Teac TD-SC1 User manual

D01389305A
Z
Load Cell Signal Conditioner
Instructions for Use
TD-SC1

2
Thank you for purchasing the TD-SC1 Load Cell Signal
Conditioner.
Please read this document in its entirety before using the
product to get the best performance and ensure safe and
proper operation.
In this manual, “this unit” or “TD-SC1” is used when referring to
both TD-SC1 (D/A) and TD-SC1 (485) models.
TD-SC1 (D/A) shows it has D/A, and TD-SC1 (485) shows it has
RS-485.
Features
oSupport for TEDS sensors makes calibration easy. Automatic
calibration is also possible when a TEDS sensor is connected.
oAn equivalent input function is included, making sensitivity
adjustment without actual loads easy.
oSupports remote sense functions. Even using long cables
measurement is possible without losing precision.
oStatic strain measurement is possible. Identifying load cell
defects and other problems through plastic deformity is
easy.
oSupports high and low limit comparison functions.
oSupports hold functions, including peak hold, bottom hold
and holds with zone designations.
oAttaches to common DIN rails.
oProduct complies with RoHS.
Included accessories
If anything is missing or damaged, contact us. (For contact
information, see the last page.)
Input/output connector plug
B2CF 3.50/18/180LR SN OR BX 1
Micro USB-B cable 1
Power input terminal bank cover (pre-installed on unit) 1
The following additional accessories are included with the
TD-SC1 (D/A).
KEC-NS0604-02 D/A terminal bank 1
D/A terminal bank cover 1
The following additional accessories are included with the
TD-SC1 (485).
KEC-NS0604-02 terminal bank for RS-485 1
RS-485 terminal bank cover 1
Disclaimers
Information is given about products in this manual only
for the purpose of example and does not indicate any
guarantees against infringements of third-party intellectual
property rights and other rights related to them. TEAC
Corporation will bear no responsibility for infringements on
third-party intellectual property rights or their occurrence
because of the use of these products.
Introduction
Company names and product names in this document are the
trademarks or registered trademarks of their respective owners.

3
Safety information
This document describes the safety instructions for the operation of this unit. Before operating the product, read this document care-
fully to familiarize yourself with the unit.
WARNING Follow the instructions below to avoid risk of serious
personal injury and death.
Never use beyond the rated specifications as there is the danger of property damage, injury, fire or electrical shock.
Never use in flammable gaseous environments including the following locations as there is the danger of explosion.
oLocations containing corrosive or flammable gases
oLocations near water, oil or subject to chemical splash
If this product malfunctions (smells strange or becomes hot), stop using it immediately and unplug the power cord as there is
danger of fire or electrical shock.
Never attempt to disassemble the product.
Carefully check connections and wiring before applying power.
Be sure to ground the product (with ground resistance of 100 or less).
To allow the operator to immediately shut off the power to the product, install a switch or circuit breaker that complies with both
IEC60947-1 and IEC60947-3 requirements near the product. The switch or breaker installed must also indicate that it functions to
shut off the power to the unit.
Do not allow foreign objects such as metal fragments that result from cutting panels, wires or other materials to enter this unit.
If the unit is dropped or subject to strong impacts, it could break. If this occurs, stop using it and contact the seller from which
you purchased it.
Overvoltage category: I
Pollution degree: 2
If the unit is used in a manner not specified by the manufacturer, the protection provided by the unit may be impaired.

