Feature: 1. The default baud rate is 9600BPS, you can select the baud rate 2400 4800 19200 BPS through the jump line. 2. There are open, close, jog, self‑lock, interlock, delay, interlock between the two channels, seven working modes. 3. The relay module has 12 optically isolated input ports, and the NPN is active at low level. 4. The input-output relationship can be set to be associated (default) and not associated with instructions. 5. Strict quality control and quality assurance, high safety factor, can be used with peace of mind. Specification: Item Type: Relay Module Working Voltage: DC 24V Working Current: Standby 14MA 1 relay conducts 44MA 2 relays conduct 69MA 3 relays conduct 95MA 4 relays conduct 121MA 5 relays conduct 149MA 6 relays conduct 175MA 7 relays conduct 199MA 8 relays turn on 226MA, etc. Ports: 12 optically isolated input ports (NPN is active at low level). The input/output relationship can be set to be associated (default) and not associated with instructions. 7 Working Modes: Open, close, jog, self-lock, interlock, delay, interlock between two channels The Default Baud Rate: 9600BPS, you can select the baud rate 2400 4800 19200 BPS through the jump line. Size: Approx. 180 x 72 x 20mm / 7.1 x 2.8 x 0.8in (circuit board); Weight: Approx. 190 g / 6.7 oz (circuit board); Weight: Approx. 318 g / 11.2 oz (box with guide rail) Maximum Load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC. Package List: 1 x Relay Module Note: The use of the 12‑channel RS48 controller and the 2‑channel RS485 relay are the same.