Installation Instructions
WARNING
ATTENTION
IMPORTANT
SHOCK HAZARD
BURN HAZARD
ATTENTION
ATTENTION
WARNING
WARNING
ATTENTION
ATTENTION
FLEX™ I/O Isolated Output
Analog Module
Cat. No. 1794-OF4I
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication
Automation sales office or online at http://www.rockwellautomation.com/literature/)
describes some important differences between solid state equipment and hard-wired
electromechanical devices. Because of this difference, and also because of the wide variety of
uses for solid state equipment, all persons responsible for applying this equipment must
satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular installation,
Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the
examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of
Rockwell Automation, Inc., is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or
death, property damage, or economic loss.
Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions
help you:
identify a hazard
avoid a hazard
recognize the consequence
Identifies information that is critical for successful application and understanding
of the product.
Labels may be located on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
SGI-1.1 available from your local Rockwell
Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in IEC
publication 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR Publication 11. Without appropriate precautions,
there may be potential difficulties ensuring electromagnetic compatibility
in other environments due to conducted as well as radiated disturbance.
This equipment is supplied as open-type equipment. It must be mounted
within an enclosure that is suitably designed for those specific
environmental conditions that will be present and appropriately designed
to prevent personal injury resulting from accessibility to live parts. The
enclosure must have suitable flame-retardant properties to prevent or
minimize the spread of flame, complying with a flame spread rating of
5VA, V2, V1, V0 (or equivalent) if non-metallic. The interior of the
enclosure must be accessible only by the use of a tool. Subsequent
sections of this publication may contain additional information regarding
specific enclosure type ratings that are required to comply with certain
product safety certifications.
In addition to this publication, see:
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1, for additional installation requirements.
NEMA Standard 250 and IEC 60529, as applicable, for explanations
of the degrees of protection provided by enclosures.
Preventing Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause
internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
Touch a grounded object to discharge potential static.
Wear an approved grounding wriststrap.
Do not touch connectors or pins on component boards.
Do not touch circuit components inside the equipment.
Use a static-safe workstation, if available.
Store the equipment in appropriate static-safe packaging when not
in use.
If you insert or remove the module while backplane power is on, an
electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is
nonhazardous before proceeding.
Labels may be located on or inside the equipment (for example, drive or
motor) to alert people that surfaces may be dangerous temperatures.
If you connect or disconnect wiring while the field side power is on, an
electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is
nonhazardous before proceeding.
This product is grounded through the DIN rail to chassis ground. Use zinc
plated yellow-chromate steel DIN rail to assure proper grounding. The use
of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or
intermittent grounding. Secure DIN rail to mounting surface approximately
every 200 mm (7.8 in.) and use end-anchors appropriately.
Personnel responsible for the application of safety-related programmable
electronic systems (PES) shall be aware of the safety requirements in the
application of the system and shall be trained in using the system.
Publication 1794-IN037E-EN-P - November 2011
2 FLEX™ I/O Isolated Output Analog Module
WARNING
WARNING
AVERTISSEMENT
ATTENTION
WARNING
45284
6
5
4
3
2
1
7
European Hazardous Location Approval
The following applies when the product bears the Ex Marking.
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3 equipment
intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this
Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
Observe the following additional certification requirements:
This equipment is not resistant to sunlight or other sources of UV
radiation.
This equipment must be installed in an enclosure providing at least
IP54 protection when applied in Zone 2 environments.
This equipment shall be used within its specified ratings defined by
Rockwell Automation.
This equipment must be used only with ATEX certified Rockwell
Automation terminal bases.
Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided
with this product.
Do not disconnect equipment unless power has been removed or the
area is known to be nonhazardous.
Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when applied in
Zone 2 environments.
North American Hazardous Location Approval
The 1794-OF4I module is hazardous location approved.
The following information applies
when operating this equipment in
hazardous locations:
Products marked “CL I, DIV 2, GP A, B, C, D”
are suitable for use in Class I Division 2
Groups A, B, C, D, Hazardous Locations and
nonhazardous locations only. Each product is
supplied with markings on the rating
nameplate indicating the hazardous location
temperature code. When combining
products within a system, the most adverse
temperature code (lowest “T” number) may
be used to help determine the overall
temperature code of the system.
Combinations of equipment in your system
are subject to investigation by the local
Authority Having Jurisdiction at the time of
installation.
