Optex SC-U1 User manual

Universal Transmitter
SC-U1(E)
Operation Manual
Thank you very much for purchasing the Universal Transmitter SC-U1.
All of this instruction manual must be read before operation of the Universal
Transmitter SC-U1 for safe and proper operation.
This instruction manual should be kept for future reference such as maintenance.
The instruction manual is also available on the following website.
https://navi.optex.net/manual/05324

2
Features (what this product can do)
Two sensors can be installed.
OutputInput
4-20 mA output
The measurement value can be
output at 4-20 mA.
2 channels can be output.
Relay output
The alarm level can be set and the
contact output can be activated
when the measurement value
exceeds the trigger.
The relay output can be assigned
to Self Checking and maintenance
output as well.
4 channels can be output.
This Universal Transmitter SC-U1 is a signal converter that displays the measurement
value of the sensor, converts the sensor signal into an analog signal and outputs it to an
external recorder, or outputs a relay contact signal to an external control panel when the
sensor signal exceeds the alarm trigger.

3
Option
Measurement values can be uploaded to a cloud server by wireless
communication.
Measurement values can be monitored from a remote place.
Notifications can be sent by e-mail for error and maintenance information.
The number of sensors that can be input,
the 4-20 mA output that can be output, and
the number of relay output channels can be
increased.
The number of channels shown in the table is the maximum number
that can be installed.
Configuration Sensor 4-20 mA output Relay output
SC-U1 only 2 channels 2 channels 4 channels
SC-U1 and
SC-U-EB 4 channels 4 channels 8 channels
Up to 2 more sensors can
be installed.
4-20 mA output
Up to 2 more channels can
be installed.
Relay output
Up to 4 more channels can
be installed.
Sensor Input Expansion/
Output Expansion Board SC-U-EB
Gateway

4
List of contents
SC-U1 main unit: 1 Transmitter mounting bracket: 1
Power supply
Y terminal (M3): 2
Grounding
Y terminal (M4): 1
Cover fixing screw
and nut (M5): 1
Transmitter mounting screw
(M5 x 10): 2
Universal Transmitter
SC-U1(E)
Operation Manual
Thank you for purchasing Universal Transmitter SC-U1.
All of this instruction manual must be read before operation of the Universal
Transmitter SC-U1 for safe and proper operation.
This instruction manual should be kept for future reference such as maintenance.
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Operation manual (this document): 1 Installation manual : 1
Instruction Manual
If there are any missing or faulty items, please contact our sales representative.

5
Items referred to
The settings and operations differ depending on the sensor you installed.
For details, Refer to each sensor’s instruction manual.
Table of Contents
1 For Safe Use ....................................................................................................... 8
2 Component Name............................................................................................. 10
Front view...................................................................................................... 10
Inside the cover............................................................................................. 11
◆How to open/close cover........................................................................ 12
Operation button............................................................................................ 13
Display........................................................................................................... 14
◆Indication when more than one sensor is installed ................................ 14
◆Status bar details.................................................................................... 15
3 Operations on first boot/starting a task ......................................................... 16
Startup flow ................................................................................................... 16
◆On first boot............................................................................................ 16
◆Unlock passcode ................................................................................... 18
4 Available Operations for SC-U1 ...................................................................... 19
5 Setting Menu ......................................................................................... 20
5.1 Sensor Setting........................................................................................... 20
Sensor setting ............................................................................................... 20
◆Display Item............................................................................................ 22
◆Response Time....................................................................................... 25
5.2 GW (Gateway) Setting............................................................................... 26
Basic setting.................................................................................................. 27
◆Time Zone............................................................................................... 27
Send channel setting..................................................................................... 28
5.3 4-20 mA Setting ......................................................................................... 30
4-20 mA setting (4-20 mA output item setting).............................................. 32
◆Output Item Select.................................................................................. 32
◆Signal output range lower limit ............................................................... 33
◆Signal output range upper limit .............................................................. 34
4-20 mA output setting (fine adjustment for 4-20 mA output)........................ 35
◆4 mA Fine adjustment............................................................................. 35
◆20 mA Fine adjustment........................................................................... 36
4-20 mA test mode........................................................................................ 37

