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 contactCOM Relay common contactNC Relay normally closed contactOpen NO connection COM NC disconnect COMClose NO disconnect COM NC connection COMMomentary 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 Id