EXPLOSION HAZARD
Do not disconnect equipment unless
power has been removed or the area
is known to be nonhazardous.
Do not disconnect connections to
this equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this
equipment by using screws, sliding
latches, threaded connectors, or other
means provided with this product.
Substitution of components may
impair suitability for Class I,
Division 2.
If this product contains batteries,
they must only be changed in an area
known to be nonhazardous.
Informations sur l’utilisation de cet
équipement en environnements dangereux :
Les produits marqués "CL I, DIV 2, GP A, B, C, D"
ne conviennent qu’à une utilisation en
environnements de Classe I Division 2 Groupes
A, B, C, D dangereux et non dangereux. Chaque
produit est livré avec des marquages sur sa
plaque d’identification qui indiquent le code de
température pour les environnements
dangereux. Lorsque plusieurs produits sont
combinés dans un système, le code de
température le plus défavorable (code de
température le plus faible) peut être utilisé pour
déterminer le code de température global du
système. Les combinaisons d’équipements dans
le système sont sujettes à inspection par les
autorités locales qualifiées au moment de
l’installation.
RISQUE D’EXPLOSION
Couper le courant ou s’assurer que
l’environnement est classé non dangereux
avant de débrancher l'équipement.
Couper le courant ou s'assurer que
l’environnement est classé non dangereux
avant de débrancher les connecteurs.
Fixer tous les connecteurs externes reliés
à cet équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.
La substitution de composants peut
rendre cet équipement inadapté à une
utilisation en environnement de Classe I,
Division 2.
S’assurer que l’environnement est
classé non dangereux avant de changer
les piles.
Install the Isolated Analog Output Module
Description Description
1 FlexBus connectors 5 Groove
2 Latching mechanism 6 Alignment bar
3 Keyswitch 7 Module
4 Terminal base
The module mounts on a 1794 terminal base.
1. Rotate the keyswitch (3) on the terminal base (4) clockwise to position 4 as
required for this type of module.
2. Make sure the FlexBus connector (1) is pushed all the way to the left to
connect with the neighboring terminal base/adapter. You cannot install
the module unless the connector is fully extended.
3. Make sure the pins on the bottom of the module are straight so they will
align properly with the connector in the terminal base.
4. Position the module (7) with its alignment bar (6) aligned with the groove
(5) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit. The
module is seated when the latching mechanism (2) is locked into the
module.
If multiple power sources are used, do not exceed the specified isolation
voltage.
For Class I Division 2 applications, use only Class I Division 2 listed or
recognized accessories and modules approved for used within the 1794
platform.
Connect Wiring for 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, and 1794-TB3TS
1. Connect individual high and low signal wiring to numbered terminals on
the 0…15 row (A) as indicated in the
1794-OF4I Output Module table. Use Belden 8761 cable for signal.
2. Connect channel common/return to the associated terminal on row A.
3. Connect the +V DC power to terminal 34 on the 34…51 row (C) and -V
common/return to terminal 16 on the 16…33 row (B).
4. If daisychaining +V power to the next terminal base, connect a jumper
from terminal 51 (+V DC) on this base unit to terminal 34 on the next
base unit.
5. If continuing DC common (-V) to the next base unit, connect a jumper
from terminal 33 (common) on this base unit to terminal 16 on the next
base unit.
6. Connect the shield to functional earth ground as near as possible to the
module.
1794-TB3T, 1794-TB3TS only: Connect the shield to terminals 39…46
(earth ground).
WiringConnections for the
Publication 1794-IN037E-EN-P - November 2011
FLEX™ I/O Isolated Output Analog Module 3
ATTENTION
ATTENTION
ATTENTION
+
+
I
+
A
B
C
+
+
+
+
II
I
_
_
_
_
_
1
234567890
22
23
24
25
26
27
28
29 30
31
32
33
21
16 17 18 19
20
40
41
42
43
44 45
46
47 48
49
50
51
39
34
35
36 37
38
10
11
12
13 14
15
45750
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
I RVRIRVRIRVRIRVR
0...15
16...33
34...51
Current
output
device
Current
output
device
Current
output
device
Voltage
output
device
AC or DC
4-wire output
device
DC only
3-wire output
device
Current only
2-wire output
device
DC only
3-wire output
device
I
+
+
+
+
I
+
I
+
I
+
_
_
_
_
16
10
11
12
13
14
15
33
51
34
0
24
1
6
8
3
5
7
9
45749
Even-numbered terminals 0...1416 33
34 51
Row B
Row C
Odd-numbered
terminals 1...15
DC only
3-wire output
device
Current only
2-wire output
device
DC only
AC or DC
4-wire output
device
Current
output
device
Current
output
device
Current
output
device
Voltage
output
device
Connect only one current or one voltage signal per channel. Do not
connect both current and voltage on one channel.
