ITEM NAME:4CH 12V Modbus PC RTU UART RS485 Relay Board for PLC Lamp LED PTZ Camera Control 100% brand new and high quality DC 12V 4Channel DTMF Relay Phone Voice Decoder Remote Controller Switch Module DC 12V 4Ch RS485 Modbus AT command Relay Board DC 12V power supply (voltage range 9-13V ) Standby current (all relays closed) 11-13MA, 1 relay open 44MA, 2 relays open 77MA, 3 relays open 110MA,4 relays open 140MA "open" "close" "Momentary" "Self-locking" "Interlock" "Delay" 6 Commands Two instruction-control mode : AT command and MODBUS command Under the AT command ,the maximum delay is 9999 seconds Under the MODBUS command ,the maximum delay is 255 seconds AT commands can be made serial HyperTerminal (serial assistant) Enter;MODBUS commands can be made serial HyperTerminal (serial assistant) OR "Modbus Poll" Enter; Under the MODBUS command mode, it can support up to 32 devices in parallel 10 Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC Typical applications: Automated industry PLC Smart Home,Home Automation ,Wiser Home; Identification system; PTZ Camera Control Motor FW & BW Board size(L*W):8.00cm*4.70cm/3.15"*1.85" Quantity:1Pc 1Pc x 4 Channel Control Switch (not included the phone).(DC 12V 4Ch RS485 Modbus AT command Relay Board. Under the MODBUS command ,the maximum delay is 255 seconds. assistant) OR "Modbus Poll" Enter;. Under the MODBUS command mode, it can support up to 32 devices in parallel.
