Inovance GL20-4TC User manual

*PS00007575A00*

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Preface
■ About this Guide
The GL20‑4TC 4‑channel thermocouple temperature detector module can be used
with Easy series products and GL20 series communication interface modules such as
GL20‑RTU‑ECT.
This guide describes the mechanical installation, electrical installation and
programming examples of the product.
■ Standards Compliance
The following table lists the certifications, directives, and standards that the product
may comply with. For details about the acquired certificates, see the certification
marks on the product nameplate.
Certifica‑
tion
Directive Standard
CE
Certifica‑
tion
EMC Directive 2014/30/EU 24 VDC products
EN 61131‑2
220 VAC products
EN 61131‑2
EN 61000‑3‑2
EN 61000‑3‑3
Low Voltage
Directive (LVD)
2014/35/EU EN 61010‑1
EN 61010‑2‑201
RoHS Directive 2011/65/EU
amended by (EU)
2015/863
EN IEC 63000
UL/cUL
Certifica‑
tion
‑ UL 61010‑1
UL 61010‑2‑201
UL 61010‑2‑030
CAN/CSA‑C22.2 No. 61010‑1
CSA C22.2 NO. 61010‑2‑201
CSA C22.2 NO. 61010‑2‑030

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Certifica‑
tion
Directive Standard
KCC
Certifica‑
tion
‑ ‑
EAC
Certifica‑
tion
‑ ‑
■ More Data
Data Name Data Code Description
GL20‑RTU‑ECT
Communication Interface
Module User Guide
PS00004985 This guide describes the installation,
wiring and more of the product.
■ Revision History
Date Revision Description
February 2023 A00 First release
■ How to obtain
This guide is not in the scope of delivery. If necessary, you can download the PDF file
in two ways:
●Log in to Inovance's website (
www.inovance.com
), choose Support > Download,
search by keyword, and then download the PDF file.
●Scan the QR code with a smartphone to obtain the document.
■ Warranty Instructions
The warranty period of the product is 18 months as of the date of manufacture (refer
to the barcode on the equipment). If otherwise agreed upon, the agreed terms and
conditions shall prevail. After the warranty period expires, maintenance will be
charged.
Within the warranty period, maintenance will be charged for damages caused by the
following:
●your failure to operate the product in accordance with the user guide
●events beyond our reasonable control, such as fire, flood and abnormal voltage

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●function misuse
●out‑of‑range application
●other events of force majeure, including but not limited to lightning, earthquake
and other extreme weather events
The maintenance fee is charged according to the latest Price List of Inovance. If
otherwise agreed upon, the agreed terms and conditions shall prevail.
For details, see Product Warranty Card.

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Safety Precautions
■ Safety Disclaimer
1. Read and comply with the safety instructions during installation, operation, and
maintenance of the equipment.
2. To ensure the safety of humans and the products, follow the marks on the products
and all the safety instructions in this document.
3. "CAUTION", "WARNING", and "DANGER" items in this guide do not indicate all
safety precautions that need to be followed; instead, they just supplement the
safety precautions.
4. Use this product in environments meeting the design and specification
requirements; otherwise, a fault may occur. Noncompliance‑caused malfunction or
damage to parts are not covered in product quality warranty.
5. Inovance shall take no responsibility of any personal injuries or property damages
caused by improper use.
■ Safety Levels and Definitions
: Indicates that failure to comply with the notice will result in death or
severe personal injuries.
: Indicates that failure to comply with the notice may result in death or
severe personal injuries.
: Indicates that failure to comply with the notice may result in minor or
moderate personal injuries or damage to the equipment. Please keep this guide well
so that it can be read when necessary and forward this guide to the end user.

