up to four Blocks can be used to
increase the backup time and current capacities.
• Complies with SEMI F47-0200 standard.
S8T-DCBU-02
S8TS
Ordering Information
■Buffer Block
■Options (Order Separately)
Bus Line Connector (Connects to Buffer Block)
Note: One package contains 10 S8T-BUS03 Connectors.
Basic Configuration
Connection using Bus Line Connector Connection via Wiring
Input voltage Output voltage
(during backup operation) Output current Model number
24 VDC (24 to 28 VDC) 22.5 V 2.5 A S8T-DCBU-02
Type Number of Connectors Model number
DC bus line 1 Connector S8T-BUS03
10 Connectors (See note.) S8T-BUS13
S8
T-D
C
B
U
-
02
S8
T-B
US03
Bus Line
C
onnector
(Order separatel
y
.
)
S8
T
S
-
060
2
4
@
(Order separatel
y
.
)
Load
Connect to AC lines.
Load
Connect to AC lines.

2Buffer Block S8T-DCBU-02
Specifications
■Ratings/Characteristics
Note: 1. The output characteristics are specified at the power output terminals.
2. Refer to Backup Time on page 10 for details.
3. Refer to Functions on page 7 for details.
4. If the number of S8T-DCBU-02 Buffer Blocks to be connected is “N,” set the detection current to 20 mA ×N.
5. Specified by S8TS-06024@connection.
6. Be sure to mount an End Plate (PFP-M: Order separately) on each end of the Buffer Block. Refer to DIN Tracks on page 14.
7. To comply with UL508 (Class 2: Per UL1310), connect one S8TS-06024@to one S8T-DCBU-02 Buffer Block.
■Reference Value
Item Model S8T-DCBU-02
Input Voltage 24 to 28 VDC
Current Charging 0.4 A
Standby 0.18 A
Output
(See note 1.) Backup operation Output voltage For 24 V: 22.5 V typ., 22.0 V min. For 28 V: 26.4 V typ., 25.8 V min.
Output current 2.5 A
Backup time
(See note 2.) Time required until the voltage drops from the fully charged level down to 21.6 VDC
1,000 ms min. (for an output current of 1.2 A)
500 ms min. (for an output current of 2.5 A)
Additional
functions Output functions
(See note 3.)
READY indicator Yes (color: green)
READY output Yes (relay: 24 VDC, 0.1 A max.)
Backup indictor Yes (color: red)
Backup output Yes (relay: 24 VDC, 0.1 A max.)
Overcurrent protection Reverse-L dropping, automatic recovery, overcurrent detection point: 5.8 to 6.8 A
Overvoltage protection Yes
Parallel operation Possible (4 Blocks max.)
Series operation Not possible
Other Ambient operating temperature Refer to the derating curve in Engineering Data. (with no condensation or icing)
Storage temperature −25 to 65°C
Ambient humidity Operating: 25% to 85%; Storage: 25% to 90%
Dielectric strength (See note 4.) 1.0 kVAC for 1 minute (between all DC connection terminals and GR terminals; Detection
current: 20 mA)
500 VAC for 1 minute (between all DC connection terminals/GR terminals and all signal
output terminals; detection current: 20 mA)
Insulation resistance 100 MΩmin. (between all DC connection terminals and GR terminals) at 500 VDC
Vibration resistance (See notes 5 and 6.) 10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z directions
Shock resistance (See notes 5 and 6.) 150 m/s2, 3 times each in ±X, ±Y, and ±Z directions
EMI Radiated Emissions Based on EN55011 Class B.
EMS Conforms to EN61000-6-2
Approved standards UL: UL508 (Listing, Class 2: Per UL1310) (See note 7.),
UL60950, UL1604 (Class I/Division 2)
cUL: CSA C22.2 No.14, No.60950, No.213 (Class I/Division 2)
EN/VDE: EN50178 (=VDE0160), EN60950 (VDE0806)
SEMI standard SEMI F47-0200
Weight 450 g max.
Item Value Definition
Reliability
(MTBF) 135,000hrs min. MTBF stands for Mean Time Between Failures, which is calculated according to
the probability of accidental device fail-
ures, and indicates reliability of devices.
Therefore, it does not necessarily repre-
sent a life of the product.
Life
expectancy 10 yrs. min. The life expectancy indicates average op- erating hours under the ambient tempera-
ture of 40°C and a load rate of 50%.
Normally this is determined by the life ex-
pectancy of the built-in aluminum electro-
lytic capacitor.

Buffer Block S8T-DCBU-02 3
Connections
■Block Diagram
S8T-DCBU-02
Operation
■Application
Connectable Power Supplies
The following Power Supplies (SELV Power Supplies) can be con-
nected. When connected to the following Power Supplies, the Buffer
Block will function properly against a momentary power failure of at
least 300 ms. (See note 1.)
S8TS Series: S8TS-06024@
S8VS Series: S8VS-06024@, S8VS-09024@@, S8VS-12024@@,
S8VS-18024@@, and S8VS-24024@@
S82K Series: S82K-03024, S82K-05024, S82K-@09024,
S82K-@10024, and S82K-@24024@
S82J Series: S82J-02524@@, S82J-05024@@,
S82J-10024@@ (See note 2.), S82J-15024@@,
S82J-30024@, and S82J-60024@
S8PS Series: S8PS-05024@@ (See note 2.),
S8PS-10024@@ (See note 2.), S8PS-15024@@,
and S8PS-30024@@
Note: 1. The backup current must be less than 5 A (parallel operation
connection is required if the backup current exceeds 2.5 A)
and the Buffer Block must be fully charged. If three or more
S8T-DCBU-02 Buffer Block are used in parallel operation
and the backup current exceeds 5 A, the momentary power
failure time that can be compensated for will be reduced.
2. When connected to the S82J-10024@@, S8PS-05024@@,
or S8PS-10024@@ Power Supply, the output voltage may
increase by approximately 4 V for approximately 10 to
50 ms after recovery from the momentary power failure. If
any adverse effect is foreseen, connect a diode as shown
below based on the guidelines given below.
Guidelines for Selecting Diode
Type: Schottky barrier diode
Withstanding voltage (VRRM): At least twice the rated output voltage
Forward current (IF): At least twice the rated output current
Electrolytic capacitor Discharging circuit
+
−
BACKUP output
Drive circuit
READY output
+V
−V
DC input/output
DC (+)
DC (−)
Connected to
Bus Line
Connector
Reverse
connection
protection Charging
circuit
Charging
control
circuit
Voltage
detection 1
Voltage
detection 2
Drive circuit
Discharg-
ing con-
trol circuit
Overvoltage
detection
Overcurrent
detection
Voltage
detection
Reverse flow
prevention diode
Reverse
connec-
tion pro-
tection
Detection
resistor
Voltage
detection
BACKUP
status
detection
Voltage
detection
Voltage
detection
Connected
to Bus Line
Connector
AC input
I/O terminal voltage 4 V
S8T-DCBU-02
Power Supply
Diode
−+

