Rice Lake SCT-1SX Series User manual

SCT-1SX Series
Firmware version 01.21.01
Operation Manual
PN 221632 Rev A
January 4, 2024

© Rice Lake Weighing Systems. All rights reserved.
Rice Lake Weighing Systems® is a registered trademark of
Rice Lake Weighing Systems.
All other brand or product names within this publication are trademarks or
registered trademarks of their respective companies.
All information contained within this publication is, to the best of our knowledge, complete
and accurate at the time of publication. Rice Lake Weighing Systems reserves the right to
make changes to the technology, features, specifications and design of the equipment without
notice.
The most current version of this publication, software, firmware and all other product
updates can be found on our website:
www.ricelake.com

© Rice Lake Weighing Systems • All Rights Reserved 3
This section tracks and describes manual revisions for awareness of major updates.
Revision History
Revision Date Description
AJanuary 4, 2024 Initial release

4 Visit our website www.RiceLake.com
Table of Contents
Introduction 7
Transmitter Installation 8
Installation Requirements 8
Electrical Precautions 9
System Grounding 11
Technical Features 15
Load Cell Installation 16
Wiring Diagrams 17
SCT-1SX-AN 17
SCT-1SX-E/IP, SCT-1SX-PRONET, SCT-1SX-MODTCP 18
Display and Key Functions 19
Quick Menu 19
Advanced Programming Menu 20
Access the Advanced Menu and Save Changes 20
Menu Key Function 20
Menu Block Diagram 21
Theoretical Calibration 23
Calibration with Sample Weights 24
Manual Calibration 26
Quick Zero Calibration (Pre-tare Reset) 26
ADC Converter Precalibration 27
Filter and Stability 27

© Rice Lake Weighing Systems • All Rights Reserved 5
Filter adjustment 27
Anti-peak Filter 28
Stability Detection Divisions 28
Stability Detection Time 29
Additional Filter for Stability Detection 29
Gravity 30
Reset Functions and Parameters 31
Auto-zeroing on Start-up 31
Maximum Percentage of Manual Zeroing 31
Zero Tracking 32
Zero Tracking Time 32
Restoring Zero 32
Semi-automatic Zeroing 32
Tare Functions and Parameters 33
Tare Mode 33
Semi-automatic tare 33
Predetermined Tare 33
Clearing the Tare 33
Restoring the Tare 33
Alibi Memory 34
Enabling the Alibi Memory 34
Saving a Weighing Operation in the Alibi Memory 34
Reading the Alibi Memory 35
Initializing the Alibi Memory 35
Use Functions 36
High Resolution 36
Peak Detection 36
Converting Units of Measure 36
Alibi Memory 36
Input Configuration 37
Output Configuration 38
Analog Output Configuration 39
Serial Communication Configuration 41

6 Visit our website www.RiceLake.com
USB port Configuration  41
485 Port (PC port) Configuration  42
Communication Protocols  43
Standard String  43
Extended String  43
Serial Commands  44
Modbus Protocol  47
Diagnostics  49
Programming the Setpoints  50
Restoring Factory Settings  51
Alarms  52

© Rice Lake Weighing Systems • All Rights Reserved 7
Thank you for purchasing this product.
This manual contains instructions for correct installation and commissioning of the SCT-1SX digital weight transmitters, including the
following SCT-1SX models::
• SCT-1SX-AN
• SCT-1SX-PRONET
• SCT-1SX-E/IP
• SCT-1SX-MODTCP
Also, this manual provides information on the correct operation and maintenance of the weigh transmitter. It is essential to pay the close
attention to operation procedures.
It is recommended that you carefully follow the instructions for programming the weight transmitter; performing actions not indicated in
this manual could compromise the functionality of the scale.
iManuals are available from Rice Lake Weighing Systems at www.ricelake.com/manuals
Warranty information is available at www.ricelake.com/warranties
Any problem with the product must be reported to the manufacturer or to the retailer where it was purchased.
Always TURN OFF THE POWER SUPPLY prior to installation or repair action.
Introduction

8 Visit our website www.RiceLake.com
Transmitter Installation
Installation Requirements
Observe the following conditions for correct installation of the transmitter and the load receiver:
• Flat, level support surface.
• Stability and absence of vibrations.
• Absence of aggressive dusts and vapor.
• Absence of drafts.
• Ensure the platform is level or that the load cells are evenly supported.
• Moderate temperature and humidity: 59°F - 86°F (15°C - 30°C) and 40% - 70%.
• Do not install in an environment where there is a risk of explosion.
• All transmitter connections must be made in accordance with applicable regulations in the area and environment of installation.
Read the electrical precautions listed in the section “Electrical Precautions”.
• Ensure the system is correctly grounded, see the relevant section “System Grounding”.
• Do not perform welding when the load cells have already been installed.
• If necessary, use watertight sheaths and fittings to protect the load cell cables.
• Any junction boxes must be watertight.
• Anything not expressly described in this manual constitutes improper use of the equipment.

