Product Name: 8CH DC 5V 12V 24V RS485 RS232 (TTL) Modbus RTU UART Control Module for PLC Relay Switch Board.
Package included:
1 x 5V / 6-8 Channel RS485 Multifunction Control Board for 24V 1-8 Channel Relay Module

Description:
1: Operating voltage: DC 5V (5V version) / DC 6-24V (6-24 version)
2: operating current: 10-15mA
3: '' 'open' '' close '' '' momentar '' '' Self-locking '' '' interlock '' '' 'delay' '6 commands
4: Two instruction control modes: AT command and MODBUS command.
5: Under AT command, the maximum delay is 9999 seconds
Under the MODBUS command, the maximum delay is 255 seconds
6 AT commands can be done as serial hyperterminal INPUT (Serial Assistant);
MODBUS commands can be done as serial hyper-terminals (serial assistant) or MODBUS input.
7. Under MODBUS command mode, it can support up to 247 devices in parallel.
8 with RS485 and RS232 (TTL) dual bus interface
9 output control pins 8, 5V TTL level, low level (default) / high level output
10 sizes: 45x30x15mm
11.Weight: 10g
Instruction manual please consult us after purchase
App
Industrial Automated PLC
Relay module
Smart Home, Home Automation;
Identification system;
FW and BW motor;
CCTV Control PTZ Camera;
Security system;
LED dot matrix display;
RS485 remote control;


Command mode selection: (figure above) M0 trip is MODBUS command mode. The M0 connection is in command mode.
Output level selection: (figure above) M1 cutout is low level output. The M1 connection is a high level output
Slave ID: different "chip ID" can be set by command, the maximum number is 247
Under MODBUS command mode, the slave identifier must be correct.
Command description, see "8-channel RS485 multifunction module".
Typical applications:
1 In command mode (M0 connection), in this mode you can enter via the serial hyperterminal (Serial Assistant) into a simple AT command control relay. In command mode time up to 9999 seconds




3 MODBUS command modes (M0 disconnection), you can control a variety of ways: Hyper Serial Terminal control (need to manually add the CRC), Modbus Poll software control (automatically add the CRC software), PLC or MCU process control.


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