YOKOGAWA YS80 Series User manual

User’s
Manual
IM 01B04K03-02E
Model SDAU (Style R)
Digital Alarm Unit
IM 01B04K03-02E
8th Edition

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IM 01B04K03-02E
8th Edition: Jan.29,2021-00
CONTENTS
1. INTRODUCTION .................................................................................. 1-1
1.1 Inspection .............................................................................................1-2
1.2 Documentation Conventions...............................................................1-3
1.3 Notice ....................................................................................................1-4
1.4 About Compatibility with the Conventional Model (Style E) .............1-6
2. GENERAL............................................................................................. 2-1
2.1 Standard Specifications.......................................................................2-2
2.2 Model and Suffix Codes .............................................................................2-3
2.3 Accessory......................................................................................................2-4
3. INSTALLATION .................................................................................... 3-1
3.1 External Wiring .....................................................................................3-1
4. FUNCTIONS......................................................................................... 4-1
4.1 Operation Principle ..............................................................................4-1
4.1.1 Hardware Block Diagram ...........................................................4-1
4.2 Input Processing Function ..................................................................4-3
4.3 Alarm Processing Function .................................................................4-5
4.3.1 Alarm-Detecting Sections ..........................................................4-6
4.3.2 Alarm Connection / Output Sections ..........................................4-7
4.3.3 Example of Setting the Alarm Functions ..................................4-10
4.4 Retransmission Output Function (for /VLT and /CUR Options) ......4-11
4.5 Communication Function (for /COM Option)....................................4-12
4.6 Function of Recovery from Power Failure ........................................4-13
4.7 Self-Diagnostic Function ...................................................................4-14
4.8 Alarm/Failure Outputs at Power-on and Power Failure....................4-15
5. SETTING............................................................................................... 5-1
5.1 Names of Components.........................................................................5-3
5.2 Part Names of the Display Setter.........................................................5-4
5.3 Setting Jumpers ...................................................................................5-6
5.3.1 Checking Setting Jumpers and their Locations...........................5-7
5.3.2 Change of Setting Jumper .........................................................5-8
5.4 Settings Done from the Front Panel of the Alarm Unit.......................5-9
5.4.1 How to Operate the Key Switches..............................................5-9
5.4.2 Settings Using Key Switches (Example) ..................................5-10
Model SDAU (Style R)
Digital Alarm Unit
IM 01B04K03-02E 8th Edition

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5.5 Parameter Change Disable Function.................................................5-11
5.6 Various Display Modes ......................................................................5-12
5.6.1 Display at Power ON ...............................................................5-12
5.6.2 LOCK Display..........................................................................5-12
5.6.3 Display in Display Shutoff Mode ..............................................5-12
5.6.4 Error Display............................................................................5-13
5.6.5 Display of Self-Diagnostic Results ...........................................5-13
5.6.6 Detailed Alarm Status Display ..................................................5-14
5.7 Settings Using the JHT200 Handy Terminal .....................................5-16
5.8 Settings Using a PC (VJ77)................................................................5-17
6. PARAMETERS ..................................................................................... 6-1
6.1 Configuration of Parameters ...............................................................6-1
6.2 Display on Front Panel: Development View of Parameters ...............6-2
6.3 Display on Front Panel: List of Parameters ........................................6-6
6.4 BRAIN Communication: List of Parameters......................................6-22
7. MAINTENANCE ................................................................................... 7-1
7.1 Test Equipments...................................................................................7-1
7.2 Reference Table of Thermocouple and RTD.......................................7-1
7.3 Adjustment and Check.........................................................................7-1
7.3.1 Input Adjustment........................................................................7-2
7.3.2 Correction of Input Wiring Resistance........................................7-4
7.4 Check of Reference Junction Temperature Compensation Action....7-6
7.5 List of Replaceable Parts .....................................................................7-7
8. TROUBLESHOOTING ........................................................................ 8-1
8.1 Actions under Fault Conditions ..........................................................8-2
9. POWER SUPPLY TERMINAL CONNECTINS (Options /TB, /TB/A2
and /REK) ...................................................................................... 9-1
9.1 Names of Components and Power Terminal Symbols.......................9-2
9.2 Power Supply and Ground Wiring ......................................................9-3
General Specifications
Revision Information