4
CAUTION Follow the instructions below to avoid risk of
personal injury or property damage.
Disconnect the power cord when performing the following.
oWhen wiring or connecting cables to the terminal banks for connecting the DC power supply, load cells and external inputs
and outputs
oWhen connecting the ground line
Wait for at least five seconds between turning the unit on and off.
Never touch the connectors while the product is turned on.
When connecting to a power supply, frame ground, signal input/output connector or D/A or RS-485 terminal bank, be sure to
wire them correctly after confirming the signal names and pin assignment numbers. Use shielded cables for signal input/output
cables (load cell, external input/output).
Before use, fix the cables separately so that they do not hang to prevent the connectors from being pulled out and to protect the
connectors from unnecessary pressure.
Conduct wiring in a place so that it will not be together or parallel with electrical wiring.
Avoid use in locations like the following.
oNear a power line
oWhere a strong electric or magnetic field is present
oWhere static electricity or noise, (for example, from a relay) is generated
Do not install in the following environments.
oLocations subject to temperatures exceeding the specified ranges for temperature and humidity
oLocations subject to radiant heat from heat sources
oLocations with high salt or iron content
oLocations exposed to dirt and dust
oLocations subject to direct vibration or shock
oLocations subject to severe temperature changes
oOutdoor, or locations with an altitude of higher than 2000 m
oLocations where freezing or condensation might occur
Do not operate a damaged unit.
The unit is classified as an open-type (built-in) device and must be installed inside a control panel.
If the top cover or panel faces become dirty, wipe it gently with a soft cloth that has been slightly dampened with a diluted neu-
tral cleaning fluid and wrung out well. DO NOT use a chemically treated dust cloth, paint thinner, or other flammable solvents.
Using any of them could damage the coating of the product.
If the product is used in a manner unintended by the manufacturer, the user’s safety may be adversely affected.
Always attach the DC power terminal bank cover when an electric current is present.
If subject to electromagnetic waves (from transceivers, mobile phones, amateur wireless transmissions, etc.), use metal pipes for
the wiring or make other countermeasures using shielding.
Safety information

5
Safety information
Model for USA
Supplier’s Declaration of Conformity
Model number: TD-SC1
Trade name: TEAC
Responsible party: TEAC AMERICA,INC.
Address: 10410 Pioneer Blvd. Unit #1, Santa Fe Springs,
California90670, U.S.A.
Telephone number: 1-323-726-0303
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
Information
This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when
the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accor-
dance with the instruction manual, may cause harmful
interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful
interference in which case the user will be required to cor-
rect the interference at his own expense.
CAUTION
Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.
Model for Canada
Innovation, Science and Economic Development Canada’s
Compliance Statement:
This Class A digital apparatus complies with Canadian
ICES-003.
Cet appareil numérique de la classe A est conforme à la
norme NMB-003 du Canada.
Model for Europe
DECLARATION OF CONFORMITY
This product complies with the
European Directives request, and the
other Commission Regulations.
DECLARACIÓN DE CONFORMIDAD
Este producto cumple con las exigencias de las directivas
europeas y con los reglamentos de la Comisión Europea.
DÉCLARATION DE CONFORMITÉ
Ce produit est conforme aux directives européennes et aux
autres réglementations de la Commission européenne.
KONFORMITÄTSERKLÄRUNG
Dieses Produkt entspricht den Anforderungen europäischer
Richtlinien sowie anderen Verordnungen der Kommission.
Model for UK
This product complies with the applicable UK
regulations.
WARNING
This is a Class A product. In a domestic environment, this
product may cause radio interference in which case the
user may be required to take adequate measures.
ATENCIÓN
Este es un producto de clase A. En un entorno no profe-
sional, este aparato puede producir interferencias de radio,
en cuyo caso el usuario será el responsable de tomar las
medidas necesarias para solucionarlo.
AVERTISSEMENT
Il s’agit d’un produit de Classe A. Dans un environnement
domestique, cet appareil peut provoquer des interfé-
rences radio, dans ce cas l’utilisateur peut être amené à
prendre des mesures appropriées.
Warnung
Dies ist eine Einrichtung, welche die Funk-Entstörung nach
Klasse A besitzt. Diese Einrichtung kann im Wohnbereich
Funkstörungen versursachen; in diesem Fall kann vom
Betrieber verlang werden, angemessene Maßnahmen
durchzuführen und dafür aufzukommen.