4Buffer Block S8T-DCBU-02
Power Supply To Be Connected
The power consumption of the S8T-DCBU-02 is approximately 10 W,
so make sure that the output capacity of the power supply is suffi-
cient.
If the S8T-DCBU-02 is connected to a previously installed power sup-
ply, the voltage may drop due to the power supply's overcurrent pro-
tection, or backup operations may not be possible.
Note: Connect a power supply within the specified derating range,
considering the power consumption of the S8T-DCBU-02.
Selecting the Power Supply
Determining the Output Capacity
1. Checking Capacities of Devices To Be Connected
Check the capacities (W) of the devices to be connected.
2. Calculating the Total Capacity (Including That of the
S8T-DCBU-02 Buffer Block)
The S8T-DCBU-02 Buffer Block will consume the following power.
Add this to the above capacities (W) to obtain the total capacity.
Vin = 24 V: 9.6 W max. (during charging)
Vin = 28 V: 11.2 W max. (during charging)
3. Calculating the Required Output Capacity
Determine the rate of allowance and apply this allowance rate to
the total capacity calculated above to obtain the output capacity
required by the Power Supply. Be sure to provide a sufficient
allowance rate.
Example: Output voltage: 24 V
Capacities of devices: 36 W (output current: 1.5 A)
Allowance factor: 0.8
Required output capacity of the Power Supply > (36 W
+ 9.6 W) ÷0.8 = 57 W
Therefore, an S8TS-06024@Power Supply,
S8VS-06024@Power Supply, or a Power Supply with a
larger capacity is required.
Selecting the Power Supply
1. Checking the Output Hold Time and Restart Time of
the Power Supply
The relation between the momentary power failure time and the
backup time required to compensate the failure is shown in the
following illustration. As shown by the illustration, the backup time
required from the S8T-DCBU-02 Buffer Block depends on the
connected Power Supply even for the same momentary power
failure time.
Relation between Momentary Power Failure and Backup
Time
The output hold time and restart time of each Power Supply are
shown in Power Supply Output Hold Times (Reference Values) on
page 12 and Power Supply Restart Times (Reference Values) on
page 13.
Example: S8T-DCBU-02: 1 Unit
Connected power supply: S8TS-06024@Power Supply
Load current: 1 A
AC current input voltage: 200 VAC
Momentary power failure time: 300 ms
Required backup time > 300 ms + 270 ms - 100 ms =
470 ms
Refer to the graphs under Backup Time on page 10 to
check whether the backup time is sufficient.
2. Selecting the Power Supply
After obtaining the output capacity required for the Power Supply
and checking its output hold time and restart time as described
above, select an appropriate Power Supply from the list under
Connectable Power Supplies on page 3.
Calculate the total of these capacities.
Calculate the required capacity.
Determining the Output Capacity
Select an appropriate Power Supply.
Check the derating curve.
Selecting the Power Supply
Check capacities of devices to be
connected.
Check the output hold time and restart
time.
+=
Calculation of the Total Capacity
Total
capacity
(W)
Capacities
of devices
(W)
Power consump-
tion (W) of the
S8T-DCBU-02
÷>
Calculation of the Total Power Supply Capacity
Required
output capacity
(W) of the
Power Supply
Total
capacity
(W)
Allow-
ance
factor
+−>
Calculation of the Required Backup Time
Required
backup time
Momen-
tary pow-
er failure
time
Restart time
of Power
Supply
Output hold
time of Power
Supply
AC input
I/O terminal voltage
Backup time
Momentary power
failure time
Output hold time of
Power Supply Restart time of
Power Supply