<1. INTRODUCTION >
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IM 01B04K03-02E
8th Edition: Jan.29,2021-00
1. INTRODUCTION
This manual describes the functions and operations of the SDAU Digital Alarm
Unit.
Intended Readers
This manual is intended for personnel in charge of:
Installation and wiring
Instrumentation and setup of functions
Operation and monitoring of the controller
Maintenance of equipment
Related Documents
The following documents all relate to the SDAU Digital Alarm Unit. Read them as
necessary. The codes enclosed in parentheses are the document numbers.
•Rack-Mounted Instruments (IM 1B4F2-01E)
Describes mounting and wiring for YS80 rack-mounted instruments.
•Model VJ77 PC-based Parameters Setting Tool (IM 77J01J77-01E)
Describes operation of the VJ77 parameters setting tool.
•Model JHT200 Handy Terminal (IM 77J50H01-01EN)
Describes operation of JHT200.
•YS80*R Rack-Mounted Instruments Communication Functions
Describes the communication functions of SDAU. (IM 01B04F01-20E)

<1. INTRODUCTION >
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8th Edition: Jan.29,2021-00
1.1 Inspection
The SDAU digital alarm unit is shipped only after stringent inspection at the factory.
Visually inspect the product upon delivery to make sure it is not damaged in any way.
Store the box and inner packing material of the package in a safe place / they may be
needed if there is a problem with the product and it needs to be sent back for repair.
Check of Model and Suffix Codes
The model and suffix codes are indicated on the Name plate attached to the front cover
of the instrument. Crosscheck this information with the model and suffix codes of
Section 2.2 to ensure that the product is as specified in the order.
Figure1.1 Appearance and Name plate (Description example)
Confirmation of the Package Contents
Check the package contents against the list below. If anything is missing or damaged,
immediately contact the sales office from which you purchased the product or your
nearest Yokogawa representative.
•SDAU Digital Alarm Unit................................................................................. 1
•Reference Junction Bracket (Parts No.: L4040EN)
(only for SDAU-120-xx*R/NHR or SDAU-270-xx*R/NHR)............................. 1
•Alarm Label (Parts No.: L4040JA).................................................................. 1 sheet
•Precautions on the Use of the YS80 Series.................................................... 1
Downloadable Electronic Manuals
You can download the latest manuals from the following website:
To view the User’s Manuals, use Adobe Acrobat Reader of Adobe Systems Incorporated.
http://www.yokogawa.com/ns/ys/

<1. INTRODUCTION >
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1.2 Documentation Conventions
This manual uses the following notational conventions.
Symbols
The following symbols are used in this manual.
Indicates that operating the hardware or software in a particular manner may damage it
or result in a system failure.
Draws attention to information that is essential for understanding the operation and/or
features of the product.
TIP
Gives additional information to complement the present topic and/or describes terms
specific to this document.
See Also
Gives reference locations for further information on the topic.
Description of Displays
Some of the representations of product displays shown in this manual may be
exaggerated, simplified, or partially omitted for reasons of convenience when explaining
them.
QR Code
The product has a QR Code pasted for efficient plant maintenance work and asset
information management. It enables confirming the specifications of purchased products
and user’s manuals.
For more details, please refer to the following URL.
https://www.yokogawa.com/qr-code
QR Code is a registered trademark of DENSO WAVE INCORPORATED.

<1. INTRODUCTION >
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1.3 Notice
This User’s Manual
This manual should be passed on to the end user. Keep at least one extra copy of
the manual in a safe place.
Read this manual carefully to gain a thorough understanding of how to operate this
product before you start using it.
This manual is intended to describe the functions of this product. Yokogawa Electric
Corporation (hereinafter simply referred to as Yokogawa) does not guarantee that
these functions are suited to the particular purpose of the user.
Under absolutely no circumstances may the contents of this manual, in part or in
whole, be transcribed or copied without permission.
The contents of this manual are subject to change without prior notice.
Every effort has been made to ensure accuracy in the preparation of this manual.
Should any errors or omissions come to your attention however, please contact your
nearest Yokogawa representative or sales office.
Protection, Safety, and Prohibition against Unauthorized Modification
The following safety symbols are used on the product and in this manual.
If this symbol is indicated on the product, the operator should refer to the explanation
given in the user’s manual in order to avoid personal injury or death to either
themselves or other personnel, and/or damage to the instrument. The manual
describes that the operator should exercise special care to avoid shock or other
dangers that may result in injury or loss of life.
Protective ground terminal:
This symbol indicates that the terminal must be connected to ground prior to
operating the equipment.
Function ground terminal:
This symbol indicates that the terminal must be connected to ground prior to
operating the equipment.
AC voltage:
This symbol indicates that AC voltage is present.
DC voltage:
This symbol indicates that DC voltage is present.

