Features 1、Relay supports six working modes including on, off, jog, self‑lock, 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: Relay Working Voltage: DC 12V Working 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 224MA Default Baud Rate: 9600BPS Select Baud Rate through Jumper: 2400, 4800. 19200BPS Size: 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: UM72 Color: Green Width: Suitable for circuit board width UM72 (inside 72) Insulation Class: Flame retardant VO level Base Plate Length: Suitable for 10 cm circuit board Net Weight: Approx. 72 g / 2.5 oz Installation Method: DIM35 and C45 rail Weight: 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)