Versatile Modes: Supports six working modes including on, off, jogging, self-locking, interlocking, and delay, making the relay easy to operate. Dual Command Control: Features two command control modes for flexible operation. Extended Delay: The standard command offers a maximum delay of 255 seconds, while the AT command allows for an impressive maximum delay of 9999 seconds. AT Command Input: The AT command can be conveniently entered via the serial port super terminal (serial port assistant). Parallel Device Support: In standard command mode, the relay can connect up to 64 devices in parallel. Item Type: Relay Model: R4D3B16 / R4D3B16-R with DIN rail (optional) Features: Working Voltage: DC 12V Operating Current: Standby 13MA, 1 relay on 41MA, 2 relays on 69MA, 3 relays on 93MA, 4 relays on 121MA, 5 relays on 149MA, 6 relays on 175MA, 7 relays on 200MA, etc. Default Baud Rate: 9600BPS Selectable Baud Rates via Jumper: 2400, 4800, 19200BPS Size: Approx. 180 x 72 x 20 mm / 7.09 x 2.83 x 0.79 inches (circuit board) Approx. 184 x 88 x 42 mm / 7.24 x 3.46 x 1.65 inches (box with rail) Weight: Approx. 230 g / 8.1 oz (circuit board) Approx. 358 g / 12.6 oz (box with rail) Maximum Load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC DIN Rail Box Parameters: Product Model: UM72 Color: Green Width: Suitable for UM72 circuit board width (72 cm) Insulation Class: Flame retardant VO level Base Plate Length: Suitable for 18 cm circuit board Net Weight: Approx. 128 g / 4.5 oz Installation Method: DIN35 and C45 rail Package Includes: 1 x RS485 Relay (with DIN rail box)