Feature: 1. Supports six working modes including on, off, jog, self‑lock, interlock and delay, the relay is easy to use. 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. AT command can be input by serial port super terminal (serial port assistant). 5. In the default command mode, the relay can connect up to 64 devices in parallel. Specification: Item Type: Relay Features: 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 Relay on 200MA, 8 relays on 225MA, etc. Default Baud Rate : 9600BPS Baud Rate Selected Via Jumper: 2400, 4800, 19200BPS Size: Approx. 180 x 72 x 20mm / 7.09 x 2.83 x 0.79in (circuit board) Approx. 184 x 88 x 42mm / 7.24 x 3.46 x 1.65in (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 circuit board width UM72 (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 List: 1 xRS485 Relay (with DIN rail box)