To reduce susceptibility to noise, power analog modules and digital
modules from separate power supplies.
Connect Wiring for the 1794-TBN
1. Connect individual output wiring to the even-numbered terminals on row
B for each output as indicated in the following table. Use Belden 8761
cable for signal wiring.
2. Connect the associated common/return to the corresponding
odd-numbered terminal on row C for each output as indicated in the
WiringConnections for the 1794-OF4I Output Module table.
3. Connect the +V DC power to terminal 34 on the 34…51 row (C) and -V
common/return to terminal 16 on the 16…33 row (B).
4. If daisychaining +V power to the next terminal base, connect a jumper
from terminal 51 (+V DC) on this base unit to terminal 34 on the next
base unit.
5. If continuing DC common (-V) to the next base unit, connect a jumper
from terminal 33 (common) on this base unit to terminal 16 on the next
base unit.
6. Connect the shield to functional earth ground as near as possible to the
module.
Wiring Connections for the 1794-OF4I Output Module
Channel Signal Type Label
Markings
0 Current I0 A-0 C-39 B-0
Current I0 ret A-1 C-1
Volt age V0 A-2 C-40 B-2
Volt age V0 ret A-3 C-3
1 Current I1 A-4 C-41 B-4
Current I1 ret A-5 C-5
Volt age V1 A-6 C-42 B-6
Volt age V1 ret A-7 C-7
2 Current I2 A-8 C-43 B-8
Current I2 ret A-9 C-9
Volt age V2 A-10 C-44 B-10
Volt age V2 ret A-11 C-11
3 Current I3 A-12 C-45 B-12
Current I3 ret A-13 C-13
Volt age V3 A-14 C-46 B-14
Volt age V3 ret A-15 C-15
-V DC common 1794-TB2, 1794-TB3, 1794- TB3S: Terminals B-16…B-33 are internally connected in the
+V DC power 1794-TB3, 1794-TB3S: Terminals 34…51 are internally connected in t he terminal base unit.
Chassis ground
(shield)
terminal base unit.
1794-TBN: Terminals B-16 and B-33 are internally connected in the terminal b ase unit.
1794-TB3T, 1794-TB3TS: Terminals 16, 17, 19, 21, 23, 25, 27, 29, 3 1 and 33 are internally
connected in the terminal base unit.
1794-TB3T, 1794-TB3TS: Terminals 34, 35, 50 and 51 are internally connected in the terminal
base unit.
1794-TB2, 1794-TBN: Terminals 34 and 51 are internally connect ed in the terminal base unit.
1794-TB3T, 1794-TB3TS: Terminals 39…46 are internally connected to chassis g round.
1794-TB2, 1794-TB3, 1794-TB3S,
1794-TB3T, 1794-TB3TS
Ter mi na l Shield (1794-TB3T,
1794-TB3TS)
1794-TBN
Ter mi na l
Do not remove or replace a Terminal Base unit while power is applied.
Interruption of the backplane can result in unintentional operation or
machine motion.