<1. INTRODUCTION >
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In order to protect the product and the system controlled by it against damage and
ensure its safe use, make certain that all of the instructions and precautions relating
to safety contained in this document are strictly adhered to. Yokogawa does not
guarantee safety if products are not handled according to these instructions.
If protection/safety circuits are to be used for the product or the system controlled by
it, they should be externally installed on the product.
Do not turn off the power of the product during adjustment.
When you replace the parts or consumables of the product, only use those specified
by Yokogawa.
Do not modify the product.
Force Majeure
Yokogawa does not make any warranties regarding the product except those
mentioned in the WARRANTY that is provided separately.
Yokogawa assumes no liability to any party for any loss or damage, direct or
indirect, caused by the use or any unpredictable defect of the product.

<1. INTRODUCTION >
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1.4 About Compatibility with the Conventional
Model (Style E)
The operation and function differ from the conventional model.
Read this manual carefully to gain a thorough understanding of how to operate this
product before you start using it.
Be sure to confirm the parameters such as alarm set point and setting jumper
referring to ''6. PARAMETERS'' before installing the product in a system or plant.
After confirming them, install the product in a system or plant and turn on the power.
When replacing an internal unit with the old style code (SDAU-1xx-xx*E) with an
internal unit with the SDAU-120-xx*R or SDAU-270-UN*R style code, the reference
junction contact fitting (for contact with the RJC sensor) must be installed (or
replaced). For more information, see Section 2.3, “Accessory.”

<2. GENERAL>
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8th Edition: Jan.29,2021-00
2. GENERAL
The SDAU Digital Alarm Unit accepts two input signals (freely selectable from 1 to
5 V, mV, thermocouple, and RTD), and six detection results present in alarm-
detecting sections are freely AND-connected or OR-connected. These results are
then output to alarm relays (two points, or four points if the optional suffix is
specified).
Each alarm-detecting section detects high limit and low limit alarms of an input
absolute value, input rate-of-change, and two-input deviation. Either a normally
energized or de-energized state is selectable for alarm output relays.
The digital display and key switches on the front panel allow input values to be
displayed and parameters such as alarm setpoints to be set or changed.
Parameters can also be set or changed by using a PC (VJ77) or the JHT200 Handy
Terminal*1.
The self-diagnostic function also allows failure outputs to be generated.
With the VJ77 Parameter Setting Tool you can do the following:
· Read/write all parameters at once
· Save read parameters to a file
· Copy parameters to other devices of the same model and suffix code.
*1: The BT200 BRAIN Terminal of Yokogawa Electric Corporation can also be connected.
Modular jack adapter (part no.: E9786WH) is required to connect a PC (VJ77), the JHT200 Handy Terminal or BT200
to the Digital Alarm Unit.
Figure 2.1 Appearance of the SDAU Digital Alarm Unit

<2. GENERAL>
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2.1 Standard Specifications
Please see the General Specifications (GS 01B04K03-02E) at the end of this manual.

<2. GENERAL>
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2.2 Model and Suffix Codes
The following table shows the SDAU model and suffix codes.
Table 2.1 Model and Suffix Codes
Model
Suffix Codes
Optional Suffix Codes
Description
SDAU
Digital Alarm Unit
Input Signal 2
-1
Input signal 2: 1 to 5 V
-2
Input signal 2: Universal (Note 3)
Input Signal 1
0
1 to 5 V
1
mV
2
TC (Thermocouple)
3
RTD
7
Universal (Note 3)
Always 0
0
Always 0
Auxiliary Codes
Available Combination
Standard Specifications:
SDAU-100, SDAU-110
SDAU-120, SDAU-130
SDAU-270
Auxiliary Codes:
SDAU-100: -SV
SDAU-110: -MV
SDAU-120: from -TK to -TS
SDAU-130: from -PA to -PD
SDAU-270: -UN
-SV
Two points of 1 to 5 V inputs
-MV
mV input
-TK
Type K (ITS-90,JIS’95)
-TT
Type T (ITS-90,JIS’95)
-TJ
Type J (ITS-90,JIS’95)
-TE
Type E (ITS-90,JIS’95)
-TB
Type B (ITS-90,JIS’95)
-TR
Type R (ITS-90,JIS’95)
-TS
Type S (ITS-90,JIS’95)
-PA
JPt 100 (JIS’89)
-PB
Pt50 (JIS ’81)
-PD
Pt100 (ITS-90, JIS’97)
-UN
Universal (Note 3)
Style Code
*R
Style R
Common Options
/A2ER
220 V version power supply plug
/TB/A2
220 V version power supply terminal (Note 4)
/NHR
W ithout case
/FBP
Power supply fuse bypass
/LOCK
Power supply plug with lock
/WSW
With spring washer
/REK
Mount to same line with EK series rack
/TB
With power supply terminal
/VLT
With 1 to 5 V output (Note 1)
/CUR
With 4 to 20 mA output (Note 1)
/RLY4
Four points of alarm outputs (Note 1)
/COM
With RS-485 communication function
/BU
Burnout upscale (Note 2)
/BD
Burnout downscale (Note 2)
Note 1: /VLT, and /CUR options can be combined with only –UN auxiliary code.
/RLY4 option can be combined with only –SV or –UN auxiliary codes.
/VLT, /CUR and RLY4 options can not be combined with each other.
Note 2: For two points of 1 to 5 V inputs (-SV), burnout upscale or burnout downscale is not selectable.
Note 3: For universal inputs, 1 to 5 V is not selectable.
Note 4: Specify the option codes /TB and /A2 at the same time.

