Feature:1. Relay supports six working modes including on, off, jog, selflock, interlock and delay.2. There are two command control modes.3. The maximum delay of the default command is 255 seconds, and the maximum delay under the AT command is 9999 seconds.4. In the default command mode, the relay can connect up to 64 devices in parallel.5. AT command can be input by serial port super terminal (serial port assistant).Specification:Item Type: RelayWorking Voltage: DC 12VWorking Current: standby 12MA, 1 relay on 40MA, 2 relays on 68MA, 3 relays on 94MA, 4 relays on 120MA, 5 relays on 148MA, 6 relays on 174MA, 7 Relay on 199MA, 8 relays on 224MADefault Baud Rate: 9600BPSSelect Baud Rate through Jumper: 2400, 4800. 19200BPSSize: Approx. 100 x 72 x 20mm / 3.94 x 2.83 x 0.79in(circuit board)Approx.100 x 88 x 42mm / 3.9x 3.46 x 1.65in (box with rail)DIN Rail Box Parameters:Product Model: UM72Color: GreenWidth: Suitable for circuit board width UM72 (inside 72)Insulation Class: Flame retardant VO levelBase Plate Length: Suitable for 10 cm circuit boardNet Weight: Approx. 72 g / 2.5 ozInstallation Method: DIM35 and C45 railWeight:Approx.120 g / 4.2 oz(circuit board)Approx.198 g / 7 oz(box with rail)Maximum Load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC.Package List:1 x 8-Channel RS485 Relay (with DIN rail box)