6
DISCLAIMER
TEAC disclaims all warranty, either expressed or implied,
with respect to this product and the accompanying written
materials. In no event shall TEAC be liable for any damages
whatsoever (including, without limitation, damages for loss of
business profits, business interruption, loss of business infor-
mation or other loss) arising out of the use of or inability to use
this product.
Disposing of this product
When disposing of this product, including accessories, con-
sumable parts and related items, follow the regulations of the
local, regional and national governments.
For European Customers
Disposal of electrical and electronic equipment and
batteries and/or accumulators
a) All electrical/electronic equipment and waste batteries/
accumulators should be disposed of separately from the
municipal waste stream via collection facilities desig-
nated by the government or local authorities.
b) By disposing of electrical/electronic equipment and
waste batteries/accumulators correctly, you will help
save valuable resources and prevent any potential nega-
tive effects on human health and the environment.
c) Improper disposal of waste electrical/electronic equip-
ment and batteries/accumulators can have serious effects
on the environment and human health because of the
presence of hazardous substances in the equipment.
d) The Waste Electrical and Electronic Equipment
(WEEE) symbols, which show wheeled bins
that have been crossed out, indicate that elec-
trical/electronic equipment and batteries/
accumulators must be collected and disposed
of separately from household waste.
If a battery or accumulator contains more
than the specified values of lead (Pb), mer-
cury (Hg), and/or cadmium (Cd) as defined in
the Battery Directive (2006/66/EC, 2013/56/
EU), then the chemical symbols for those ele-
ments will be indicated beneath the WEEE symbol.
e) Return and collection systems are available to end users.
For more detailed information about the disposal of old
electrical/electronic equipment and waste batteries/
accumulators, please contact your city office, waste
disposal service or the shop where you purchased the
equipment.
Pb, Hg, Cd
Safety information

7
Contents
Introduction ..................................................2
Features ...................................................2
Included accessories .......................................2
Safety information ............................................3
1. Names and functions of parts...............................9
1-1. Front...................................................9
1-2.Top .................................................. 10
1-3. Bottom .............................................. 10
2. Installation ............................................... 11
2-1. Attaching to a DIN rail................................ 11
2-2. Removing from a DIN rail............................. 11
3. Making connections ...................................... 12
3-1. Connecting to the input/output connector .......... 12
3-1-1. Input/output connector ........................ 12
3-2. Connecting a strain gauge transducer................ 12
3-2-1. About the remote sense function............... 12
3-2-2.Notes about bridge voltage (excitation voltage)...12
3-3. Control input and output terminals .................. 14
3-3-1. Control input terminals......................... 14
3-3-2. Connecting control input terminals............. 14
3-3-3. Comparison output terminals .................. 15
3-4. Connecting the DC power supply input terminals .... 15
4. Control app .............................................. 16
4-1. App availability ...................................... 16
5. USB ...................................................... 17
5-1. Connections ......................................... 17
5-1-1. USB port ....................................... 17
5-1-2.When using a TD-SC1 (485) ..................... 17
5-2. Commands .......................................... 17
6. RS-485.................................................... 18
6-1. RS-485 overview ..................................... 18
6-2. Connections ......................................... 18
6-2-1. RS-485 terminals ............................... 18
6-2-2. Inserting and removing RS-485 terminal bank .. 18
6-2-3. Connecting the RS-485 terminals ............... 18
6-2-4. Selecting RS-485 transmission .................. 18
6-3. RS-485 transmission settings ......................... 19
6-4.Transmission protocols (TD Format/TD Format (BCC)). 20
6-4-1. Commands..................................... 20
6-4-2. Responses...................................... 21
6-5.Transmission commands ............................. 22
6-5-1. Polling (0001)................................... 22
6-5-2. Status Polling (0002)............................ 23
6-5-3. Indicator Value Polling (0003) ................... 24
6-5-4.Setting value writing/execution command format ..24
6-5-5. Setting value loading command format ........ 25
6-5-6.TEDS command format......................... 25
6-5-7. Continuous transmission format................ 26
6-5-8. Real-time value/hold value format .............. 26
Status .......................................... 26
6-6. Commands .......................................... 27
6-6-1. Execution ...................................... 27
6-6-2. Polling ......................................... 27
6-6-3. Calibration ..................................... 27
6-6-4. Condition settings.............................. 28
6-6-5. Comparison settings ........................... 29
6-6-6. Hold function settings.......................... 30
6-6-7. System settings ................................ 30
6-6-8.TEDS ........................................... 32
7. D/A converter ............................................ 33
7-1. D/A output terminals ................................ 33
7-2. D/A Zero............................................. 33
7-3. D/A Full Scale ........................................ 34
7-4. D/A Output Mode ................................... 34
7-5. D/A Maximum Voltage ............................... 34
8. Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8-1. Procedures shared by all calibration methods ........ 36
8-1-1. Locking and unlocking calibration values ....... 36
8-1-2. Remote Sense .................................. 36
8-2. Equivalent input calibration .......................... 37
8-2-1. Bridge Voltage.................................. 37
8-2-2. Decimal Point Position.......................... 37
8-2-3. Rated Output Value............................. 37
8-2-4. Rated Capacity Value ........................... 37
8-2-5. Zero Balancing ................................. 37
8-2-6. D/A Output Mode .............................. 38
8-2-7. D/A Maximum Voltage ......................... 38
8-2-8. Calibration Value Lock .......................... 38
8-3. Actual load calibration ............................... 38
8-3-1. Bridge Voltage.................................. 39
8-3-2. Decimal Point Position.......................... 39
8-3-3. Zero Balancing ................................. 39
8-3-4. Rated Capacity Value (load calibration).......... 39
8-3-5. D/A Output Mode .............................. 39
8-3-6. D/A Maximum Voltage ......................... 39
8-3-7. D/A Full Scale .................................. 39
8-3-8. Maximum Display Value ........................ 39
8-3-9. Calibration Value Lock .......................... 39

