Description

Description

First, the product overview

The MBSL8DI8RO module is an 8-channel digital isolated input and 8-channel digital relay isolated output module, which is output through an isolated RS485 interface. The module adopts standard Modbus RTU communication, which can directly adapt to various PC configuration software, PLC, DCS and so on. The module power supply and RS485 communication electrical signals are isolated from each other, effectively suppressing various types of series mode and common mode interference, and also ensuring stable and reliable operation of the module.

1, using RS485 MODBUS RTU standard communication, can be connected with the host computer configuration software, PLC, industrial touch screen, etc., with communication status indicator

2. Industrial grade standards: electrical signals such as signal control, power supply, and RS485 communication are isolated from each other.

3. The communication circuit adopts lightning protection, anti-interference design and power polarity protection.

4, RS485 communication signal output interface uses overvoltage and overcurrent double protection.

5, can be widely used in industrial field equipment signal acquisition and control.

6. Output network protection: When the slave station detects that the master station has not sent data for more than the set time, it automatically resets the output to protect the field equipment. Default no network protection function, can be selected by setting

7. The communication format can be set by software.

Second, the main technical indicators

Project	Technical indicators
Signal input/output	1, input channel: 8 digital inputs 2, output channel: 8 relay output 3, load capacity: resistive load 5A / channel
Communication output	1. Communication protocol: MODBUS-RTU 2. Interface type: isolated RS485 communication, output interface with overvoltage and overcurrent double protection 3. Baud rate: 4800bps, 9600bps, 19200bps, 38400bps, 57600bps 4. Check digit: no parity, even parity, odd parity 5. Setting method: module address, baud rate, check digit can be set by software 6. Communication distance: @9600bps 1200 meters
Module size and installation method	1. Installation method: standard DIN rail mounting or screw mounting 2. Dimensions: 125×73×35mm
working environment	Temperature: -10 ~ +60 ° C Humidity: 35 ~ 85% (no condensation)
Working power	1. Power supply voltage: 10V ~ 28V wide range power supply, with power polarity protection 2. Power consumption: less than 3W

V. Communication instructions

1, communication parameter description (factory value): 9600, N, 8, 1

Parameter	Description
9600	Baud rate
N (no parity)	Check Digit
8	Data bit
1	Stop bit

Chapter 2 Modbus Register and Communication Protocol Description

One. MODBUS function code and address range supported by the module

1. MODBUS function code supported by the module

Register type	Address range	function code	Function code description	Operation
Output coil register	00001-00008	0x01H	Read multiple coil registers	Read the value of one or more coil registers
		0x05H	Write a coil register	Write the value of a coil register
		0x0FH	Write one or more coil registers	Write the value of one or more coil registers
Holding register	40001-40016	0x03H	Read multiple holding registers	Read the value of one or more holding registers
		0x 06H	Write a single holding register	Write a data to the holding register
		0x 10H	Write multiple holding registers	Write one or more data to the holding register
Input digital quantity	10001-10008	0x02H	Read input discrete	Discrete input register

two. Register definition description

1. Output coil register (function code: 0x01H, 0x05H, 0x0FH)

address	parameter	length	Read/write	MIN	MAX	Description
00001	DO1	1	Read/write	0	1	Digital output bit 1 status
00002	DO2	1	Read/write	0	1	Digital output bit 2 status
00003	DO3	1	Read/write	0	1	Digital output bit 3 status
00004	DO4	1	Read/write	0	1	Digital output bit 4 status
00005	DO5	1	Read/write	0	1	Digital output bit 5 status
00006	DO6	1	Read/write	0	1	Digital output bit 6 status
00007	DO7	1	Read/write	0	1	Digital output bit 7 status
00008	DO8	1	Read/write	0	1	Digital output bit 8 status

2. Holding registers (function codes: 0x03H, 0x06H, 0x10H)

address	parameter	length	Read/write	MIN	MAX	Description
40001	DI (1~8)	2	Read only	0	0xff	Read the status of an 8-bit digital input
40002	DO (1~8)	2	Read/write	0	0xff	Control the state of the 8-bit digital output
40003	Device address	2	Read/write	1	247	1 (default)
40004	Baud rate	2	Read/write	1	5	1 (4800) 2 (9600) default 3 (19200) 4 (38400) 5 (57600)
40005	Check Digit	2	Read/write	1	3	1 (no parity.) default 2 (odd check) 3 (even parity)
40006	Network protection time setting	2	Read/write	1	2000	If it is set to >=1800, the network protection function is cancelled, and the 0-1799S range is the network protection time. After this time, the DO output is reset.
40007	product version	2	Read only	0	--	Year + month + day

3. Discrete input register (function code: 0x02H)

address	parameter	length	Read/write	MIN	MAX	Description
10001	DI1	1	Read only	0	1	Digital input bit 1 status
10002	DI2	1	Read only	0	1	Digital input bit 2 status
10003	DI3	1	Read only	0	1	Digital input bit 3 status
10004	DI4	1	Read only	0	1	Digital input bit 4 status
10005	DI5	1	Read only	0	1	Digital input bit 5 status
10006	DI6	1	Read only	0	1	Digital input bit 6 status
10007	DI7	1	Read only	0	1	Status of digital input bit 7
10008	DI8	1	Read only	0	1	Digital input bit 8 status

Chapter III Product Configuration

One. Communication settings

1. Default factory communication parameters

project	Register address	Description	Defaults
address	40003	1 (default)	1
Baud rate	40004	1 (4800) 2 (9600) default 3 (19200) 4 (38400) 5 (57600)	2
Check Digit	40005	1 (no parity.) default 2 (odd check) 3 (even parity)	1
Data bit	---	Not adjustable	8 digits
Stop bit	---	Not adjustable	1 person

2. Reset communication parameters

1. In order to prevent the user from forgetting the set communication parameters, the module cannot communicate with the module. The recovery initialization function was deliberately designed.

2. Hold the "key" on the back of the module with the toothpick for more than 3 seconds, until the red light of the module "RUN" flashes and press and hold the button. The RUN light flashes 3 times and then returns to normal (running state). Factory settings. Then, after the module is powered off and the power is turned back on, the communication parameters have been reset to the default values.

Second, the communication indicator description

1. After the module is powered on, the red working indicator of the module “RUN” is always on. When the reset button is pressed, it will flash three times at 1 second intervals.

2. In the module communication, the communication indicator flashes according to the received data “RXD”, and the data “TXD” flashes regularly after the CPU processes. When the communication is not normal, the flashing status will flash abnormally to determine the cause of the communication failure.

Third, the host computer debugging instructions

This module provides a standard modbus debugging software to implement the function debugging and parameter setting of the module. Please follow the steps below:

l Connect the computer and module with RS485 converter

l Connect the 24V external power supply to the module and power it on. To avoid unnecessary damage, please check whether the positive and negative terminals of the power supply are connected correctly before powering on.

l Open the file edited by the debugging software, set the correct communication parameters, open the communication port, and enter the function debugging or parameter setting interface.

l Select the appropriate settings, acquisition and control options

Note: When wiring the module terminals, it is recommended to remove the terminal strips first, then plug them in again. And check according to the wiring diagram and the wiring symbol on the module, and then power on again after confirming the error.

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