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Product Name : 2 in 1 15ch RS485 RS232 Modbus RTU Relay PLC DO Board Serial Port Switch Controller with TVS ESD Protection
Package included:
1 PCS DC 12V/24V N438C15 15 Channel RS485 /RS232 Modbus Rtu Relay Board
Feature:
Operating voltage: DC 12V (12V version); 24V (24V version)
Operating current: Standby 14MA, 1 relay guide 44MA, 2 relays 69MA, 3 relays 95MA, 4 relays 121MA, 5 relays 149MA, 6 relays 175MA, 7 relays 199MA, 8 relays 226MA, etc
''open'' ''close'' ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay'' 6 Commands
MODBUS command supports 03 06 16 function code
Maximum delay of 255 seconds under the MODBUS command
MODBUS commands can also be input by ''Modbus Poll'' in addition to the serial port super terminal input.
In MODBUS command mode, up to 64 devices can be used in parallel
The default baud rate is 9600BPS, the baud rate can be selected by jumper 2400 4800 19200 38400 57600 115200BPS
The check method can be selected as no check, even check and odd check
The data sending return time can be set, the maximum can be set to 1000ms
Dimensions 173*96*20mm (circuit board) 179*108*48mm (with rail box):
Weight: 250.5g (circuit board); 415g (with rail box)
Maximum load:10A/250VAC ,10A/125VAC,10A /30VDC, 10A /28VDC ,10A /12VDC
Function Description:
NO : Relay normally open contact
COM : relay common contact
NC : Relay normally closed contact
''Open'' :The NO connects to the COM, and the NC disconnects the COM
''Close'' :The NO disconnects the COM, and the NC connects to the COM
Crawl :Enter the tap command, with the relay ''on'' and ''off'' after 600 ms
Auto-lock :Enter the self-lock command, the relay ''on'', enter the self-lock command again, the relay ''off'', and so on
delay :Input the delay command, the relay ''turns on'', after waiting for the set time, the relay ''turns off''; during the delay period, after the turn-off command is input, the relay turns off immediately
 
Slave address:A0-A5 are slave addresses, and 64 different slave addresses can be selected. In the MODBUS command mode, the slave address of the MODBUS command must be the same as the dial code of A0-A5 to communicate.
 
Refer to the ''N438C15 15-channel Modbus rtu Command''
 
Typical application
1.Control an individual module
2.MODBUS command mode (HEX), there are various control methods: serial port hyperterminal control (need to manually add CRC check code), Modbus Poll software control (software automatically adds CRC check code), PLC or microcontroller program control
Wiring diagram
1 Power supply DC12V/24V, load DC 12V/24V circuit, wiring as shown below. Load ''LOAD'' can be LED lights, fans, motors, cameras and other DC 12 V/24V devices
2 Power supply DC 12V/24V, load DC 1-100V or AC 85-265V, wiring as shown below. The load ''LOAD'' can be DC 1-100V or AC 85-265V equipment such as LED lights, fans, electric lamps, fluorescent lamps, solar water heaters, etc.
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