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During Control System Design
●Provide a safety circuit outside the PLC so that the control system can still work safely
once external power failure or PLC fault occurs.
●Add a fuse or circuit breaker because the module may smoke or catch fire due to long‑
time overcurrent caused by operation above rated current or load short‑circuit.
●An emergency stop circuit, a protection circuit, a forward/reverse operation interlocked
circuit, and a upper position limit and lower position limit interlocked circuit must be set
in the external circuits of PLC to prevent damage to the machine.
●To ensure safe operation, for the output signals that may cause critical accidents, please
design external protection circuit and safety mechanism.
●Once PLC CPU detects abnormality in the system , all outputs may be closed; however,
when a fault occurs in the controller circuit, the output may not be under control.
Therefore, it is necessary to design an appropriate external control circuit to ensure
normal operation.
●If the PLC output units such as relays or transistors are damaged, the output may fail to
switch between ON and OFF states according to the commands.
●The PLC is designed to be used in an indoor electrical environment (overvoltage category
II). The power supply must have a system‑level surge protector, assuring that overvoltage
due to lightning shock can't be applied to the PLC's power supply input terminals, signal
input terminals and output terminals, to prevent damage to the equipment.
Installation

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●Installation must be carried out by the specialists who have received the necessary
electrical training and understood enough electrical knowledge.
●Disconnect all external power supplies of the system before removing/installing the
module. Failure to do so may result in electric shock, module fault or malfunction.
●Do not use the PLC where there are dust, oil smoke, conductive dust, corrosive or
combustible gases, or exposed to high temperature, condensation, wind & rain, or
subject to vibration and impact. Electric shock, fire and malfunction may also result in
damage or deterioration to the product.
●The PLC is open‑type equipment that must be installed in a control cabinet with lock
(cabinet housing protection > IP20). Only the personnel who have received the necessary
electrical training and understood enough electrical knowledge can open the cabinet.
●Prevent metal filings and wire ends from dropping into ventilation holes of the PLC
during installation. Failure to comply may result in fire, fault and malfunction.
●Ensure there are no foreign matters on ventilation surface. Failure to comply may result
in poor ventilation, which may cause fire, fault and malfunction.
●Ensure the module is connected to the respective connector securely and hook the
module firmly. Improper installation may result in malfunction, fault or fall‑off.
Wiring
●Wiring must be carried out by personnel who have received the necessary electrical
training and understood enough electrical knowledge.
●Disconnect all external power supplies of the system before wiring. Failure to comply
may result in electric shock, module fault or malfunction.
●Perform good insulation on terminals so that insulation distance between cables will not
reduce after cables are connected to terminals. Failure to comply may result in electric
shock or damage to the equipment.

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●To avoid electric shock, cut off the power supply before connecting the power supply of
the HMI.
●The input power of the product must meet the specifications listed in this guide. If the
power input does not meet the specifications, the equipment may be damaged. Thus,
check regularly that the DC power provided by the switching‑mode power supply unit is
stable.
During Operation and Maintenance
●Maintenance & inspection must be carried out by personnel who have the necessary
electrical training and experience.
●Do not touch the terminals while the power is on. Failure to comply may result in electric
shock or malfunction.
●Disconnect all external power supplies of the system before cleaning the module. Failure
to comply may result in electric shock.
●Disconnect all external power supplies of the system before removing the module or
connecting/removing the communication wirings. Failure to comply may result in electric
shock or malfunction.
Safety Recommendations
●In positions where the mechanical parts is exposed to operators, such as positions for
loading and unloading machinery tools, or where the machine operates automatically,
●If modification on the program is needed during system operation, use a password or
other protective measures to ensure that only authorized operators can perform such
modification.
Disposal
●Treat the scrapped product as industrial waste. Dispose of the battery according to local
laws and regulations.
●Recycle retired equipment by observing industry waste disposal standards to avoid
environmental pollution.

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1 Product Information
1.1 Model Number and Nameplate
①Product Information
GL: General local module
③I/O Points
4: 4 inputs
②Serial Number
20: 20 series module
④Module Type
TC: Thermocouple temperature
detector
Based on the above description of model number and nameplate, the relevant
ordering data of this product is described in the following table.
Model Description Product Code Applicable Model
GL20‑4TC GL20 series 4‑channel
thermocouple temperature
detector module
01440338 Easy series products and
GL20 series
communication interface
modules such as GL20‑
RTU‑ECT

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1.2 Components

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No. Name Definition
①Signal
indicators
PR (POWER
+RUN)
Power / running
indicator
Yellow
green
●ON: The module is
in normal
operation.
●Flashing quickly:
The module is
addressed
successfully.
●Flashing slowly:
The module is
powered on, but
not addressed.
●OFF: The module
is not powered on
or is faulty.
ERR Error indicator Red ON when the
module is faulty.
②I/O terminal 4 thermocouple inputs, as defined in "
3.2 Terminal Definition "
on page 23
③Color
identification
Red: Digital
output
Orange: Analog
output
Grey: Digital
input Green: Analog input
White:
Communication Blue: Other module
Note
●Flashing quickly: on for 200 ms followed by off for 200 ms.
●Flashing slowly: on for 200 ms followed by off for 1000 ms.