1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T and 1794-TB3TS Terminal Base
Wiring
1794-TBN Terminal Base Wiring
Input Map
Dec 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Word 0 Read back channel 0
Word 1 Read back channel 1
Word 2 Read back channel 2
Word 3 Read back channel 3
Word 4 PU FP CF 0 Reser ved 0 0 0 0 0 BD DN 0
Word 5 0 0 0 0 P3 P2 P1 P0 0 0 0 0 W3 W2 W1 W0
Where: PU = Power up inconfigured
FP = Field power off
CF = In configuration mode
BD = Bad calibration
DN = Calibration accepted
P0…P3 = Output holding in response to Q0…Q3
W0…W3 = Wire off current loop status for channels 0…3 respectively
Publication 1794-IN037E-EN-P - November 2011
4 FLEX™ I/O Isolated Output Analog Module
Output Map
Dec 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Word 0 EN S1 S0 0 0 0 0 0 0 0 0 0 0 0 0 0
Word 1 Output data channel 0
Word 2 Output data channel 1
Word 3 Output data channel 2
Word 4 Output data channel 3
Word 5 Ch 3 configuration Ch 2 configuration Ch 1 configuration Ch 0 configuration
Word 6 IC 1 TR IT Q3 Q2 Q1 Q0 RV QK CK GO Channel number
Where: EN = Inable output; 0 = Output follows S1/S0, 1 = Output enabled
S1/S0 = Safe state source
IC = Initiate configuration bit
TR = Transparent bit
IT = Interrupt toggle bit
Q0…Q3 = Requests for outputs to hold
RV = Revert to default bit
QK = Quick calibration
CK = Calibration clock
GO = Gain offset select
Configure the Output Channels
Configuration Bits Nominal Range Data Type Output Values Module Update
MSD LSD
0 0 0 1 4...20 mA Signed 2’s
0 0 1 0 ±10V <831F…7CE1> 2.5 ms
0 0 1 1 ±5V <8618…79E8> 2.5 ms
0 1 0 0 0...20 mA Signed 2’s
0 1 0 1 4…20 mA <0…10000> 5.0 ms
0 1 1 0 0…10V 0…10000 5.0 ms
0 1 1 1 ±10V <-10000…10000> 5.0 ms
1 0 0 0 0…20 mA Binary 0000…F3CF 2.5 ms
1 0 0 1 4…20 mA 0000…F0F1 5.0 ms
1 0 1 0 0…10V 0000…F9C2 2.5 ms
1 0 1 1 0…5V 0000…F3CF 2.5 ms
1 1 0 0 0…20 mA Offset binary <0618…F9E8> 2.5 ms
1 1 0 1 4…20 mA <8000…F878> 5.0 ms
1 1 1 0 ±10V <031F…FCE1> 2.5 ms
1 1 1 1 ±5V <0618…F9E8> 2.5 ms
complement
complement %
<0000…7878> 5.0 ms
0…10000> 5.0 ms
Rate
Status Indicator
The OK status indicator is two-colored: red and green. The indicator flashes green
for one of three reasons:
1. The module configuration word is zero (for example, power up reset
condition).
2. The 24V DC user power is off.
3. The module is in configuration mode.
The indicator displays red to indicate that the module did not pass the initial
hardware test. Cycle power again.
After power up, if the status indicator is not flashing green or solid green, cycle
module power once more to verify a proper reset of the bus interface.
Specifications
General Specifications
Attribute Value
Number of outputs 4 isolated
Module location 1794-TB2, 1794-TB3, 1794-TB3S, 1794 -TB3T, 1794-TB3TS, 1794-TBN
FlexBus voltage 5V DC
FlexBus current 50 mA
External DC power supply,
nom voltage range
External DC power supply
current
Thermal dissipation, max 16 BTU/hr @ 31.2V DC
Power dissipation, max 4.7 W @ 31.2V DC
Isolation voltage 120V (continuous), Basic Insulation Type, channel to channel, channel to user,
24V DC
19.2…31.2V DC (includes 5% AC ripple)
210 mA @ 24V DC
channel to system, and user power to system whe n used with 1794-TB2,
1794-TB3, 1794-TB3S, 1794-TB3T, or 1794-TB3TS.
250V (continuous), Basic Insulation Type, channel to channel, channel to user,
channel to system, and user power to system when u sed with 1794-TBN.
Type tested at 1000V AC for 60 s.
General Specifications
Data format 2’s complement
Indicators 1 red/green power/ status indicator
Keyswitch position 4
Dimensions, with module
installed in base; HxWxD
Conductor category
Conductor wire size Determined by installed terminal base
Wire type Shielded on signal ports
North American temp code T4 A
IEC temp code T4
(1)
Use this conductor category information for planning conductor routing. Refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1
(1)
2’s complement %
Binary
Offset binary
94.0 x 94.0 x 66.0 mm
(3.7 x 3.7 x 2.6 in.)
2 – on signal ports
2 – on power ports
.