Buffer Block S8T-DCBU-02 5
3. Checking the Derating Curve
Confirm that the total output capacity calculated in step 2, Calcu-
lating the Total Capacity, under Determining the Output Capacity
is within the derating curve of the Power Supply. If the capacity
exceeds the derating curve, increase the Power Supply capacity
or use forced air cooling to reduce the ambient operating temper-
ature.
Mounting
Mounting Direction
Use standard mounting only. Improper mounting will interfere with
heat dissipation and may occasionally result in deterioration of or
damage to internal parts.
Connecting to the S8TS-06024@
When connecting one or more S8T-DCBU-02 Blocks to the
S8TS-06024@using Bus Line Connectors, connect them to either
the left or right end of the Blocks. Heat dissipation will be interfered
with if the S8T-DCBU-02 Blocks are not connected to the end.
Wiring Connections
A load can be connected to either the power supply side or the
S8T-DCBU-02 side.
Note: Use the largest wire size possible and keep the wiring distance
as short as possible. If the voltage drop caused by the wiring
material is too large, the backup operation may not be suffi-
cient.
Input Voltage
Input voltage range: 24 to 28 VDC
Confirm that an input voltage of at least 24 V is being supplied to the
S8T-DCBU-02 input terminals.
Output Voltage
The output voltage for the backup operation is automatically adjusted
internally by detecting the input voltage. The backup operation is
started when the input voltage drops 2 V.
Note: The output voltage during the backup operation is a maximum
of 2 V lower than the voltage input at an input voltage of 24 V.
Serial Connection
Two Blocks cannot be connected in series to increase the output volt-
age to 48 V or to create positive and negative outputs.
Parallel Operation Connection
The output current and backup time for the backup operation can be
increased by connecting Blocks in parallel.
Standard number of Blocks for parallel operation: 2
Maximum number of Blocks for parallel operation: 4
The backup time will be greatly reduced if three or more Blocks are
connected in parallel and the output current for the backup operation
exceeds 5 A. Refer to Backup Time on page 10 for details on the
backup time during parallel operation.
Note: Although the number of Blocks that canbe connected when us-
ing the S8TS-06024@is five when calculated from the current
capacity of the Bus Line Connector, only a maximum of four
S8T-DCBU-02 can actually be connected in parallel.
Using the Bus Line Connector
When connecting to the S8TS-06024@, always use the S8T-BUS03
Bus Line Connector. This Connector connects only the DC lines. It
does not connect AC lines.
S8T-BUS03 Bus Line Connector
The S8T-BUS03 Bus Line Connector is equipped with a selector to
prevent incorrect connection to a power supply unit with a different
output voltage specification. Slide the selector to the 24 V position.
Standard mounting Yes
Back-down mounting No
Other mounting No
Correct
Standard mounting Incorrect
Back-down mounting
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
S8T-DCBU-02 S8T-DCBU-02 S8T-DCBU-02
Correct Correct Incorrect
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
DCON
DCLOW
DCLOW
V.ADJ
+V
-V
L
LN
N
50/60Hz
AC100
-240V
Class2
Power
Supply
DC24V
2.5A
INPUT
OUTPUT
1.0A
+V-V
S8TS-06024@S8TS-06024@
Selector

6Buffer Block S8T-DCBU-02
Inserting and Removing the Bus Line
Connector
Pay attention to the following points to maintain electric characteris-
tics.
•Do not insert and remove a Connector more than 20 times.
•Do not touch the Connector terminals.
•To remove a Connector, insert a flat-blade screwdriver alternately
at both ends.
Mounting to DIN Track
To mount the Block to DIN Track, hook portion (A) of the Block onto
the Track and press the Block in direction (B).
To dismount the Block, pull down portion (C) with a flat-blade screw-
driver and pull out the Block.
Checking Operation
After connecting the Blocks, check the Buffer Block using the follow-
ing procedure to confirm that it operates correctly for momentary
power failures on the AC input. Use this procedure for maintenance
as well.
1. Turn ON the AC power supply that has been connected.
2. Check the READY indicator on the S8T-DCBU-02 to confirm that
it is lit.
Note: Up to 60 seconds is required to charge the internal capacitor
before the indicator lights.
3. Use a timer and create a momentary power failure on the AC
input of the expected length of time. Considering variations in
characteristics, using 140% or more of the power failure time is
recommended.
Operation Check and Periodic Inspection
4. Check to confirm that the expected backup operation was per-
formed. The operation of the BACKUP indicator and BACKUP
output should be as shown below during the backup operation.
Check these as well.
Note: Check the backup operation under conditions that are safe and
will cause no problems if the backup operation fails.
B
A
30 mm min.
Track stopper
C
READY 1
2
READY output relayIndicator
Indicator lit
(READY: Green) Relay (READY) (1)-(2): open
H5CX-A
Digital Timer
E mode: Set for NPN input.
Load
6 7 8 9
11 12 13
10
1 2 3 4 5
SW
Not
used.
AC
Not
used. Not
used.
BACKUP 3
4
BACKUP output relayIndicator
Indicator lit
(BACKUP: Red) Relay (BACKUP) (3)-(4): closed

Buffer Block S8T-DCBU-02 7
■Functions
READY Operation
The READY indicator and READY output will function as shown
below after the internal capacitor is completely charged and the
Block is ready to perform the backup operation. Up to 60 seconds is
required for the capacitor to charge completely.
The following status will occur if there is an error in the charge volt-
age of the internal capacitor or the output voltage of the
S8T-DCBU-02.
The backup operation will not be sufficient or will fail under the above
status. If this status occurs, immediately remove the cause of the
error, such as the following causes.
1. The connected DC voltage is 23 V or less.
2. The terminals have been connected in reverse or wiring is other-
wise not correct.
3. The overvoltage protection circuit has operated.
4. The overcurrent protection circuit of the connected power supply
has operated.
Note: The contact capacity of the output relay is 0.1 A at 24 VDC.
Backup Operation
The S8T-DCBU-02 will switch to the backup operation if a voltage
drop is detected on the connected power supply.
When the backup operation functions, the energy in the internal
capacitor will be discharged to the load. When the voltage of the
power supply then recovers, the S8T-DCBU-02 will start charging the
capacitor. Up to 60 seconds is required to charge the capacitor com-
pletely. The backup operation may therefore not function for the
required period if the backup operation starts while the capacitor is
being charged.
The following are examples in which the backup operation may not
be sufficient.
1. The backup operation starts within 60 seconds after turning ON
the power supply.
2. The backup operation is started consecutively within 60 seconds
of the previous backup operation.
3. A rapid change in the load or other factor causes the DC voltage
to drop, resulting in the backup operation, and then the backup
operation occurs again within 60 seconds.
The READY indicator and READY output will function as shown
below when the internal capacitor is being charged.
Note: 1. The contact capacity of the output relay is 0.1 A at 24 VDC.
2. The backup operation may be repeatedly performed if the
connected power supply is overloaded. Remove the cause
of the overload immediately.
3. The backup operation does not detect drops in the AC input.
Overcurrent Protection
The overcurrent protection circuit will operate at an overcurrent
detection point of 5.8 to 6.8 A to automatically reduce the output volt-
age and protect equipment against shorts and overcurrents. Normal
operation will be restored automatically when the overcurrent status
is eliminated.
Note: Continuing operation in an overcurrent status may result in de-
terioration of or damage to internal parts.
Overvoltage Protection
If a voltage that is higher than the specified input voltage range is
input or the output voltage exceeds the specified voltage, the over-
voltage protection circuit will operate at between 31 and 36 V to shut
OFF the output voltage and protect the load from damage due to
overvoltages.
To restore operation, turn OFF the input power supply for 1 minute or
longer and then turn it back ON.
Note: 1. Remove the cause of the overvoltage before turn the input
power supply back ON.
2. The backup operation will not be performed when the over-
voltage circuit operates to shut OFF the output.
Reverse Connection Protection
The S8T-DCBU-02 will be protected even if the positive and negative
I/O terminals are connected in reverse.
READY
READY output relayIndicator
1
2
Indicator lit
(READY: Green) Relay (READY) (1)-(2): open
READY output relayIndicator
READY 1
2
Indicator not lit
(READY: Green) Relay (READY) (1)-(2): closed
BACKUP 3
4
BACKUP output relayIndicator
Indicator lit
(BACKUP: Red) Relay (BACKUP) (3)-(4): closed
READY output relayIndicator
READY 1
2
Indicator not lit
(READY: Green) Relay (READY) (1)-(2): closed