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1.3 Technical Specifications
■ General Specifications
Item Specification
Rated bus input voltage 5 VDC (4.75 V DC to 5.25V DC)
Rated bus input current 100 mA (typical@5 V)
Rated terminal input voltage 24 VDC (20.4 V DC to 28.8 VDC)
Rated terminal input current 100 mA (typical@5 V)
Rated terminal output voltage /
Rated terminal output current /
Hot swap Not supported
Anti‑reverse connection 24 V Supported
Dimensions (W x H x D) 12 mm x 100 mm x 75 mm
Weight About 157 g
■ Input Specifications
Item Specification
Input channels 4
Digital resolution 24 bits
Display sensitivity 0.1℃, 0.1℉
Input terminal Thermocouple input, thermocouple type: B, E, N, J, K, R,
S, T
Compensation method Internal cold junction compensation
Accuracy (room temperature 25°
C)
(±0.1%)[1](±100mV full scale) + cold junction
compensation error[2]
Accuracy (operating temperature
–20°C to 55°C)
(±0.3%)[1](±100mV full scale) + cold junction
compensation error[2]
Isolation Isolation between I/O terminals and power supply, no
isolation between channels
Input action display /

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Item Specification
Input derating /
Overlimit and wire break
detection
Supported
Power consumption <0.9 W
*[1]: Indicates ADC sampling accuracy, which needs to be determined based on
sensor type and thermocouple detection temperature range. For details, see “
Table
1–1
” on page 13 .
*[2]: The cold junction compensation error needs to be determined based on the
mounting direction, adjacent module type and operating temperature range. For
details, see “
Table 1–2 ” on page 15 .
■ Software Specifications
Item Specification
Diagnostic report configuration Supported
Diagnostic detection
configuration
Supports overlimit and wire break detection
Sensor type configuration Supported thermocouple types: B, E, N, J, K, R, S, T,
default type K thermocouple
Filter time 0s to 100s (configurable through software, default 5s)
Overflow and overflow detection Supports reporting overflow errors only when overflow
is enabled.
Overlimit detection
configuration
Supported
Independent channel
configuration
Supported
Temperature drift configuration Supported
Temperature setting range ‑204.8 to +204.7 temperature units
Sampling cycle 250 ms, 500 ms, 1000 ms/4 channels
Display mode Celsius (°C), Fahrenheit (°F)
Sensitivity 0.1℃, 0.1℉

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Item Specification
Sampling refresh Refresh asynchronously according to the sampling time,
not required to refresh synchronously according to the
bus cycle
Stop mode Output at maximum value, no longer refreshed
Wire break or overlimit Output at maximum value, no longer refreshed
System diagnostics System power exception
Channel diagnostics Beyond upper limit alarm, beyond lower limit alarm,
wire break alarm, overflow error
Software diagnostics Not supported
Configuration diagnostics Configuration error identification, channel parameter
configuration error
■ Accuracy Calculation
Within the operating temperature range and when the temperature change rate is
less than 0.3°C/min, the accuracy of the product = ADC sampling accuracy + cold
junction compensation error. According to the measurement principle, the module
should be powered on for 45 minutes before measurement.
●Recommended: Within the operating temperature range and when installed
upright horizontally (refer to “
Figure 2–1 ” on page 20 ), when the adjacent module
is a temperature module, the cold junction compensation error is within ±3°C.
●Not recommended: The adjacent module consumes more than 3.5W power, such
as GL20‑3232ETN module.
Table 1–1 Thermocouple detection range and ADC sampling accuracy
Sensor
Type
Detection range ADC Sampling Accuracy
B 200.0°C to 1800.0°C, 392.0°F to 3272.0°F ≥±5°C@200℃ ≤T≤400°C
<±5°C@400℃ ≤T≤750°C
<±3°C@750°C ≤T≤1200°C
<±3.5°C@1200°C≤T≤1800°C
E–270.0°C to 1000.0°C, –454.0°F to 1832.0°F ≥±1°C@–270≤T≤–200
<±1°C@–200≤T≤400
<±1.5°C@400℃≤T≤1000°C