8
Contents
8-4.TEDS calibration...................................... 40
8-4-1.TEDS Calibration................................ 40
8-4-2. Zero Balancing ................................. 40
8-4-3. Calibration Value Lock .......................... 40
8-5. Remote Sense ....................................... 41
8-6. Minimum Scale Selection ............................ 41
8-7. Display Frequency Selection ......................... 41
8-8. Maximum Display Value .............................. 41
8-9. Sensor Input Logic ................................... 41
8-10. Zero Balancing...................................... 41
8-11. Zero Point Input Calibration......................... 41
8-12. Digital Zero ......................................... 41
9. Condition settings ........................................ 42
9-1. Filter ................................................. 42
9-1-1. Low-Pass Filter Selection........................ 42
9-1-2. Moving Average Data Set Size Selection ........ 42
9-1-3. Automatic Digital Filter ......................... 42
9-1-4. Moving Average Data Set Size .................. 42
9-2. Motion Detect ....................................... 43
9-3. Zero tracking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9-4. Digital offset ......................................... 44
9-5. Digital Zero .......................................... 44
9-5-1. Enable Digital Zero ............................. 44
9-5-2. Digital Zero Limit Value ......................... 44
9-5-3. Clear Digital Zero ............................... 44
9-6. Static Strain Display Switching
(static strain display mode) ......................... 44
9-7. Select Data Output................................... 44
10. Comparison settings .................................... 45
10-1. Comparison value settings.......................... 45
10-2. Comparison Pattern Setting......................... 45
10-3. Comparison Mode Setting .......................... 46
10-4. Hysteresis........................................... 47
10-5. Comparison Output Pattern. . . . . . . . . . . . . . . . . . . . . . . . . 48
10-5-1. Standard Output .............................. 48
10-5-2. Area Output................................... 48
10-6. Nearly Zero ......................................... 48
11. Hold function settings................................... 49
11-1. Hold Mode ......................................... 49
11-1-1. Hold value reading ............................ 49
11-1-2. Sample hold .................................. 50
11-1-3. Peak hold ..................................... 51
11-1-3-1. No Zone Definition. . . . . . . . . . . . . . . . . . . . 51
11-1-3-2. Zone Definition used.................. 52
11-1-4. Bottom hold .................................. 53
11-1-4-1. No Zone Definition. . . . . . . . . . . . . . . . . . . . 53
11-1-4-2. Zone Definition used.................. 54
11-2. External Hold Mode................................. 55
11-3. Clear signal ......................................... 55
11-4. Zone Definition ..................................... 55
11-5. Hold Lock........................................... 55
11-6. Auto Zero........................................... 55
12. System settings ......................................... 56
12-1. Setting value memory .............................. 56
12-2. Save All Setting Values .............................. 56
12-3. Device Information ................................. 56
12-4. Lock ................................................ 56
12-4-1. Calibration Value Lock ......................... 56
12-4-2. Setting Value Lock............................. 56
12-4-3. Main Unit Operation Lock ..................... 56
12-5. Device Number ..................................... 56
12-6. Reset ............................................... 56
13.TEDS settings............................................ 57
13-1. Rewrite TEDS Data .................................. 57
13-2. Restore TEDS data .................................. 57
13-3. Read TEDS data ..................................... 57
14. Settings ................................................. 58
14-1. Lock item list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
14-1-1. Calibration .................................... 58
14-1-2. Condition settings ............................ 58
14-1-3. Comparison settings .......................... 58
14-1-4. Hold function settings......................... 59
14-1-5. System settings ............................... 59
14-1-6.TEDS settings ................................. 59
15.Warranty explanation.................................... 60
16. Specifications ........................................... 61
17. External drawings ....................................... 62
18. Block diagram ........................................... 63

