Standard transmission speed is 9600BPS; you can select transmission speeds of 2400, 4800, or 19200 BPS via the jumper. Supports up to 64 devices in parallel operation. AT commands can be entered via the serial port's super terminal (serial assistant). Features six working modes: open, close, jogging, self-locking, interlock, and delay. Compact size, easy to carry and store, convenient to use, and offers good performance. Strict quality control and assurance, with a high safety factor for peace of mind. Item Type: Rail Box Relay Working Voltage: 12V Working Current: Standby 13MA 1 Relay Energized: 41MA 2 Relays Energized: 69MA 3 Relays Energized: 95MA 4 Relays Energized: 121MA 5 Relays Energized: 149MA 6 Relays Energized: 175MA 7 Relays Energized: 199MA 8 Relays Energized: 225MA 8 photoelectrically isolated input ports (NPN is active at low level). Input/output relationships can be set to associated (default) or unassociated via commands. Working Mode: Open, Close, Jog, Self-Lock, Interlock, Delay (6 types) AT commands can be entered via the serial port's super terminal (serial port assistant). Default baud rate: 9600BPS; you can select transmission speeds of 2400, 4800, 19200 BPS via the jumper.