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Cotrust Simple Series PLC, Codesys Sp18 Platform CPU (C821) , CTSI-C821-16N1, 8di/8do Transistor Drain Output, Supports 8 Axis Ethercat
Port And Wharf Equipment

Cotrust Simple Series PLC, Codesys Sp18 Platform CPU (C821) , CTSI-C821-16N1, 8di/8do Transistor Drain Output, Supports 8 Axis Ethercat

This detail page turns one product record into a narrower sourcing decision with clearer category fit, adjacent routes and RFQ-ready context.

Quote on request

Cotrust | Applications and Buyer Notes

Cotrust is organized as a sourcing-ready Port And Wharf Equipment reference. The page combines visible product or company data with structured procurement cues so buyers can compare application fit, specifications, quantity, quality requirements and lead-time

Applications

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  • Specification and application fit review before bulk purchasing.
  • Category, keyword and detail-page comparison before sending an RFQ.

Key specifications

Category
PLC, HMI and ControllersBased on visible page data; confirm exact value in the RFQ.
Unit
setBased on visible page data; confirm exact value in the RFQ.
Application
Electrical and power distributionBased on visible page data; confirm exact value in the RFQ.
Axis Capacity
8 axes / 1ms 32 axes / 2msBased on visible page data; confirm exact value in the RFQ.
BF Indicator
Red ON = Bus fault, OFF = No faultBased on visible page data; confirm exact value in the RFQ.
Baud Rate
100/1000Mbps auto-negotiationBased on visible page data; confirm exact value in the RFQ.
Baud rate
100MbpsBased on visible page data; confirm exact value in the RFQ.
Bus Interface
1Based on visible page data; confirm exact value in the RFQ.

Buyer tips

  • State quantity range and split-delivery needs before price comparison.
  • Add certification, material or inspection standards when they affect acceptance.
  • For time-sensitive projects, include target arrival date and destination.
  • For special applications, describe operating condition, installation environment and duty cycle.

FAQ

What should buyers confirm first?

Confirm application, specification, quantity, destination and lead-time requirements before comparing offers.

Can buyers inquire when specs are incomplete?

Yes. Add model, material, size, use case and inspection needs in the RFQ to make replies comparable.

How should this listing be evaluated?

Check title, category, specifications and related keywords against the actual sourcing requirement.

Source mix: ugc

Product sourcing profile

CategoryPort And Wharf Equipment
Inquiry workflowPlatform RFQ workflow
AvailabilityInquiry required
Updated2026-05-04

Product introduction

Home Electrical & Electronics Electrical Control System Cotrust Simple Series PLC, Codesys Sp18 Platform CPU-C821-16N1, 8di/8do Transistor Drain Output, Supports 8 Axis Ethercat US$ Piece-led product discovery for buyers looking for plc, hmi and controllers options. The page is organized around specification review, application fit, and inquiry-ready comparison.When evaluating this product, buyers should confirm application fit, required performance range, installation environment, lead time, documentation, and whether the supplier can support OEM or project quotations. Current vertical focus: plc, hmi, sensors, drives, controllers, robots, and factory automation parts sourcing and rfq-ready export supply platform.plclogic

Selection and RFQ points

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Material fit Port Wharf Equipment

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Application fit application, operating environment and usage frequency

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Alternative path Hmi Controllers

Use nearby materials, equipment types or category pages when this record is close but not exact.