9
1. Names and functions of parts
A USB port
Use this for communication with this unit.
ATTENTION
Do not use a USB hub when connecting the USB port
on this unit and a computer. Connect them directly.
B D/A output terminals
C STATUS indicator
Blue Power on
Magenta Input level overload,
command being executed
Blinking blue/magenta Starting up (only immediately
after the power is turned on)
D USB/RS-485 switch
Use this to select the communication method used with
this unit.
E RS-485 terminals
NOTE
Use communications to make settings for this unit. See the
chapter on the communication method being used for details.
1-1. Front
TD-SC1 (D/A) TD-SC1 (485)

10
1. Names and functions of parts
1-2. Top
A Input/output connector
Insert the included input/output connector plug here.
Connect strain gauge transducers, TEDS sensors. control
inputs and comparison outputs.
B CAL button
When Calibration Value Lock is OFF, press and hold to
conduct actual load calibration.
C ZERO button
When Calibration Value Lock is OFF, press and hold to
use the zero balancing function.
NOTE
If Main Unit Operation Lock is ON, the operation buttons (CAL
and ZERO) on the unit will be disabled (page30).
1-3. Bottom
a FG (frame grounding) terminal
Frame grounding terminal for DC power supply.
VAlways be sure to connect the frame grounding
terminal.
b DC power supply input terminals
Connect a DC power supply.
The voltage range is DC 24V ±10%.

11
2. Installation
Follow these procedures to install the unit in a control panel.
2-1. Attaching to a DIN rail
1 Insert the adapter into the DIN rail at an angle to
attach it.
oThe supported DIN rail width is 35mm.
ATTENTION
After attaching the adapter to the DIN rail, confirm that
it is not loose.
2-2. Removing from a DIN rail
Press the unit down so that the lower clasp on the
adapter disconnects from the DIN rail. Then, pull it for-
ward to remove it.