8Buffer Block S8T-DCBU-02
Nomenclature
Buffer Block
S8T-DCBU-02
A, B: READY Output: NC contact
C, D: BACKUP Output: NC contact
E: READY Indicator (READY: Green)
F: BACKUP Indicator (BACKUP: Red)
G: NC
H: Slider
I: Protective Earth Terminal
J: I/O Terminal (−V)
K: I/O Terminal (+V)
L: Rail Stopper
M: Connecting part of Bus Line Connector
N: Terminal Block Cover
Bus Line Connector
S8T-BUS-03
A: Selector
B: Ground Terminal
C: NC
D: DC Terminal (+V)
E: Bus Line DC Terminal (−V)
2
1
3
4
7
5
6
13
14
14
1110 9
12
8

Buffer Block S8T-DCBU-02 9
Engineering Data
■Characteristics
Derating Curve Note: 1. If natural air circulation is limited, use the forced air cooling
to prevent overheating.
2. The ambient temperature is measured at a point 50 mm be-
low the Buffer Block.
3. Check the derating curve for each power supply to be con-
nected. Refer to Connections to the S8TS (Reference Val-
ues) on page 11 for details on the derating curves when
connecting the Buffer Block to the S8TS-06024@Power
Supply.
Time Charts
Startup Momentary Power Failure or Voltage Drop
Power Supply Interrupted or Stopped
2.5
2.0
1.5
1.0
0.5
Current during backup operation (A)
Ambient temperature (°C)
−20 −100 1020304050607080
Charging
time
open
closed
open
closed
AC input
Internal capacitor voltage
I/O terminal voltage
READY output
BACKUP output
BACKUP indicator
Output current of the
S8T-DCBU-02
READY indicator
Power supply output hold time Power supply
restart time
AC input
Internal capacitor voltage
I/O terminal voltage
BACKUP indicator
Output current of the
S8T-DCBU-02
Backup time
open
closed
open
closed
READY output
BACKUP output
READY indicator
open
closed
open
closed
Backup time
2 seconds (typical)
AC input
Internal capacitor voltage
I/O terminal voltage
BACKUP indicator
Output current of the
S8T-DCBU-02
READY output
BACKUP output
READY indicator

10 Buffer Block S8T-DCBU-02
■Backup Time
Single Operation Parallel Operation with 2 Blocks
Parallel Operation with 3 Blocks Parallel Operation with 4 Blocks
Note: 1. The backup time may be reduced if a fixed power load (such as a DC-DC converter) is connected.
2. If the input voltage increases, the output voltage for the backup operation will also increase, reducing the backup time due to the higher
power consumption of the load.
10
1
0.1
Backup time (s)
Load current (A)
0.0 0.5 1.0 1.5 2.0 2.5
Vin = 24 V typical
Vin = 24 V guaranteed
Vin = 28 V typical
10
1
0.1
Backup time (s)
Load current (A)
0.0 1.0 2.0 3.0 4.0 5.0
Vin = 24 V typical
Vin = 24 V guaranteed
Backup time (s)
Load current (A)
10
1
0.1 0.0 1.5 3.0 4.5 6.0 7.5
Vin = 24 V typical
Vin = 24 V guaranteed
10
1
0.1
Backup time (s)
Load current (A)
0.0 2.0 4.0 6.0 8.0 10.0
Vin = 24 V typical
Vin = 24 V guaranteed