6
Items referred to
The settings and operations differ depending on the sensor you installed.
For details, Refer to each sensor’s instruction manual.
5.4 Relay Setting.............................................................................................. 38
Relay setting.................................................................................................. 40
◆Alarm output setting ............................................................................... 40
●Trigger ................................................................................................. 42
●Active Level ......................................................................................... 42
●Hysteresis............................................................................................ 43
●On Delay (alarm timer) ........................................................................ 44
●Off Delay (cancel timer)....................................................................... 45
◆Maintenance output setting.................................................................... 46
◆Cleaning output setting .......................................................................... 47
◆Self Checking output setting .................................................................. 48
Relay test mode ............................................................................................ 49
5.5 Main Unit Setting....................................................................................... 50
Date setting ................................................................................................... 51
Passcode lock ............................................................................................... 52
◆Passcode lock setting ............................................................................ 52
◆Passcode................................................................................................ 53
◆Auto lock................................................................................................. 54
LCD setting.................................................................................................... 55
◆Contrast setting ...................................................................................... 55
◆Backlight setting..................................................................................... 56
◆Backlight Timer....................................................................................... 57
Language ...................................................................................................... 58
Information .................................................................................................... 58
Initialization (Restore to factory default setting) ............................................ 59
Buzzer Setting............................................................................................... 59
6 Calibration ............................................................................................. 60
Calibration ..................................................................................................... 60
◆Example: Zero calibration using turbidity checker................................. 60
◆Initialize Calibration Value....................................................................... 62
7 Adjustment ........................................................................................... 63
Adjustment .................................................................................................... 63
◆Example: Offset adjustment using turbidity checker.............................. 65

7
8 Maintenance Setting ............................................................................ 66
Maintenance.................................................................................................. 66
◆Measurement value hold ........................................................................ 67
●Performing measurement value hold .................................................. 67
●Canceling measurement value hold.................................................... 68
◆Hold Timer .............................................................................................. 69
◆Maintenance Timer................................................................................. 70
●Setting maintenance timer................................................................... 70
●Canceling maintenance notification .................................................... 72
9 Cleaning ............................................................................................... 73
Cleaning ........................................................................................................ 73
◆Manual Cleaning .................................................................................... 74
◆Cleaning Interval .................................................................................... 75
◆Cleaning Interval (Relay) ........................................................................ 76
◆Cleaning Activation ................................................................................ 77
◆Post-cleaning Standby ........................................................................... 78
10 Firmware Update .............................................................................................. 79
11 Troubleshooting ............................................................................................... 80
Error Display.................................................................................................. 80
Error codes.................................................................................................... 82
◆Error code list ......................................................................................... 82
◆M5xx error code list................................................................................ 83
When in trouble ............................................................................................. 84
12 Maintenance...................................................................................................... 89
Maintenance (Monthly).................................................................................. 89
Periodic Inspection (Every 3 Months)............................................................ 89
Long-Term Storage ....................................................................................... 89
13 Specifications ................................................................................................... 90
14 External Dimensions........................................................................................ 91
Items referred to
The settings and operations differ depending on the sensor you installed.
For details, Refer to each sensor’s instruction manual.

8
Be sure to read this instruction manual in order to use the Universal
Transmitter SC-U1 properly.
• Please thoroughly read the "For Safe Use" before using the Universal Transmitter SC-U1
properly.
• Because these precautions are related to failure or malfunction, observe the precautions
for use without fail.
The SC-U1 is designed specifically for OPTEX sensors.
Do not connect any other equipment to the sensor input.
denotes "Prohibited action" and denotes "Required action".
1 For Safe Use
To prevent fire, electric shock, and/or failure
Be sure to use a power
supply of 100 to 240 VAC.
Using the product with an
AC voltage other than 100
to 240 VAC may cause fire
or electric shock.
Close the cover securely.
For how to close the cover, refer to “How to
open/close cover” P.12.
Turn off the power immediately in
the unlikely event that there
occur any abnormalities such as
smoke or abnormal noise.
Otherwise it may cause fire or
electric shock.
Keep the power off during
installation and wiring operations.
There are high voltage parts inside the
Transmitter. For installation and wiring, turn
off the power switch and disconnect the
power cable from the power supply source.
Failure to do so may result in fire or electric
shock.
OFF
Do not disassemble or modify
the Transmitter. The Transmitter
contains high voltage parts that may
cause the outbreak of fire or electric
shocks. Contact your dealer for
internal inspections, maintenance
and repairs.
Do not press when the sensor
with wiper is in air.
It may cause the sensor to malfunction.
When using a cleaning device other than
the one provided with the sensor, follow the
instruction manual of the cleaning device.

