The 8550 transistor drive, driveability. A fixed bolt holes for easy installation. It has a relay status indicator led?Power LED(Green), 8 relay status indicator LED(Red) Relay control interface by single-chip IO. Low-level suction close, high-level release. Easy to use, simple 3 line structure.
Operating Voltage Range: 3.5V~10V Operating Current: 100mA@5V Operating Range: full range (>1.5km) Firmware Upgradeable Higher precision of PWM Lower latency on the PWM output Support redundancy function