3pcs DC 12V RS232 Serial Port Delay Relay Switch Module PC COM DB9 ARM MCU UART Remote Control Board

Description: - Working voltage: 12V - (DC12V)Standby current (all relays closed) 16MA, relay open 47MA, - Two serial ports: RS232 DB9 interface, TTL 232 interface - ''Open'' ''Close'' ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay''(Only AT command) 6 Commands - Two kinds of commands: AT command and 8-byte command, the two commands are automatically recognized, no need to switch. - Under the ''Delay'' command ,the maximum delay is 9999 seconds(Only AT command) - Size: 56.5 *31.5 * 17.5mm - Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC Glossary: NO: Relay normally open contact COM: Relay common contact NC: Relay normally closed contact Open: NO connection COM, NC disconnect COM Close: NO disconnect COM, NC connection COM Momentary : Enter the Momentary command, the Rreceiver Relay is Open, delay of 0.5 seconds after, Relay is Close; Toggle : Enter the Toggle command, the Rreceiver Relay is Open, Enter the Toggle command again, Relay is Close; Latched : Enter the Channel 1 Latched command, the receiver Channel 1 is Open, the Channel 2 is Close. Enter the Channel 2 Latched command the receiver Channel 2 is Open, the Channel 1 is Close. Delay : Enter the Delay command, the Rreceiver Relay is Open, delay of 0-9999 seconds(MODBUS command is 0-255 seconds )after, Relay is Close; During the delay, Eter the Close command, immediately close the relay Application: Remote control, remote measurement system; Wireless meter ; Smart Home,Home Automation ,Wiser Home; Access control ; Identification system ; Data collection; IT household appliance ; Intelligence household appliance; Baby monitoring system; PLC Industrial control; LED Lighting control. Package Incldued: 3 x DC 12V RS232 Serial Port Delay Relay Switch Module