12
3. Making connections
3-1. Connecting to the input/
output connector
A 2-piece type connector is used.
Insert the included input/output connector plug into the
input/output connector.
When wiring the input/output connector plug, press the but-
ton for each pin while inserting the wire.
ATTENTION
Do not connect any connector plug other than one included
because doing so could make it unsafe.
3-1-1.Input/output connector
Plug
Wire insertion hole
Lever
Wire
7–8 mm
1 Remove 7 to 8mm of the covering from the wire
being connected, and twist it so that the tip does
not come apart.
Suitable wiring is 0.14 to 1.5mm2(26–16AWG).
2 While pressing the buttons attached to each pin,
insert the wires into the holes so that the tips do
not come apart.
3 Pull the wire gently to conrm that it is securely
clamped into the hole.
4 After the wires have been connected, press the
plug into the indicator until the levers on both its
sides lock.
3-2. Connecting a strain gauge
transducer
3-2-1.About the remote sense function
Set the Remote Sense setting before connecting the sensor
(page27).
By default, this is set to “Unused (4-wire format)”.
The 6-wire format (remote sense format) is a superior con-
nection method that compensates for reduced voltages due
to cable length and voltage changes due to temperature
changes, for example.
In systems installed outdoors and other situations where
temperature changes are expected, as well as in cases when
general precision is desired, for example, we recommend using
the 6-wire format for remote sense.
ATTENTION
oWhen using a 6-wire format (remote sense format), before
connecting a sensor, always set “Remote Sense” to “Used
(6-wire format)”.
oUse “Unused (4-wire format)”with 4-wire format.
oIncorrect connections or settings could cause damage to
sensors.
3-2-2.Notes about bridge voltage
(excitation voltage)
As a reference for setting the bridge voltage, consider that the
output from the sensor should be increased, and set the max-
imum voltage in a range that does not exceed the maximum
safe excitation voltage on the sensor test report.
A sensor could be damaged if this is set to a value that exceeds
its maximum safe excitation voltage.
ATTENTION
oIf the maximum safe excitation voltage is less than 10V, set
the bridge voltage to 5V before connecting.
oIn TEDS calibration, when TEDS data is read, if the bridge
voltage setting is greater than the maximum excitation volt-
age recorded in the TEDS memory, the bridge voltage will
be changed to a value less than the maximum excitation
voltage.
NOTE
The default value is 5V.

13
Connecting TEDS sensors and 4-wire sensors






-EXC (C)
+EXC (A)
-SIG (B)
+SIG (D)
SHIELD (E)
TEDS
GND

SHIELD (E)

A
B
C
D
Teds Data
Memory
Strain gauge transducer TD-SC1
Connecting using 6-wire format






-EXC (C)
+EXC (A)
-SIG (B)
+SIG (D)
SHIELD (E)
+SENS (F)
-SENS (G)

SHIELD (E)

A
B
C
D
Strain gauge transducer TD-SC1
Usable sensor characteristics
oOutput between +SIG and −SIG: ±5.0mV/V or less
oVoltage (current) between +EXC and −EXC: 5 or 10V DC
±10% (30mA maximum current)
ATTENTION
Do not connect sensors that do not meet the rated output
(output between +SIG and −SIG) and the maximum safe exci-
tation voltage (voltage between +EXC and −EXC) specifications.
NOTE
If not using the TEDS function, terminals 1 and 2 can be left open.
Terminal
number Signal Wire color
1 TEDS Orange
2 GND Green
3 +EXC (A) Red
4 +SENS (F) −
5 −SIG (B) Black
6 −EXC (C) Blue
7 −SENS(G) −
8 +SIG (D) White
9/10 SHIELD (E) Yellow
oThe wire colors are those that we use in the strain gauge
transducers that we make.
oTEDS and remote sense (SENS) can be used at the same
time.
3. Making connections