<2. GENERAL>
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2.3 Accessory
Reference junction bracket : 1
(For SDAU-120-xx*R/NHR or SDAU-270-xx*R/NHR)
Alarm label : 1
Figure 2.2 Location of the Reference Junction Bracket
CAUTION
• Notice when replacing the internal unit of a conventional model:
When replacing the internal unit of a conventional model (SDAU-1xx-xx*E) with that of SDAU-
120-xx*R or SDAU-270-UN*R, a reference junction bracket (for connection to the RJC sensor)
needs to be installed (replaced).
For SDAU-120-xx*E
Replace a reference junction bracket (for connection to the RJC sensor).
For models other than SDAU-120-xx*E
Install a reference junction bracket (for connection to the RJC sensor).

<3. INSTALLATION>
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8th Edition: Jan.29,2021-00
3. INSTALLATION
For details of the installation procedure and wiring precautions, refer to the
instruction manual “Installation of Rack-Mounted Instruments” (IM 1B4F2-01E).
3.1 External Wiring
(a) All cable ends must be furnished with crimp-on type solderless lugs (for 4mm
screws).
(b) Draw out the internal unit from the rack case.
(c) Connect the cable to the correct terminals referring to Figure 3.1.
(d) Return the internal unit into the rack case after completing the wiring.
(e) Always return the terminal block cover to its original position after completing the
wiring.
CAUTION
The terminal block cover cannot be returned to its original position if the internal unit is not installed
correctly inside in the rack case. Securely return the terminal block cover because it also functions as
lock for the internal unit.
Alarm output 2
Alarm output 1
Failure output
1 to 5 V, mV, TC Input RTD Input
*1: Terminal for connecting the reference junction bracket.
*2: Switch NC/NO using jumper.
NC: Relay normally closed contact (closed when relay de-energized).
NO: Relay normally open contact (open when relay de-energized).
Terminal
Designation
Description
Excluding /RLY4, /VLT and /CUR /RLY4 /VLT or /CUR
Alarm output 1
Retransmission output
1 to 5 V or 4 to 20 mA
Alarm output 2
Alarm output 1
Alarm output 4
Alarm output 2
Alarm output 3
Input 1
Input 2
Input 1
Input 2
ACF
BDH
JK
135
246
78
A
B
C
D
F
H
J
K
NC
COM
NC,NO
COM
NC
COM
NO
NO
NC,NO
COM
NC,NO
COM
NC,NO
COM
COM
NC,NO
NC
COM
＋
－
NC
COM
NO
NO
1
2
3
4
5
6
7
8
＋
－
＋
－
A
B
B
A
B
B
(*1)
(*2)
(*2)
(*2)
(*2)
(*2)
Front view
may differ
according to
device.
Figure 3.1 Terminal Layout and Terminal Wiring

<3. INSTALLATION>
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B＋
A－
COM
Figure 3.2 RS485 Communication Terminal Layout (/COM option)
Applicable Cables
(1) Signal circuit wiring
• Cross-sectional area of the cable conductor: 0.5 to 0.75 mm2
• Examples of applicable cables: Single core PVC insulated flexible cable (VSF)
stranded wires (JIS C 3306);
heat-resistant vinyl-insulated cable (UL style 1007)
(2) Alarm circuit wiring
• Cross-sectional area of the cable conductor: 0.5 to 1.25 mm2
• Examples of applicable cables: 600 V PVC insulated cable (IV) stranded wires (JIS
C 3307);
PVC insulated cable for electric appliances (KIV)
stranded wires (JIS C 3316);
heat-resistant vinyl-insulated cable (UL style 1007)
(3) Power supply wiring
• Cross-sectional area of the cable conductor: 1.25 to 2.00 mm2
• Examples of applicable cables: 600 V PVC insulated cable (IV) stranded wires
(JIS C 3307)

