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Product details

CT-5321 Modbus Serial Port Module

Module Description

The Modbus serial port module supports 1 channel RS485/RS232 /RS422(optional), supports Modbus RTU/ASCII protocol, and supports master, slave and free transparent transmission mode.

The serial Module CT-5321 could be applied with the adapter modules, so it could convert Modbus into other protocols such as Modbus TCP, Profinet, EtherCAT, EtherNet/IP, etc. When the module is used, serial port parameters and Modbus instructions should be configured in IO Config software.

Devices with RS485/RS232/RS422 interface, which support modbus-RTU/ASCII, could be applied with CT-5321 to realize interconnection with upper PLC or upper computers. CT-5321 could be applied with devices such as: PLC, DCS, remote IO, VFD, motor start protection device, intelligent high and low voltage electrical apparatus, power measurement device, intelligent field measurement equipment and instruments, etc.

Technical Parameters

General parameters
Power	Max.500mA @ 5.0Vdc
Isolation	I/O to internal bus: opto-couple isolation (3KVrms)
Field Power	Nominal:24Vdc, Range:19.2-28.8Vdc
Wiring	I/O Wiring： Max.1.5mm²(AWG 16)
Mounting Type	35mmDIN-Rail
Size	1151475mm
Weight	65g
Environment Specification
Operational Temperature	-35~70℃
Operational Humidity	5%~95% RH(No Condensation)
Protection Class	IP20
Serial Port Parameters
M/S/F:Channel Number	1Channel
M/S/F:Interface	RS485/RS232/RS422
M/S:Protocol	Modbus RTU/ASCII
M/S/F:Working Mode	Modbus Master, Slave, Transparent Transmission
M/S/F:Baud Rate	300bps-500Kbps
M/S/F:Data Bit	Bit 7, Bit 8
M/S/F:Parity Checking	None, Odd, Even
M/S/F:Stop Bit	Bit1, Bit2
M/S/F: Character Interval	1.5t-200t
F: Byte Order Conversion	Prohibit, Enable
M/F:Response Timeout	Customized， default： 1000
M/F: Polling Timeout	Customized， default： 100
M: Read Data Processing Mode	Hold the last input value, clear the input value
M: Data Output Mode	Polling, event triggering (data changes)
M: Module Control Enable	Prohibit, Enable
M: Module Control Mode	Level trigger (continuously valid), rising edge trigger (single valid)

Note: M represents the valid parameters of master mode, S represents the valid parameters of slave mode, and F represents the valid parameters of free transparent transmission mode

Application scenarios:

FQA

Q：Supported serial protocols?

A：Modbus RTU/ASCII, supports master/slave/transparent modes.

Q：Supported function codes?

A：1,2,3,4,5,6,15,16.

Q:Applications?

A: Communication with sensors, actuators, and industrial devices. ODOT Solutions

Certifications & Quality Assurance:

ODOT products comply with international industrial standards, including CE and RoHS, and undergo strict quality control to ensure long-term reliable operation in industrial environments.

Technical Support

Fast Delivery

ODOT maintains sufficient inventory for standard models.

Most products can be shipped within 1-3 working days, helping customers accelerate project schedules.

Professional technical support and application assistance are available throughout the project lifecycle.

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Our Team

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Sichuan Odot Automation System Co.,Ltd

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4 month

Main Product: PLC, Remote IO Modules , Remote IO Coupler Adapter, Protocol Converter, Industrial Ethernet Switch, gateway

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