14
3-3. Control input and output
terminals
3-3-1.Control input terminals
Terminal
number Signal Explanation
11 D/Z
Sets the indicator value digitally to 0.
oMaintain the ON state for more
than 30msec.
This is active when Enable Digital
Zero is set to ON.
12 Hold
Holds function using hold start sig-
nals when this is ON.
This becomes disabled if the Hold
Mode is set to “OFF”.
13 Clear
This turns on when a hold is cleared
in any hold mode except sample
hold.
Whether Clear signals are enabled or
disabled can be set using the Clear
signal setting.
17 +(+24V) DC24V power supply input terminal
18 −(0V)
This is the 0V terminal for DC24V
power supply and the control input
signal common terminal.
oWhen using a control input connector, a separate DC24V
power supply is necessary for the control input circuit.
oThe control input signal is isolated from the unit’s circuits by
a photocoupler.
VCAUTION
For terminals 17 and 18, use a power supply that conforms to
the limited energy circuit specification in IEC61010-1. Failure to
do so could cause fire or other hazards.
3-3-2.Connecting control input
terminals
Signals are input with the external input circuit when shorted
or opened between any control input terminal and the com-
mon terminal.
Shorts occur from both contact and non-contact (transistor).
9FF
 í9
 9
TD-SC1
External
power supply
DC +24V
PUSH switch
About 2mA
Example when contact signal used
Example when transistor used
oWhen external contact is ON, about 2 mA flows. When
using a transistor, for example, select one with a resistance
of at least 10V and elements that allow a flow of at least
40mA when on.
o18 −(0V) is the common terminal for the 11 IN (D/Z), 12 IN
(Hold) and 13 IN (Clear) control input terminals.
oDo not apply voltage from an external source to a control
input terminal.
3. Making connections

15
3-3-3.Comparison output terminals
Terminal
number Signal Explanation
14 HI High limit judgment output
15 LO Low limit judgment output
16 OK OK judgment output
18 −(0V) Comparison output common
terminal
oThe comparison output is isolated from the unit’s circuits by
a photocoupler.
Open collector output (NPN, current sync)
20mA/30V maximum collector current
+5V
18 −(0V)
1416 judgment
output
20mA/30V
maximum
oFor the operation of each signal, see “10. Comparison set-
tings” on page45.
3-4. Connecting the DC power
supply input terminals
The DC power supply input voltage should be 24V ±10%.
Use a power supply cord that is 0.517 to 2.081mm2(20 to
14AWG).
When connecting to the terminal bank, use a solderless termi-
nal (M3, width of 6mm or less).
+
–
FG
ATTENTION
oIf using the unit as a CE compliant product, the power cord
must be no more than 3m long.
oAllow the unit to warm up for at least five minutes after
supplying power to it.
oThe recommended tightening torque for terminals is 0.5N·m
(5.1kgf-cm).
VAlways attach the cover to the power supply input
terminal bank. Failure to do so could result in fire,
electric shock or malfunction.
VUse a power supply that conforms to a limited energy
circuit as specified in IEC61010-1. Failure to do so
could cause fire or other hazards.
3. Making connections

16
4.Control app
Use communications to make settings for this unit. See the
chapter on the communication method being used for details.
A control app that makes the unit’s settings easy is available.
Use this control app to make the unit’s settings if you are not
making your own control app for the unit.
oYou can download and use the app for free (Japanese version
only).
4-1. App availability
This app is only available in Japanese at the moment.
https://loadcell.jp/

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5. USB
In this chapter we explain the USB functions of the TD-SC1.
5-1. Connections
5-1-1.USB port
USB micro-B port
Example of connection with a computer
micro-B port
USB cable Computer
ATTENTION
Do not use a USB hub when connecting the USB port
on this unit and a computer. Connect them directly.
5-1-2.When using a TD-SC1 (485)
To use the USB of the TD-SC1 (485) for transmission, slide the
USB/RS-485 switch down.
5-2. Commands
These are the same as the RS-485 settings (excluding the
RS-485 Transmission Settings List).
See the sections starting with “6-4. Transmission protocols (TD
Format/TD Format (BCC))”on page20.