Buffer Block S8T-DCBU-02 11
■Connections to the S8TS (Reference Values)
Derating Curves of the S8TS-06024@When Connecting to the S8TS-06024@
Note: 1. “+1” indicates the addition of one more S8TS-06024@Basic
Block if a redundant system is used.
2. If natural air circulation is limited, use forced air cooling to
prevent overheating.
3. The ambient temperature is specified at a place 50 mm be-
low the Product.
4. The energy consumption of the S8T-DCBU-02 (approxi-
mately 10 W per Block) from the S8TS-06024@reduces the
total output capacity when more than one S8TS-06024@
Block is connected.
5. The rated output current of the S8T-DCBU-02 is 2.5 A per
Block regardless of the number of S8TS-06024@Blocks
that are connected.
Number of
S8TS-06024@
Blocks
S8TS-06024@
rated input Number of
S8T-DCBU-02
Blocks
Derating
curve Rated output
power
1 200 to 240 VAC 1 *1 50 W
100 to 120 VAC 1 *2 50 W
1 (+1) 100 to 120/200
to 240 VAC 1 *3 44 W
2 1 *4 110 W
2 (+1) 1 *5 98 W
3 1 *6 170 W
3 (+1) 1 *7 152 W
4 1 *8 230 W
4 (+1) 1 *9 206 W
1 200 to 240 VAC 2 *10 40 W
100 to 120 VAC 2 *11 40 W
1 (+1) 100 to 120/200
to 240 VAC 2 *12 34 W
2 2 *13 100 W
2 (+1) 2 *14 88 W
3 2 *15 160 W
3 (+1) 2 *16 142 W
1 200 to 240 VAC 3 *17 30 W
100 to 120 VAC 3 *18 30 W
1 (+1) 100 to 120/200
to 240 VAC 3 *19 24 W
2 3 *20 90 W
2 (+1) 3 *21 78 W
1 200 to 240 VAC 4 *22 20 W
100 to 120 VAC 4 *23 20 W
120
100
80
60
40
20
0
*4
*5
60
50
40
30
20
10
0
Output power (W)
Ambient temperature (°C)
−20−100 102030405060
*3
*1
*2
Output power (W)
Ambient temperature (°C)
−20−100 102030405060
250
200
150
100
50
0
*8
*9
45
40
35
30
25
20
15
10
5
0
*11
*12
*10
120
100
80
60
40
20
0
*13
*14
Output power (W)
Ambient temperature (°C)
Output power (W)
Ambient temperature (°C)
Output power (W)
Ambient temperature (°C)
180
160
140
120
100
80
60
40
20
0
−20 −10
*6
*7
Output power (W)
Ambient temperature (°C)
0102030405060 −20 −10 0102030405060
−20 −10 0102030405060 −20 −10 0102030405060
180
160
140
120
100
80
60
40
20
0
*16
*15 35
30
25
20
15
10
5
0
*19
*17
*18 *21
*20
100
90
80
70
60
50
40
30
20
10
0
Output power (W)
Ambient temperature (°C)
Output power (W)
Ambient temperature (°C)
Output power (W)
Ambient temperature (°C)
*22
25
20
15
10
5
0
*23
Output power (W)
Ambient temperature (°C)
−20 −10 0102030405060
−20 −10 0102030405060 −20 −10 0102030405060 −20 −10 0102030405060

12 Buffer Block S8T-DCBU-02
■Power Supply Output Hold Times (Reference Values)
The rated currents are given for load currents.
Series Model
number Load current (A) Output hold time (ms)
100 VAC 200 VAC
S8TS 06024@0.5 163 167
1 98 100
1.5 70 70
2.1 56 58
S8VS 06024@0.5 158 664
1 88 382
1.5 57 266
2.1 36 194
09024@@ 1 118 508
2 58 274
2.95 34 176
12024@@ 1 262 262
2 148 148
3 102 102
47575
4.2 72 72
18024@@ 2 225 230
4 107 120
67175
6.3 65 70
24024@@ 2.5 170 170
56872
7.5 52 56
8.4 40 44
S82K 03024 0.25 192 792
0.5 120 515
0.75 82 375
0.9 66 315
05024 0.5 118 505
1 66 295
1.5 41 200
1.7 35 178
09024/
10024 1 130 130
26773
34146
3.4 34 39
P09024/
P10024 1 140 124
27568
34641
3.4 41 36
24024@2.5 164 170
58186
7.5 50 56
8.4 42 48
P24024@2.5 185 192
5 93 105
7.5 60 67
8.4 51 58
Series Model
number Load current (A) Output hold time (ms)
100 VAC 200 VAC
S82J 02524@@ 0.2 170 700
0.4 105 470
0.6 74 345
0.7 62 300
05024@@ 0.5 117 524
1 65 300
1.5 44 210
1.7 38 185
10024@@ 1 133 600
2 71 325
3 46 210
3.7 37 173
15024@@ 1.5 133 144
36673
4.5 42 50
5.3 34 40
30024@2.5 190 200
5 100 105
7.5 68 70
10 48 50
60024@2.5 353 365
5 193 203
7.5 130 138
10 98 104
S8PS 05024@@ 0.5 145 167
1 98 100
1.5 74 79
1.7 72 75
10024@@ 1 160 160
2 100 100
37070
3.7 52 52
15024@@ 1.5 260 300
3 128 130
4.5 73 75
5.3 50 52
30024@@ 2.5 440 440
5 220 220
7.5 131 132
10 80 80

Buffer Block S8T-DCBU-02 13
■Power Supply Restart Times (Reference Values)
Dimensions
Note: All units are in millimeters unless otherwise indicated.
■Buffer Block
Buffer Block
S8T-DCBU-02
Series Model number Restart time (ms)
Momentary power failure time:
300 ms Momentary power failure time: 500 ms Momentary power failure time: 1,000 ms
100 VAC 200 VAC 100 VAC 200 VAC 100 VAC 200 VAC
S8TS 06024@320 270 320 270 345 290
S8VS 06024@220 5 280 95 380 155
09024@@ 220 5 286 100 390 157
12024@@ 360 248 400 288 432 322
18024@@ 230 198 247 216 263 235
24024@@ 5555155
S82K 03024 14 6 14 6 14 6
05024 16 8 16 8 16 8
09024/10024 5 5 60 52 65 60
P09024/P10024 68 54 68 54 70 56
24024@86 52 86 52 86 52
P24024 14 5 350 126 396 150
S82J 02524@@ 11 10 11 10 12 11
05024@@ 188 72 200 82 224 100
10024@@ 175 4 198 82 218 98
15024@@ 210 76 216 76 218 76
30024@117 70 117 70 117 70
60024@158 86 158 86 158 86
S8PS 05024@@ 196 172 208 174 292 224
10024@@ 225 180 233 187 287 217
15024@@ 225 184 240 198 337 252
30024@@ 325 304 330 325 340 335
6
×
M4 wi
t
h
s
q
uare washe
r
5
.
6
(Slidin
g
: 15 max.
)
2.
5
1
0
12
0
43
5
4
1
05
35
80
.
7

