Features:

• Built-in advanced microprocessor, strong anti-jamming capability;
• Receive signal: 1, passive switch one way; 
                               2, RS485 communication alarm signal;
• Output signal: DC pulse signal, AC pulse signal, passive switch signal;
• Display: High Brightness LED
• Alarm information is automatically maintained until the system is reset to facilitate unattended;
• the Company XH-G300A, XH-G300B series controller supporting the use of