18
6.RS-485
In this chapter we explain the RS-485 functions of the TD-SC1 (485).
6-1. RS-485 overview
Format: RS-485 two-wire type
Transmission format: start-stop synchronization, half-duplex
transmission
Number of connected units: 32 maximum (including master)
Code: ASCII
6-2. Connections
6-2-1.RS-485 terminals
USB/RS-485 switch
RS-485 terminals
Signal name Explanation
A+ Data (not reversed)
B− Data (reversed)
TRM
Terminator
(by shorting B− and TRM, it can be used as a
terminator (110)
SG Connection line
6-2-2.Inserting and removing RS-485
terminal bank
oYou can remove the terminal bank from the main unit by
loosening the two black screws at the ends of the terminal
bank and pulling it out.
oAlways disconnect the power before removing or installing
a terminal bank.
6-2-3.Connecting the RS-485 terminals
oWe recommend using twisted-pair cables for connections.
oIf these units will be used at both ends, short the B- and
TRM terminals. (This will enable termination.)
oAlways disconnect the power before working with wiring.
oThe recommended torque for the RS-485 terminal screws
and attachment screws is 0.69 N·m ≈ 7 kgf·cm.
oAfter wiring, attach the terminal bank cover.
CAUTION
For the RS-485 connector, use the included KEC-NS0604-02.
Do not use any other connector because doing so could make
it unsafe.
6-2-4.Selecting RS-485 transmission
To use this unit with RS-485 for transmission, slide the USB/
RS-485 switch up.
oAlways disconnect the power before moving the switch.

19
6. RS-485
6-3. RS-485 transmission settings
RS-485 setting items are added to the TD-SC1 (485).
Setting Format Default value Options
Communication
Mode
Selection TD Format
(BCC)
TD Format
TD Format (BCC)
Continuous
Transmission
ID Number Input 1 1 to 31
Baud Rate Selection 115200 4800
9600
19200
38400
57600
115200
Bit Length Selection 8-bit 8-bit
7-bit
Parity Bit Selection None None
Odd
Even
Stop Bit Selection 1-bit 1-bit
2-bit
Delimiter Selection CR + LF CR + LF
CR
oRS-485 transmission settings can only be read and written
when connected by USB. When connected by RS-485, they
can only be read. (RS-485 transmission settings cannot be
changed when connected by RS-485.)
oAfter changing RS-485 settings, restart the unit.
Communication Mode
Select the RS-485 transmission protocol.
TD Format This transmission protocol is unique to
the TD-SC1.
TD Format (BCC) This transmission protocol adds check-
sum (BCC) to the TD format.
Continuous
Transmission
This continuously transmits TD Format
polling command (0001) data.
ID Number
This can be set between 1 and 31. Set so it does not overlap
with the IDs of other stations.
Baud Rate
Set the transmission speed for RS-485 communication.
Bit Length
Set according to the transmission requirements of connected
equipment.
Parity Bit
Set according to the transmission requirements of connected
equipment.
Stop Bit
Set according to the transmission requirements of connected
equipment.
Delimiter
Set according to the transmission requirements of connected
equipment.

20
6. RS-485
6-4. Transmission protocols (TD Format/TD Format (BCC))
TD Format does not use checksums.
TD Format (BCC) adds checksums after data.
6-4-1.Commands
TD Format
HEX 0x23 0×30 0×31 0x33 0x30 0×30 0×32 0x2D 0x30 0×31 0×38 0×30 0×30 0×0D
ASCII # 0 1 3 0 0 2 − 0 1 8 0 0 CR
ID number Command No. Data
TD Format (BCC)
HEX 0x23 0×30 0×31 0x33 0x30 0×30 0×32 0x2D 0x30 0×31 0×38 0×30 0×30 0×34 0x43 0x0D
ASCII # 0 1 3 0 0 2 − 0 1 8 0 0 4 C CR
ID number Command No. Data
Checksum
The first character in the command must always be “#”.
The final characters must be “CR”.
The data length will be 0 to 6 characters according to the command.
The checksum (BCC) adds each byte of the ID number, command and data and divides the lower 8 bits into upper and lower parts of
4 bits each and saves them in ASCII as the checksum.
In the example above, the total of the ID number, command and data is as follows.
0x30+0x31+0x33+0x30+0x30+0x32+0x2D+0x30+0x31+0x38+0x30+0x30
= 0x24C
The checksum is the lower 8 bits, which is 0x4C.