Feature: 1. The default baud rate is 9600BPS, you can select the baud rate 2400 4800 19200 BPS through the jumper. 2. Can support up to 64 devices to be used in parallel, AT commands can be input by the serial port super terminal (serial assistant). 3. There are six working modes: open, close, jog, self-lock, interlock, and delay. 4. Small size, easy to carry and store, convenient to use and with good performance. 5. Strict quality control and quality assurance, high safety factor, can be used with peace of mind. Specification: Item Type: Rail Box RelayWorking Voltage: 12V Working Current: Standby 13MA 1 Relay Conducts: 41MA 2 Relay Conducts: 69MA 3 Relay Conducts: 95MA 4 Relay Conducts: 121MA 5 Relay Conducts: 149MA 6 Relay Conducts: 175MA 7 Relay Conducts: 199MA 8 Relay Conducts: 225MA 8 photoelectrically isolated input ports (NPN is active at low level), and the input/output relationship can be set to associated (default) and non-associated through commands. Working Mode: Open, close, jog, self-lock, interlock, delay (6 types) AT commands can be input by the serial port super terminal (serial port assistant) The Default Baud Rate: 9600BPS, you can select the baud rate 2400 4800 19200 BPS through the jumper.. Package List: 1 x Rail Box Relay Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.