© Rice Lake Weighing Systems • All Rights Reserved 9
Electrical Precautions
• Use a regulated mains supply within ± 10% of the rated voltage.
• The electrical protections (fuses, etc.) are the responsibility of the installer.
• Observe the recommended minimum distances between cables of dierent categories (see table on page 10).
• The following cables must comply with the maximum permissible lengths (see table on page 10), they must be shielded and must be
inserted alone in metal conduits or pipes:
- the load cell extension cables;
- the signal amplifier cables;
- the cables for connecting the serial ports;
- the analog output cables.
• The cell or amplifier cables must have an independent input in the electrical panel. They must be connected (if possible) directly to
the terminal block of the transmitter without passing through the conduit with other cables.
• Fit “RC” filters:
- on the contactor coils;
- on the solenoid valve coils;
- on all devices that produce electrical interference.
• If condensation can occur inside the weight transmitter, it is advisable to keep the equipment powered at all times.
• Connections to load cells and any external device must be as short as possible.
• The cable ends (connectors, leads, terminals, etc.) must be installed correctly; the cable shielding must be kept intact until close to
the connection point.
• If the transmitter is placed inside an electrical panel, a shielded cable must also be used for the power supply.

10 Visit our website www.RiceLake.com
Category I Category II Category III Category IV
Distance
≥ 3.94 in (100 mm)
≥ 7.87 in (200 mm)
≥ 19.69 in (500 mm)
≥ 3.94 in (100 mm)
≥ 19.69 in (500 mm)
≥ 19.69 in (500 mm)
Classification
Fieldbus, LAN network
(PROFIBUS or Ethernet).
Shielded data cables
(RS232...).
Shielded cables for
analog digital signals
< 25 V (sensors, load
cells...).
Low voltage power
supply cables (< 60 V).
Coaxial cables.
DC supply cables with
voltage > 60 V and <
400 V.
AC supply cables with
voltage > 25 V and <
400 V.
Power supply cables
with voltage > 400 V.
Telephone cables.
Any cable subject to
lightning danger.
Load cell RS232 RS485 Analog output
164 ft (50 m) with 6 x 24
AWG (0.25 mm2) cable;
328 ft (100 m) with 6 x 22
AWG (0.5 mm2) cable.
49 ft (15 m) with baud
rate up to 19200.
3937 ft (1200 m) with
shielded 2 x 24 AWG
twisted pair with outer
braid + aluminium strip.
CURRENT:
• 328 ft (100 m) with 2 x 24 AWG (0.25 mm2
cable);
• 492 ft (150 m) with 2 x 22 AWG (0.5 mm2
cable);
• 984 ft (300 m) with 2 x 17 AWG (1 mm2
cable).
VOLTAGE:
• 164 ft (50 m) with 2 x 24 AWG (0.25 mm2
cable);
• 246 ft (75 m) with 2 x 22 AWG (0.5 mm2
cable);
• 150 meters with 2 x 17 AWG (1 mm2cable).
RECOMMENDED DISTANCES AND CABLE CLASSIFICATION
MAXIMUM ALLOWED LENGTHS