9
To acquire proper measurement values
Do not install in places exposed to
direct sunlight or poorly ventilated
areas.
Use the included transmitter
mounting bracket for installation.
Use the supplied cable gland for the
Transmitter. When connecting piping
directly to the Transmitter, take
measures to prevent corrosive gas
such as chlorine gas from entering
the Transmitter through piping.
Do not bind the signal output cable
and the power cable together or
place them in the same cable gland.
Do not touch electrical parts or the
board.
Remove the protective film from the
display before use.
Do not apply strong shock or
excessive force to the Transmitter.
To clean the Transmitter,
gently wipe it with
a clean, soft cloth
containing diluted
neutral detergent, and
then wipe off moisture
with a dry clean soft
cloth. Do not wipe with
an organic solvent. It
may cause failure.
Organic
solvent
Paint
thinner
It may cause failure.
Unit only suitable installed in control panel.

10
2 Component Name
Lock lever
Display
Operation panel
(cover)
Cover fixing
screw hole /
key hook
Cable gland
Front view

11
Power supply
switch
Terminal block for
gateway connection
Connector for SC-U-EB
ON
OFF
Terminal block
(shown below)
Power supply
(shown below)
Inside the cover
Caution
Do not touch the terminal blocks and cables connected to the terminal blocks.
A cable may come off, resulting in abnormal operation.
Terminal block Power supply
F.G.
LN
AC IN
Breaker
Ground
terminal
Power supply
terminal block
F.G.
LN
AC IN
4-20mA output
Sensor
ch1 ch2 ch1 ch2 ch1 ch2 ch3 ch4
Relay output
4-20mA output Sensor
ch3 ch4 ch3 ch4 ch5 ch6 ch7 ch8
Relay output
Terminal block (SC-U-EB) * Optional
Terminal block
Terminal block
Terminal block

12
To close the cover
To open the cover
Slide up the lock lever. Pull the cover to open.
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uHow to open/close cover
Caution
After closing the cover, make sure that the cover is fixed by the lock lever and that
it cannot be opened.
If the cover is opened, sufficient protection may not be provided.
Slide up the lock lever while holding the
cover, and close the cover tightly without
a gap.
Push and hold the cover, and make
sure to slide down the lock lever to the
indicated line.

13
No. Name Description of Functions
(1) HOME The indication returns from menu to measurement value display.
Selection button
(2)
UP/DOWN/
LEFT/RIGHT
• UP/DOWN:
Used to select an item in the setting menu.
Or, used to increase/decrease a value of the selected digit in the
numerical input.
• LEFT/RIGHT:
Used to switch between pages or select an item in the setting
menu.
Or, used to select a digit in the numerical input.
In addition, pressing both left and right simultaneously while
entering a value resets the value to the default value.
(3) ENTER Used to determine the selected item in the setting menu.
Or, used to determine the entered value in the numerical input.
(4) BACK Used to cancel an item in the setting.
Or, used to return to the previous display if no item is being selected.
Function button
(5) CAL Used to calibrate the sensor ("6 Calibration" P.60).
(6) MAINT Used to retain a measurement value "measurement value hold" or to
configure the hold timer setting ("8 Maintenance Setting" P.66).
(7) CLEAN Used to perform cleaning of the sensor or setting of cleaning time
("9 Cleaning" P.73).
(8) SETTING Used to perform settings such as input/output and date/time
("5 Setting Menu" P.20).
(9) ADJUST Used to correct a measurement value ("7 Adjustment" P.63).
(1)
(4)
(5)
(6)
(7)
(9)
(8)
(2)
(3)
Operation button

14
The display shows information of SC-U1 and installed sensors.
If more than one sensor is installed, the display is divided to display a respective
measurement value in each pane.
Individual measurement value is displayed for each sensor installed.
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3 to 4 sensors installed
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(1) Status bar
(6) Sensor
status
(5) 3rd display
(2) Sensor
channel
number
(4) 2nd display
(3) Main display
No. Name Description of Functions
(1) Status bar Shows the SC-U1 status ("Status bar details" P.15).
(2) Sensor channel
number
Shows the channel number of the sensor of the measurement value.
(3) Main display Measurement values are displayed.
Which measurement is assigned to the 1st, 2nd or 3rd display can
be optionally set ("Display Item" P.22).
Nothing is displayed if the display item is set to OFF.
(4) 2nd display
(5) 3rd display
(6) Sensor status Shows the status of the sensor.
Display
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uIndication when more than one sensor is installed