<4. FUNCTIONS >
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4. FUNCTIONS
4.1 Operation Principle
Input signals are converted into digital data by an A/D converter circuit. This digital data
is signal processed (such as linearization or square root extraction) by a microprocessor
and then computed for alarm detection. Alarm relays are energized or de-energized
according to the alarm computation outputs.
For retransmission output, an input signal is pulse-width modulated after being signal
processed. It is then converted into 1 to 5 V DC or 4 to 20 mA DC signals via a photo-
isolation circuit.
4.1.1 Hardware Block Diagram
Figure 4.1 Hardware Block Diagram

<4. FUNCTIONS >
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Internal Function Block Diagram
The following shows the internal function block diagram. For more information, see the
Description of Each Function section.
/RLY4
Input 1 Input 2
Input
processing
PV1
Input
processing
PV2
Alarm detection processing
Alarm connection/output processing
Alarm
output 1
Alarm
output 2
Alarm
output 3
Alarm
output 4
Retransmission
output
Retransmission
output
processing
Failure output
Terminal
symbol name
Parameter
displayed
/VLT,/CUR
When /RLY4,/VLT,or
/CUR is not specified
Self-
diagnosis
Figure 4.2 Internal Function Block Diagram

<4. FUNCTIONS >
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4.2 Input Processing Function
Two input points are provided. The following processing is done with respect to each
input (see Figure 4.3). Encircled symbols are parameter symbols appearing on the
display setter. "n" takes value 1 or 2.
Figure 4.3 Input Processing Function Block Diagram
Description of Each Function:
•A/D conversion: Performs A/D conversion of input signals.
•Burnout (B.OUT): If an input signal is mV, thermocouple, or RTD input, the action to
be taken in case of burnout can be set. (This can be specified according to an
option code. Settings can be changed via a PC (VJ77) or the JHT200 Handy
Terminal after delivery.)
•Temperature unit conversion (UNITn): Allows temperature units (°C, K or °F) to be
set if an input signal is thermocouple or RTD input.

<4. FUNCTIONS >
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•Input range (RHn, RLn): An input range should be set if an input signal is mV or
temperature input. If an input value is -6.25% or less, or greater than 106.25% of the
input range, an input overrange occurs. For actions to be taken in the event of an
input overrange, see Section 8.2, "Actions under Fault Conditions."
•Square root extraction (SQRn, L.CUTn): If an input signal is 1 to 5 V DC, the
availability of square root extraction and a low-level cutoff point can be specified.
Specification of a low-level cutoff point is enabled only when square root extraction
is available. For inputs below the low-level cutoff point, no square root is extracted.
(Linear characteristics apply for any inputs below the low-level cutoff point.)
•Filter (Fn): This is a first-order lag filter. The time constant can be set in the range of
0.0 to 200.0 seconds. Note that for the actual time constant, a hardware filter time
constant of approx. 0.1 second will be added to the noted setting.
•Scaling (DPn, SCHn, SCLn): If an input signal is mV or 1 to 5 V DC, scaling can be
applied to a range specified by the input range (RHn, RLn). A value converted by
scaling (a value obtained by adding bias to this value if bias is used) becomes PVn.
The initial value of scaling is 0.0 to 100.0 (DPn=1, SCHn=100.0, SCLn=0.0).
<How to Set Input Range and Scaling>
The following is the example when input range of 10.0 to 80.0 mV is scaled to 1000 to
20000.
(1) Set the input range at the parameters RL1 and RH1.
(Example: RL1=10.0, RH1=80.0)
(2) Set the input decimal point position matched to the unit system actually in use at
DP1.
(Example: DP1=0)
(3) Set the scale range at the parameters SCH1 and SCL1.
(Example: SCL1=20000, SCH1=1000)
(Example)
0.0 mV (RL1) 100.0 mV (RH1)
Default input range
0.0 (SCL1) 100.0 (SCH1)
Default scale
10.0 mV (RL1) 80.0 mV (RH1)
Measuring input range
1000 (SCL1) 20000 (SCH1)
Measuring scale
Decimal point position registered at DP1.
Figure 4.4 Scaling
Note: Reverse scaling (SCH1 < SCL1) is also possible.
The alarm unit will not operate normally when SCH1 is set to equal SCL1. Change the setting.
•Bias (BIASn):
A bias value can be added to scaling values.
This allows error to be compensated when there is an error between the input value
and the indicated value.
Bias can be set within the range ±10% [(SCH1 - SCL1) x 0.1] of the scaling width.
•PVn:
The value obtained by adding bias to the scaling value.