1 2
+-
GND Vdc
1 2
+-
GND Vdc
1 2
+-
GND Vdc
SCT-1SX
SCT-1SX Correct earth connection Incorrect earth connection
© Rice Lake Weighing Systems • All Rights Reserved 11
System Grounding
For correct earthing and optimal system operation, the transmitter, load cells, junction box, if any, and weighing structure must be
earthed.
TRANSMITTER
The earth connection must be made via the appropriate terminal. The cable cross-section must be less than 14 AWG (2.5 mm2). The
transmitter must be powered by a dedicated power supply with earth reference. Do not connect EARTH and GND terminals together!
LOAD CELLS AND JUNCTION BOX
The connection must be made by connecting the ground cables to the ground bar (cables that must have a cross-section of at least 6
AWG/16 mm2); finally, connect the earth bar to the earth post with a cable having a cross-section of at least 1-1/0 AWG (50 mm2).
EXAMPLES:
• If more load cells are connected to the transmitter through a junction box, the cable shield from the transmitter and the cell cable shields
must be connected to the earth socket of the junction box (refer to the junction box manual) and the junction box must be earthed using
a copper cable with a cross-section of not less than
6 AWG (16 mm2) .
• If the load cell is connected directly to the transmitter (without using the junction box), the cell cable shields must be connected to
theearthing point (or earth bar).
• If the weighing system involves large and/or outdoor structures (weighbridges, silos, etc.) and the distance between the junction box
andthe weight transmitter is greater than 33 ft (10 m), connect the cell cable shields to the earth socket in the junction box.
WEIGHING STRUCTURE
Earth the weighing structure and/or any unconnected structures (e.g. silos that release material onto the weighing structure) using cables
with a cross-section of not less than 6 AWG (16 mm2).
Also connect the upper part with the lower part of each cell by means of a copper braid with a cross-section not less than 6 AWG (16
mm2) (refer to the grounding examples on page 12 and page 13).
SERIAL CABLES AND CONNECTED INSTRUMENTS
Connect the serial cable shield to the earthing point (or earth bar) inside the panel. To avoid any undesired eects, the earth reference of
the connection cable, power supply and transmitter must be at the same potential.

i
12 Visit our website www.RiceLake.com
GENERAL NOTES:
• All earth cables must be of suitable length, so as to obtain an overall resistance of the earthing system of less than 1 .
• If the weighing system involves large and/or outdoor structures (weighbridges, silos, etc.):
- the earth connection must be made by connecting the earth cables to an earth bar and the earth bar to the earth post
with a cable having a cross-section of not less than 1-1/0 AWG (50 mm2);
- the earth post must be placed at a distance of at least 33 ft (10 m) from the structure.
• If the load receiver is more than 33 ft (10 m) from the transmitter, we recommend using the SENSE line and load cells
equipped with a (SENSE) compensation circuit.

© Rice Lake Weighing Systems • All Rights Reserved 13
EXAMPLE OF GROUNDING OF A WEIGHBRIDGE
Load cell bypass jumper
Weighbridge
Weight transmitter
Load cell
Ground cables
Ø 8 - sec. 1-1/0 AWG (50 mm2)
Ø 11.3 - sec. 95 AWG (100 mm2)
Earth post
positioned under
or near the
weighbridge
Drilled copper plate positioned
on the side wall
Junction box
placed on the side wall of the pit
Weighbridge

14 Visit our website www.RiceLake.com
Load cell
Protective earth by-
pass for the load cell
EXAMPLE OF EARTHING OF A SILO

© Rice Lake Weighing Systems • All Rights Reserved 15
Technical Features
POWER SUPPLY 12 -24 VDC LPS or with class 2 power supply.
MAXIMUM ABSORPTION
(without load cells)
• SCT-1SX-AN: 2 W
• SCT-1SX-E/IP, SCT-1SX-PRONET, SCT-1SX-MODTCP: 4 W
OPERATING TEMPERATURE From 14°F to 104°F (-10°C to +40°C)
DISPLAY DIVISIONS 10000e, 2 x 3000e for legal weighing, expandable up to 800,000 for internal use (with a
minimum cell signal of 1.6 mV/V)
CONVERSION SPEED Up to 4800 conversions / sec
MINIMUM VOLTAGE PER DIVISION 0.3 V (restricted transmitter); 0.03 V (non-restricted transmitter).
COUNTING RESOLUTION 1,500,000 points (with input signal 3 mV/V)
DISPLAY 6 digits, 0.3 in (8 mm) high
SIGNALS 6 status indicator LED lights
KEYPAD mechanical with 5 keys
TARE FUNCTION Subtraction possible over the entire range
LOAD CELL POWER SUPPLY 5 VDC, 250 mA
LOAD CELL CONNECTION 6 wires or 4 wires
CONNECTABLE CELLS Up to 16 350  cells
CASE Made of plastic (ABS), suitable for DIN rail mounting (EN 60715 - DIN43880) or wall mounting
SERIAL OUTPUTS • 1 half duplex RS485 bidirectional port on terminal (
SCT-1SX-AN)
• 2 ETHERNET ports (SCT-1SX-E/IP, SCT-1SX-MODTCP, SCT-1SX-PRONET)
• 1 USB port (micro USB type B) → Virtual COM (Device)
OUTPUTS / INPUTS • 4 photomosfet NO or NC outputs: max 60 VDC 0.5 A max / 48 VAC 0.5A;
• 2 configurable inputs (bidirectional optocouplers): 12 - 48 VDC;
• Input reading and output update time: 1 msec;
• 16-bit analog output (SCT-1SX-AN only).
• Current: 0 - 20 mA / 4 - 20 mA.
• Voltage: 0 - 5 VDC, 0 - 10 VDC.
The maximum applicable resistance on the current output is 300  while the mini-
mum applicable resistance on the voltage output is 1 k.
LOAD CELL SENSITIVITY Maximum sensitivity of the connectible load cells: 6 mV/V
FIELDBUS UPDATE RATES Up to 120 Hz