14 Buffer Block S8T-DCBU-02
Bus Line Connector
S8T-BUS03
■DIN Tracks
Mounting Tracks (Material: Aluminum)
PFP-100N
PFP-50N
PFP-100N2
End Plate
PFP-M
5.5
Sliding
5.5
Sliding
28.6
24 7.6
18 42.5
13
5
2
35
7
0
10
4.5
15 25 25
10 10
1,000 (500)* 25 25 15 (5)*
35±0.3
7.3±0.15
27±0.15
1
* Values in parentheses
are for the PFP-50N.
4.5
15 25 25
10 10
1,000 25 25 15 1 1.5
29.2242735±0.3
16
50
11.5
10 4.8
1.3
1.8
1
10 6.2 1.8
35.5 35.3
M4 ×8
pan-head screw
M4 spring
washer

Buffer Block S8T-DCBU-02 15
Safety Precautions
Installation and Environment
Operation
Maintenance
■Precautions for Safe Use
Observe the following precautions to ensure safety when using the
S8T-DCBU-02.
Setting and Selecting Power Supply to
be Connected
•Do not connect a power supply other than the ones specified
below.
Specified Power Supply: S8TS Series, S8VS Series
(SELV Power Supply) S82K Series, S82J Series, S8PS Series.
Only power supplies with an output voltage of 24 V and an output
capacity of 25 W or more can be connected.
•When selecting the power supply to be connected, take both the
operation current and power of S8T-DCBU-02 into consideration,
allowing sufficient margin.
Mounting
•The internal parts may occasionally deteriorate or be broken due to
adverse heat radiation. Operate the S8T-DCBU-02 only under the
specified conditions.
•Ensure sufficient heat dissipation when installing the Product to
increase its long-term reliability.
•Install the Product so that a natural airflow occurs around it.
Installation/Wiring
•Minor electric shock or malfunction may possibly occur. Connect
the ground wire completely.
•Minor fires may possibly occur. Check the terminals to be sure they
are wired correctly.
•Do not apply a force greater than 100 N to the terminal block when
tightening the terminals.
•Close the terminal cover to help prevent short-circuiting terminals
with foreign objects.
•Be sure to remove the sheets covering the S8T-DCBU-02 before
turning ON the power supply and confirm that nothing is interfering
with heat dissipation.
•Use the wiring material specified in the following table to protect
wires from smoking and burning due to load abnormalities. Also,
the backup operation may not be sufficient due to voltage drop if
thin wiring materials are used.
I/O Terminals
Signal output terminals: AWG 14 to 22 (Cross-sectional area:
0.326 to 1.309 mm2)
(Wire stripping length: 11 mm)
Installation Environment
•Do not install the S8T-DCBU-02 in places subjected to shock or
vibration. A device such as a contact breaker may be a vibration
source. Install the S8T-DCBU-02 as far as possible from possible
sources of shock or vibration. Additionally, install a PFP-M End
Plate on each end of the Product.
•If the S8T-DCBU-02 is used in an area with excessive
high-frequency noise, be sure to separate the S8T-DCBU-02 as far
as possible from the noise sources.
Minor fires may occasionally occur or wires may become
detached causing the backup operation to fail if screws
are not tightened properly. Tighten terminal screws to a
torque of 1.08 N·m so that they do not become loose.
Minor electric shock may occasionally occur. Do not
remove the connector cover unless connecting the Bus
Line Connector.
Minor electric shock may occasionally occur and the
backup operation will fail if the connector becomes
disconnected. Be sure to lock the slider and track
stopper securely when connecting the Basic Block and
the S8T-DCBU-02 to prevent the connector from being
disconnected due to vibration.
Internal parts may occasionally deteriorate or be
damaged and the backup operation may not be
sufficient. Do not use the S8T-DCBU-02 for applications
that subject the load to frequent inrush currents or
overload currents.
The S8T-DCBU-02 may occasionally be damaged. Do
not allow any clippings or cuttings to enter the
S8T-DCBU-02 during mounting.
Minor burns may occasionally occur. Do not touch the
S8T-DCBU-02 while power is being supplied or
immediately after power is turned OFF.
Minor electric shock may occasionally occur. Do not add
or remove the S8T-DCBU-02 while power is being
supplied.
Minor electric shock may occasionally occur. Do not
disassemble the S8T-DCBU-02 or touch the interior of
the S8T-DCBU-02.
!CAUTION
Load
current Number of connected
S8T-DCBU-02
Recommended wire diameter
Up to 2.5 A 1 AWG 14 to 20 (cross-sectional
area: 0.517 to 2.081 mm2)
Up to 5.0 A 2 AWG 14 to 18 (cross-sectional
area: 0.823 to 2.081 mm2)
Up to 7.5 A 3 AWG 14 to 16 (cross-sectional
area: 1.309 to 2.081 mm2)
Up to 10 A 4 AWG 14 (cross-sectional area:
2.081 mm2)
*
1
*
1
*
1
*
1
*1
*
1
S8
T
S
-
060
24
@
S8
T-D
C
B
U
-
0
2
*
2
*
3
*
2
*
3
*
4
*
4
*1. Direction of air circulation
*2. 75 mm min. *3. 75 mm min. *4. 20 mm min.