15
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(1) Date/time
(2) Button lock status
(3) Connection status
(4) Information status
(5) Relay output status
No. Name Description of Functions
(1) Date/time Shows the current date and time when the gateway is connected.
(2)
Button lock status Shows the passcode lock status of the operation buttons
(“Passcode lock” P.52).
• Function OFF: The icon is hidden
• Unlocked:
• Locked:
(3) Connection
status
Shows a device being installed.
• : Gateway
(4) Information
status
Shows presence of information requiring an attention such as an
error.
(5)
Relay output
status
Shows the relay status with relay output number.
• Number being indicated ( ): The relay is enabled
• Number being indicated ( ): The relay is outputting
• No number being indicated: The relay is off

uStatus bar details

16
Startup flow
Refer to the "Universal Transmitter SC-U1 Installation Manual" to
install the unit and perform wiring.
Make sure that wiring has been properly
done and turn on the power switch.
Close the cover.
1
2
3
ON
Power switch
Push up the lock lever while
holding the cover, and close the
cover tightly without a gap.
Push and hold the cover, and make
sure to pull down the lock lever to the
indicated line.
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uOn first boot
3 Operations on first boot/starting a task
Caution
Make sure there is no yellow
cushioning material left at the top and
bottom and remove it if any.
Otherwise the degree of protection
may be compromised.

17
After "WATER it" is displayed, the
measurement value display is displayed.
Secure the cover by attaching the supplied cover fixing screw to the
hole in the cover as needed.
4
5
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18

uUnlock passcode
If passcode lock is set, normal button operations are disabled after a certain period of no
operation ("Passcode lock" P.52).
The factory default setting is OFF for passcode lock.
Pressing any button under the locked status shows the passcode input display.
To unlock, use the following steps and enter the passcode.
Select a digit by and value by
, and type in the 4-digit passcode.
Press .
If entered correctly, the lock is unlocked and
button operations are enabled.
If there is no operation on the passcode input
display for one minute, the display returns to the
measurement value display.
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Caution
If you forgot the passcode, refer to "When in trouble" P.84, "Passcode lock cannot
be unlocked".

19
4 Available Operations for SC-U1
Setting
Sensor Setting
Configure the sensor information and settings.
Reference: "5.1 Sensor Setting"
GW setting
Configure the basic settings of the gateway (optional) and the items you want to
output to the gateway.
Reference: "5.2 GW (Gateway) Setting"
4-20 mA Setting
Set the measurement items and output range that you want to output from the
4-20 mA output.
Reference: "5.3 4-20 mA Setting"
Relay Setting
Set the measurement items to be output from the relay output, and set active
level, on delay, and off delay.
Reference: "5.4 Relay Setting"
Main Unit Setting
Configure the main unit’s date and time (display type) settings, passcode lock
settings, and contrast adjustment.
Reference: "5.5 Main Unit Settings"
Calibration
Use distilled water or ion exchanged water to adjust the sensor measurement
value to the reference value (zero).
In addition, adjust the sensor measurement value to the reference value using
the standard solution.
Reference: “6 Calibration”
Adjustment
The measurement values can be adjusted and displayed according to usage.
In addition, when the ambient environment (salinity and altitude) affects the
measurement value of the sensor, the information can be input and the measurement
value can be adjusted and displayed according to the ambient environment.
Reference: “7 Adjustment”
Maintenance
The measurement value can be held to the previous value for maintenance or
cleaning. Also, relay output related to sensor maintenance can be set.
Reference: “8 Maintenance Setting”
Cleaning
If the sensor is equipped with a cleaning device, or if the external cleaning device is
connected to the relay output, the operating timer of the cleaning device can be set for
automatic cleaning. The cleaning device can also be operated manually.
Reference: “9 Cleaning”
CalibrationSensor Setting GW Setting 4-20 mA Setting Relay Setting Main Unit Setting Adjustment Cleaning
P.20
P.26
P.38
P.50
P.60
P.63
P.73
P.66
P.30
If there is no operation on a display such as menu for three minutes, the display returns to the
measurement value display. However, it does not return to the measurement value display even
if no operation is performed while the function of each operation is being executed.
Maintenance
Setting

20
Sensor Setting
5.1 Sensor Setting
Configure the sensor information and settings.
Press .
The setting menu is displayed.
Select [Sensor Setting] using
, and press .
Select a sensor to set using ,
and press .
1
2
3
Sensor setting
5 Setting Menu
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Measurement
item
Sensor
model
Sensor channel
Caution
Pressing automatically retains the measurement value.