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Sensor
Type
Detection range ADC Sampling Accuracy
N–200.0°C to 1300.0°C, –328.0°F to 2372.0°F <±2°C@–200°C≤T≤‑150°C
<±1.5°C@–150°C≤T≤750°C
<±0.2% of displayed value @
750°C ≤ T ≤ 1300°C
J–210.0°C to 1200.0°C, –346.0°F to 2192.0°F ≥±1°C@–210°C≤T≤–100°C
<±1°C@–100°C≤T≤500°C
<±0.2% of displayed value @
500°C ≤ T ≤ 1200°C
K–270.0°C to 1370.0°C, ‑454.0°F to 2498.0°F <±1.5°C@–270°C≤T≤–200°C
<±1.5°C@–200°C≤T≤–100°
<±1°C@–100°C≤T≤500°C
<±0.2% of displayed value@500°
C≤T≤1300°C
≥±2.6°C@1300°C≤T≤1370°C
R–50.0°C to 1765.0°C, –58.0°F to 3209.0°F ≥±4°C@–50°C≤T≤0°C
<±4°C@0°C≤T≤250°C
<±2°C@250°C≤T≤500°C
<±3.5°C@500°C≤T≤1700°C
≥±3.5°C@1700°C≤T≤1765°C
s–50.0°C to 1765.0°C, –58.0°F to 3209.0°F ≥±4°C@–50°C≤T≤0°C
<±4°C@0°C≤T≤250°C
<±2°C@250°C≤T≤500°C
<±3.5°C@500°C≤T≤1700°C
≥±3.5°C@1700°C≤T≤1765°C
T–270.0°C to 400.0°C, ‑454.0°F to 753.0°F ≥±1°C@‑270°C≤T≤–200°C
<±1°C@–200°C≤T≤400°C

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Table 1–2 Cold junction compensation error
Installation
Direction
Adjacent Module
Type
Cold junction
compensation error (–
20°C to 0°C)
Cold Junction
compensation error (0°
C to 55°C)
Horizontal,
upright
Temperature
module
±3°C ±1.75°C
Non‑temperature
module
±6.5°C ±4.5°C
Non‑horizontal,
upright
Temperature
module
±5.5°C ±4°C
Non‑temperature
module
±5.5°C ±4.5°C
1.4 Environmental Specifications
Item Specification
Operating
temperature
–20°C to 55°C
Operating
humidity
10% to 90% RH (condensation)
Working
environment
No corrosive and flammable gas and no excessive conductive dust
Storage
temperature
–40°C to 70°C (<90% RH, non‑condensing)
Maximum altitude ≤2000 m
Pollution degree 2 or less
Immunity 2 kV on power supply line (IEC 61000‑4‑4)
Overvoltage
category
I
EMC immunity
level
Zone B, IEC61131‑2

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Item Specification
Vibration
resistance
IEC 60068‑2‑6
5 Hz to 8.4 Hz, 3.5 mm, 8.4 Hz to 150 Hz, 1 g, 10 times each in X, Y and
Z directions
Shock resistance IEC 60068‑2‑27
150 m/s2, 11 ms, 3 times each in ±X, ±Y and ±Z directions, 18 times
in total

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2 Mechanical Installation
2.1 Mounting Dimensions
■ Module
The mounting dimensions (in mm) are shown in the figure below.
■ Cable Connection

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2.2 Installation Method
The module is mounted onto a DIN rail in conformity with IEC 60715 (width: 35 mm,
thickness: 1 mm). The dimensions (unit: mm) are shown below.
When installed on a DIN rail other than the recommended one (especially the one
whose thickness is not 1.0 mm), the module will not fit in place as the mounting hook
does not work.
■ Installing Modules Side-by-Side
You can install multiple modules side by side with the help of top and bottom guides
on the modules, as shown below.