Module Specifications – 1794-OF4I
Attribute Value
Resolution
Volt age
Current
15 bits plus sign
0.320 mV/cnt
0.656 mA/cnt
Conversion type Digita l-to-analog converter
Update rate 2.5/5.0 ms all channels (see Configure the Output Channels
Output current terminal 0 mA output until module is configured
Output voltage terminal 0V output until module is configured
Step response to 63% of full
scale
Current load on voltage
output, max
Resistive load on voltage
output
Absolute accuracy
Voltage terminal
Current terminal
Accuracy drift w/temperature
Voltage terminal
Current terminal
4…20 mA (user configurable)
0…20 mA (user configurable)
±10V (user configurable)
0…10V (user configurable)
±5V (user configurable)
0…5V (user configurable)
< 25 s
3 mA
0…750
0.1% full scale @ 25 °C
0.1% full scale @ 25 °C
0.0012% full scale/°C
0.0025% full scale/°C
table)
Calibration Factory calibrated; can be recalibrated when necessary.
Maximum overload 30V continuous or 32 mA continuous, one channel at a time.
Environmental Specifications
Attribute Value
Temperature, operating IEC 60068-2-1 (Test Ad, Operating Cold),
Temperature, surrounding air,
max.
Temperature, nonoperating IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Col d),
Relative humidity IEC 60068-2- 30 (Test Db, Unpackaged Damp Heat):
Vibration IEC60068-2-6 (Test Fc, Operating):
Shock, operating IEC60068-2-27 (Test Ea, Unpackaged shock):
Shock, nonoperating IEC60068-2-27 (Test Ea, Unpackaged shock):
Emissions CISPR 11:
ESD immunity IEC 61000-4-2:
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20…55 °C (-4…131 °F)
55 °C (131 °F)
IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):
-40…85 °C (-40…185 °F)
5…95% noncondensing
5 g @ 10…500 Hz
30 g
50 g
Group 1, Class A (with appropriate enclosure)
6 kV contact discharges
8 kV air discharges
Publication 1794-IN037E-EN-P - November 2011
Environmental Specifications
Radiated RF immunity IEC 61000-4-3:
EFT/B immunity IEC 61000-4-4:
Surge transient immunity IEC 61000-4-5:
Conducted RF immunity IEC 61000-4-6:
Enclosure type rating None (open-style)
10V/m with 1 kHz sine-wave 80% AM fr om 80…2000 MHz
10V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz
10V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz
3V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz
±2 kV @ 5 kHz on power ports
±2 kV @ 5 kHz on shielded signal ports
±1 kV line-line(DM) and ±2 kV line-earth(CM) on power ports
±2 kV line-earth(CM) on shielded signal ports
10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz
Certifications (when product is marked)
Attribute Value
c-UL-us UL Listed Industrial Control Equipment, certified for US and Canada. See UL
CSA CSA Certified Process Control Equipment. See CSA File LR54689C.
Ex European Union 94/9/EC ATEX Directive, compliant with:
CE European Union 2004/108/EC EMC Di rective, compliant with:
C-Tick Australian Radiocommunications Act complia nt with:
TÜV
(1)
For the latest up-to-date information, see the Product Certification link at www.ab.com for Declarations of
Conformity, Certificates and other certification details.
(2)
When used with specified firmware revisions.
File E65584.
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified
for U.S. and Canada. See UL File E194810.
CSA Certified Process Control Equipment for Class I , Division 2 Group A,B,C,D
Hazardous Locations. See CSA File LR69960C.
EN 60079-15; Potentially Explosive Atmospher es, Protection "n"
EN 60079-0; General Requirements
II 3 G Ex nA IIC T4 X
EN 61326-1; Meas./Control/Lab., Ind ustrial Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissi ons
EN 61131-2; Programmable Controllers (Clau se 8, Zone A & B)
European Union 2006/95/EC LVD, compliant with:
EN 61131-2; Programmable Controllers (Clau se 11
AS/NZS CISPR 11, Industrial Emissions
TÜV Certified for Functional Safety
Capable of SIL 2
(1)
(2)
:
Allen-Bradley, Rockwell Automation, FLEX, and TechConnect are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies.
Publication 1794-IN037E-EN-P - November 2011 5 PN-126014
Supersedes publication 1794-IN037D- EN-P - August 2005 Copyright © 2011 Rockwell Automation, Inc. All rights reserved.
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