RFQ detail Quantity, destination, timing

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Key specifications

CategoryPLC, HMI and Controllers
Brand
Unitset
ApplicationElectrical and power distribution
Axis Capacity8 axes / 1ms 32 axes / 2ms
BF IndicatorRed ON = Bus fault, OFF = No fault
Baud Rate100/1000Mbps auto-negotiation
Baud rate100Mbps
Bus Interface1
CNCSupported Supported
CTSI-485/485/RTC-E1Two such modules can be expanded, slots are interchangeable Each slot can expand 2 RS485 interfaces, supports free protocols and Modbus RTU master/slave function
CTSI-485/CAN-E1One such module can be expanded, slots are interchangeable Expands 1 RS485 interface, supports free protocols and Modbus RTU master/slave function Expands 1 CAN interface, supports Canopen master protocol, expandable to 32 slave stations;supports CANFree
CTSI-4G-E1One such module can be expanded, slots are interchangeable Expands a slot supporting 4G cards, connecting a 4G SIM card enables 4G wireless communication
CTSI-AMS03-E2One such module can be expanded, slots are interchangeable Each slot can expand 2AI*12bit, 1AQ*12bit
CTSI-RTC-E1One such module can be expanded, slots are interchangeable Expands RTC clock, clock accuracy: ±120 seconds/month
Capacity0.35kg
CategoryPLC, HMI and Controllers
CertificationRoHS, ISO: 9001, CE
ConditionNew
CustomizationAvailable
CustomizedCustomized
Data Memory SpecificationI Area: 32K, Q Area: 32K, M Area: 512K
Digital Input8DI
Digital Input IndicatorGreen ON = Signal input detected, OFF = No signal input
Digital Output8DO
Digital Output IndicatorGreen ON = Signal output detected, OFF = No signal output
Dimensions53×104×80 mm
Dimensions(W×H×D)53×104×80 mm
Dual-phase Counters4×100KHz
Duty Cycle0.00 ~ 1.00 (two decimal places)
EtherCAT1
Ethercat Slave Stationsup to 72
Ethernet2
Expansion CardsSupports analog quantity, CAN, RTC, serial port, and 4G (4G expansion card will be added in the subsequent version)
Expansion Modules16 (Fully compatible with the entire simple series on the main unit) * *For weighing module adaptation, please
Expansion Slot2
Feature Highlightsdigital, automatic
Floating-point Instructions0.07us
Free port baud rate1.2Kbps ~ 115.2Kbps, built-in Modbus RTU master/slave function
FunctionAutomatic Control
Function DescriptionSupports arbitrary modification of points, supports internal pulse capture
Function Execution ResultDuty Cycle Result 1 Duty cycle is 100%, continuous ON output 0 Duty cycle is 0%, continuous OFF output
Input Circuits4
Input FilterConfigurable, supports 0.2us, 0.4us, 0.8us, 1.6us, 3.2us, 6.4us, 12.8us, 0.2ms, 0.4ms, 0.8ms, 1.6ms, 3.2ms, 6.4ms, 12.8ms. The default value is 6.4ms.
Input Points8
Input Power Supply ProtectionSupports Reverse Polarity Protection
Input TypeSink / Source
Isolation500V AC,1 minute
Local Monitoring/Local Programming FunctionSupported
Logic 0 (Maximum)5V DC
Logic 1 (Minimum)15V DC,>2.5mA
Logic Instructions0.015us
Matched Termsplc, logic
Max Number of Racks1
Maximum Allowable Leakage Current1mA
Maximum Cable Length per Segment100m
Maximum EtherCAT Axes8 32
Maximum Load Cable LengthShielded-500m-speed counter input) Unshielded-300m
Maximum cable length per segment100m
ModelCTSI-C821-16N1 CTSI-C823-16N1
Model NO.CTSI-C821-16N1
Number of Interfaces2
Number of Supported ProtocolsModbus TCP/IP master-slave protocol: Supports data reading from up to 32 slave stations EtherNet/IP protocol: Supports up to 253 stations*Note:
Number of interfaces1
Number of slave stations72
Number of slave stations per channel32 stations per segment
OriginChina
Output Circuits4(Pulse/Direction)
Output FrequencyResistive load-200KHz Inductive load-0.5Hz Electric lamp load-10Hz
Output LoadResistive load-0.5A/point, 2A/8 points Inductive load-7.2W/point, 24W/8 points Electric lamp load-5W/point, 18W/8 points
Output Points8
Output TypeTransistor sink output
PB IndicatorGreen ON = Expansion bus power supply normal, OFF = No expansion bus power supply
PPI baud rate9.6Kbps,19.2Kbps,187.5Kbps
PWR IndicatorGreen ON = 24VDC power supply normal, OFF = No 24VDC power supply
Period50~100000us
Power7.2w
Power off Hold Space512kb
Power-off Memory512K Byte 512K Byte
Power-on Indicator StatusBefore the CPU starts running: The PWR light is on, and all other lights (SF, BF, RMC, RUN) are off.
Product ModelC821
Product TitleCotrust Simple Series PLC, Codesys Sp18 Platform CPU-C821-16N1, 8di/8do Transistor Drain Output, Supports 8 Axis Ethercat
Program Capacity32M Byte 32M Byte
Program Space32MB
Programming LanguagesCFC/FBD/LD/IL/ST/SFC
Programming SoftwareCodesys-Sp18
Protection FunctionSurge voltage-35V DC, duration 0.5s
Pulse Axes4 4
RJ45 IndicatorGreen ON = Connected, OFF = Not connected
RMC IndicatorGreen Reserved
RS485Supports up to 5 channels (1 channel on main unit, expandable to 2 channels on expansion unit)
RUN Dual-color IndicatorGreen ON = System running, OFF = System stopped
Rated Input Power Supply Current1A
Rated Input Power Supply Voltage24V DC(20.4V~28.8V)
Rated Load Input Voltage24V DC( 20.4V~28.8V DC )
Rated Output Current0.5A
Rated Output Voltage24V DC(20.4~28.8V DC)
Remote Monitoring/Remote Programming FunctionSupported* *This function requires
SF IndicatorRed ON = System fault, OFF = No fault
SignalContinuous
Single-phase Counters4×200KHz
Size of Data Transmission per ProtocolModbus TCP/IP: Only one data transmission at a time, up to 240 bytes EtherNet/IP: No data limit*Note:;slave stati
SoftMotionSupported Supported
Software FunctionSupports hardware movement in the program without modifying the software program after point damage
Software VersionCODESYS SP )
Specification53*104*80(mm)
StructureCombination
Supported Protocol TypesSupports visualization WebVisu Supports MODBUS TCP master/slave functionality Supports Codesys tag-based communication Supports Socket functionality Supports PROFINET
Supported functionsSupports distributed clock configuration Supports startup parameter configuration Supports PDO parameter configuration and mapping Supports bus cycle configuration Supports vendor ID and product ID check at startup Supports slave station scanning Supports
TaskProgram
TrademarkCOTRUST
Transport PackageCTN
TypeC1
US$160.00-240.001 Piece (MOQ)
Voltage24v
Weight0.35kg
YellowON = System stopped, OFF = System running