16 Buffer Block S8T-DCBU-02
Ambient Operating Environment and Storage Environment
•Store the S8T-DCBU-02 at an ambient temperature of −25 to
+65°C, and a relative humidity of 25% to 90%.
•The internal parts may occasionally deteriorate or be broken. Do
not use the S8T-DCBU-02 outside the derating range (i.e., under
conditions indicated by the shaded area ( ) in the derating
curve diagram on page 9.)
•Use the S8T-DCBU-02 at a relative humidity of 25% to 85%.
•Do not use the S8T-DCBU-02 where it would be subjected to direct
sunlight.
•Do not use the S8T-DCBU-02 where it would be subjected to
penetration of liquid, foreign substance, or corrosive gas.
Precautions in Using
•After connecting the devices to the S8T-DCBU-02, check whether
sufficient backup is performed correctly by operating the
S8T-DCBU-02.
•Check the load current using the actual system in advance to
confirm that there is sufficient leeway in the backup time.
•Check to confirm that the READY indicator and the output function
correctly. The backup operation may not be sufficient if the READY
indicator and output do not function correctly.
•The S8T-DCBU-02 will perform the backup operation not only for
instantaneous power interruptions or voltage drops, but also when
the power supply is OFF. The backup time is particularly long for
light loads. Check the devices connected to the S8T-DCBU-02 to
be sure it has stopped operation correctly.
Periodic Inspection and Periodic Replacement
The S8T-DCBU-02 contains built-in electrolytic capacitors, which
have a limited life. Perform periodic inspection and replacement. The
performance of the electrolytic capacitor will deteriorate as the total
operating time increases, eventually leading to insufficient
performance. Refer to the following guidelines for periodic
replacement.
Note: The load ratioof the S8TS is limited to 60% due tothe derating
curve.
Charging Batteries
If a battery is to be connected as the load, mount an overcurrent
limiting circuit and an overvoltage protection circuit.
Handling the Bus Line Connector
•Do not drop the Bus Line Connector or subject it to strong shock.
•Do not connect and disconnect the Bus Line Connector more than
20 times. Also, do not touch the terminals on the Bus Line
Connector. Connection failure may cause deterioration of electric
performance.
Ambient
temperature Guideline of replacement
With space between
the Units Connected to S8TS
30°C max. 15 years 15 years
40°C 12 years 8.5 years
50°C 6 years 5.5 years (See note.)
60°C 3 years ---

Buffer Block S8T-DCBU-02 17
Troubleshooting
The following table lists the errors that may occur when the S8T-DCBU-02 is used, along with their probable causes and remedies. Check the rel-
evant items.
When Cause Description Remedies
During installation The S8TS-06024@and
S8T-DCBU-02 cannot be
connected.
The Bus Line Connector is provided with a se-
lector to prevent misconnection of 12-V and 5-V
S8TS Blocks. Connection will not be possible if
the selector is set for the wrong type of Block.
Set the selector on the Bus Line Connector to
24 V.
Refer to S8T-BUS03 Bus Line Connector on
page 5.
When checking
operation
(RefertoChecking
Operation on
page 6.)
The S8TS-06024@con-
nected in step 2 of the oper-
ation checking procedure
does not operate.
The AC line is not connected by the
S8T-BUS03 Bus Line Connector when the
S8TS-06024@is connected.
The S8T-DCBU-02 may be connected between
two S8TS-06024@Blocks.
Connect the S8T-DCBU-02 to the right or left
end of the connected Blocks. Refer to Mounting
on page 5.
The READY indicator on
the S8T-DCBU-02 does not
light in step 2 of the opera-
tion checking procedure
when connected to the
S8TS.
Power is supplied via the S8T-BUS03 Bus Line
Connector when the S8T-DCBU-02 and S8TS
are connected. The Bus Line Connector may
not be connected.
Connect the S8T-DCBU-02 and S8TS-06024@
using an S8T-BUS03 Bus Line Connector. Re-
fer to Basic Configuration on page 1.
ABusLineConnector that doesnot connect the
DC line (such as the S8T-BUS02) may be con-
nected.
Connect the S8T-DCBU-02 and S8TS-06024@
using an S8T-BUS03 Bus Line Connector. Re-
fer to Basic Configuration on page 1.
The READY indicator on
the S8T-DCBU-02 does not
light in step 2 of the opera-
tion checking procedure.
Up to 60 seconds is required to completely
charge the internal capacitor after the power
supply has been turned ON. The READY indi-
cator will not turn ON immediately after the
power supply is turned ON.
Check that the READY indicator lights after 60
seconds has passed since turning ON the pow-
er supply. Refer to READY Operation on
page 7.
The positive and negative I/O terminals on the
S8T-DCBU-02 may be connected in reverse or
the power supply may be connected to an incor-
rect terminal (e.g., an NC terminal).
Check the wiring to be sure it is correct. The in-
ternal circuits of the S8T-DCBU-02 will be pro-
tected even if the positive and negative
terminals are reversed. Refer to Reverse Con-
nection Protection on page 7.
The voltage input to the S8T-DCBU-02 may be
23 V or less. Check the I/O terminals on the S8T-DCBU-02 and adjust the voltage output by the power sup-
ply so that it is 24 V or higher. Refer to Input
Voltage on page 5.
Overcurrent protection on the connected power
supply mayhaveoperated and the voltage may
have dropped to below 23 V.
The S8T-DCBU-02 consumes 0.4 A, so the rat-
ed current of the connected power supply can-
not be delivered completely to the load.
Increase the capacity of the connected power
supply. Refer to Selecting the Power Supply on
page 4.
Thebackupoperationisnot
performed for the expected
backup time in step 4 of the
operation checking proce-
dure.
The restart time of the connected power supply
after recovery from momentary power failures
may be too long.
The momentary power failure time differs from
the backup time required to compensate for it.
Change to a power supply with a shorter restart
timeorconnectS8T-DCBU-02Blocksinparallel
to increase the backup time. Refer to Selecting
the Power Supply on page 4.
The voltage during the backup operation may
be high, increasing the power consumption dur-
ing the backup operation.
The output voltage during the backup operation
is automatically adjusted based on detecting
the voltage input to the S8T-DCBU-02. Connect
S8T-DCBU-02 Blocks in parallel to increase the
backup time. Refer to Parallel Operation Con-
nection on page 5.
The output current during the backup operation
may be higher than expected. Connect S8T-DCBU-02 Blocks in parallel to in- crease the backup time. Refer to Parallel Oper-
ation Connection on page 5.
The voltage output for the
backup operation is low in
step 4 of the operation
checking procedure.
Overcurrent protection on the connected power
supplymayhaveoperatedandthevoltageinput
to the S8T-DCBU-02 may have dropped to be-
low 24 V.
The S8T-DCBU-02 consumes 0.4 A, so the rat-
ed current of the connected power supply can-
not be delivered completely to the load.
Increase the capacity of the connected power
supply. Refer to Selecting the Power Supply on
page 4.
The wiring to the load is too long or too thin,
causing excessive voltage drop. Use the thickest wire and shortest distance pos- sible. The output voltage during backup will be
up to 2 V lower than the input voltage. Refer to
Wiring Connections on page 5.