14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
OFF
EXC - EXC + REF - REF + SIG - SIG +
14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
ON
EXC - EXC + SIG - SIG +
14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
OFF
EXC - EXC + REF - REF + SIG - SIG +
14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
ON
EXC - EXC + SIG - SIG +
16 Visit our website www.RiceLake.com
Load Cell Installation
After carrying out the instructions for the platform or load receiver, the shielded cable from the cell must be properly connected to the
terminal block of the transmitter (see page 17).
The transmitter has one channel for 6-wire connection to load cells (using the REFERENCE).
The REFERENCE allows you to compensate for any voltage drop on the section of cable connecting the transmitter to the load receiver.
It is especially useful when the distance between the transmitter and the load receiver is more than 32 ft (10 meters), or in high-resolution
applications.
4-WIRE CONNECTION 6-WIRE CONNECTION

18 19 20 21
ANALOG
OUTPUT
V-
V+
I-
I+
+-
IN 2 IN 1 COM RL2 RL1
12 / 24 VDC
RL4 RL3
8 9763 4 51 2 10 11
RS485
B(-)
A(+)
14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
ON
EXC - EXC + REF - REF + SIG - SIG +
CAL
© Rice Lake Weighing Systems • All Rights Reserved 17
SCT-1SX-AN
Internal use
Wiring Diagrams

ETHERNET I/O PORT 1 ETHERNET I/O PORT 2
+-
IN 2 IN 1 COM RL2 RL1
12 / 24 VDC
RL4 RL3
8 9763 4 51 2
14 1512 13 16 17
LOAD CELL
+
+
-
-
E +
E -
S+
S-
ON
EXC - EXC + REF - REF + SIG - SIG +
CAL
18 Visit our website www.RiceLake.com
SCT-1SX-E/IP, SCT-1SX-PRONET, SCT-1SX-MODTCP
Internal use

C
1 2 3 4 5 6
© Rice Lake Weighing Systems • All Rights Reserved 19
Display and Key Functions
Quick Menu
Symbol Description
Semi-automatic zeroing.
Decreases the selected digit.
Semi-automatic tare.
Increases the selected digit.
Activates the function.
Selects the digit to be changed.
Confirms a value.
Prints / Transmits data.
CReboots the transmitter.
Number Description
1Gross weight on zero.
2Unstable weight.
3A tare is active.
4A special function is active.
5Output 1 is active.
6Output 2 is active.
The transmitter is equipped with a quick menu, through which you can program the main parameters of the scale.
To enter the quick menu, follow the procedure below:
1. Reboot the transmitter.
2. Press the key when the display shows 888888.
For further information, refer to the transmitter Quick Start Guide.

i
i
888888
MENU ACCESS: SAVING THE PARAMETERS:
Press the key during the start-
up procedure.
Press the key several times, until the display shows
SAVE?. Press the key to confirm.
Complete menu
on pages 21 - 22
20 Visit our website www.RiceLake.com
Menu Key Function
In the menu description on the following pages the symbol indicates repeated pressing of the key until the parameter
indicated is reached.
Advanced Programming Menu
Access the Advanced Menu and Save Changes
HOW TO EXIT THE SETUP AND SAVE CHANGES
1. Press Cseveral times, until the display shows “save?”.
2. Press to save or Cto exit without saving.
1. Reboot the transmitter.
2. Press the key when the display shows 888888.
The advanced menu contains all the transmitter configuration parameters for the most advanced adjustments.
Previous parameter.
Next parameter.
Access the parameter / confirm setting.
CExit a parameter (without saving).
FUNCTION OF THE KEYS WHEN ENTERING NUMBERS
Increases the selected digit.
Decreases the selected digit.
Selects the next digit.
Confirms the value.
CResets the value.
If pressed again, exits entering.