Product sourcing keywords

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SOURCING DECISION BRIEF

Cotrust Simple Series PLC, Codesys Sp18 Platform CPU (C821) , CTSI-C821-16N1, 8di/8do Transistor Drain Output, Supports ...

This detail page turns one product record into a narrower sourcing decision with clearer category fit, adjacent routes and RFQ-ready context.

Category
PLC, HMI and Controllers
Price status
Quote on request
Inquiry model
Structured product RFQ with quantity, destination and technical requirements.
Availability
Confirm by inquiry
Sourcing lens
Product detail to shortlist decision
Primary compare
Category, Brand, Unit
Record focus
Cotrust Simple Series Plc, Codesys Sp18 Platform Cpu (c821) , Ctsi C821 16n1, 8di/8do Transistor Drain Output, Supports 8 Axis Ethercat
Category focus
Port And Wharf Equipment
Buyer checklist
  • Category fit: Confirm whether the product belongs to the right category and nearby application path before outreach.
  • Specification depth: Review the visible specifications and convert missing fields into a clearer RFQ requirement set.
  • Route expansion: Use adjacent category, solution and procurement routes before settling on one detail page.
How should buyers use this detail page?

Use the detail page as a product-fit checkpoint. Confirm category placement, visible specifications and adjacent sourcing paths before sending an RFQ.

What should buyers compare first?

Compare the visible specifications, category fit and the nearest application or solution routes before asking for supplier options.

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Capacity Confirm Capacity before comparing offers or moving the inquiry forward.
Material Confirm Material before comparing offers or moving the inquiry forward.
Application route Use Application to compare adjacent options instead of relying on one broad title match.
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Procurement notes

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