18 Buffer Block S8T-DCBU-02
When checking
operation
(RefertoChecking
Operation on
page 6.)
The voltage output for the
backup operation is low in
step 4 of the operation
checking procedure.
Overcurrent protection may have operated on
the S8T-DCBU-02. Allow for leeway for the load capacity in the ap- plication or increase the output current during
the backup operation by connecting
S8T-DCBU-02 Blocks in parallel.Refer to Paral-
lel Operation Connection on page 5.
When checking
operation(Referto
Checking Opera-
tion on page 6.)
The BACKUP indicator
does not light in step 4 of
the operation checking pro-
cedure.
The output hold time of the connected power
supply may be sufficient to handle the momen-
tary power failure.
Use a timer to increase the power failure of the
AC input from the connected power supply and
confirm that the BACKUP indicator lights. Refer
to Selecting the Power Supply on page 4.
The voltage output from the S8T-DCBU-02 dur-
ing the backup operation may belower because
overcurrent protection has operated in the
S8T-DCBU-02.
Allow for leeway for the load capacity in the ap-
plication or increase the output current during
the backup operation by connecting
S8T-DCBU-02 Blocks in parallel.Refer to Paral-
lel Operation Connection on page 5.
During actual
operation The READY indicator is not lit and the READY output is
OFF.
The voltage input to the S8T-DCBU-02 may be
23 V or less. Check the voltage at the I/O terminals of the S8T-DCBU-02 and adjust the voltage output by
the power supply so that it is24 V or higher. Re-
fer to Input Voltage on page 5.
A voltage of approximately 31 V or higher may
be input to the I/O terminals of the
S8T-DCBU-02, causing the overvoltage protec-
tion circuit to operate.
Clear the overvoltage protection (turn OFF the
input power supply for 1 minute or longer and
then turn it back ON). Refer to Overvoltage Pro-
tection on page 7.
The backup time has be-
come shorter. It's possible that momentary power failures are occurring consecutively. The backup time is measured when the built-in electrolytic capacitors are fully charged. If mo-
mentary power failures occur within one minute
of each other, the charge will not be complete
and the backup time will be shorter. Refer to
Backup Operation on page 7.
It's possible that the characteristics of the built-
in electrolytic capacitors have deteriorated. Electrolytic capacitors are built into the Block and these capacitors have a limited life. When
an electrolytic capacitor exceeds its useful life,
its capacity will decrease and other characteris-
tics will deteriorate. This will cause the backup
time to be shorter. Refer to Operation Check
and Periodic Inspection on page 6 and to Peri-
odic Inspection and Periodic Replacement on
page 16.
There is chattering on the
READY output. The input voltage of the S8T-DCBU-02 may be very close to 23 V. Check the voltage at the I/O terminals of the S8T-DCBU-02 and adjust the voltage output by
the power supply so that it is24 V or higher. Re-
fer to Input Voltage on page 5.
The output voltage is not re-
stored even after the power
supply is restored following
a momentary power failure.
Protection on the connected power supply may
have operated, stopping the operation of the
power supply.
Clear the protection function of the connected
power supply.
The backup operation is
performed repeatedly. If more than one S8TS-06024@Block is con- nected, one of the Blocks may be faulty. Replace the faulty S8TS-06024@Block.
An overcurrent status caused by load fluctua-
tion may exist in the power supply. Allow for leeway for the load capacity in the ap- plication or increase the capacity of the con-
nected power supply. Refer to Backup
Operation on page 7.
When Cause Description Remedies

Buffer Block S8T-DCBU-02 19

20
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. T029-E1-01A
OMRON Corporation
Industrial Automation Company
Industrial Devices and Components Division H.Q.
Power Electronics Department
Shiokoji Horikawa, Shimogyo-ku,
Kyoto, 600-8530 Japan
Tel: [phone]/Fax: [phone] (0603)
Warranty and Application Considerations
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.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or
other period if specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT,
MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER
ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET
THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS,
OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON
CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS 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 OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of
products in the customer's application or use of the products.
Take all necessary steps to determine the suitability of the product for the systems, machines, and equipment with which it will
be used.
Know and observe all prohibitions of use applicable to this product.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT
ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON
PRODUCTS ARE PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR
SYSTEM.
Disclaimers
PERFORMANCE DATA
Performance data given in this catalog 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 users must correlate it to actual application
requirements. Actual performance is subject to the OMRON Warranty and Limitations of Liability.
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons. Consult with
your OMRON representative at any time to confirm actual specifications of purchased product.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.