Manual

USB TO RS232/485/TTL User Manual
Version：V1.3，Date：20181108 3 / 13
◼ Transmission distance: ~5m
⚫ RS485:
◼ Connector: screw terminal
◼ Pins: A+, B-, GND
◼ Direction control: hardware automatic control
◼ Protection: 600W lightning-proof and surge-suppress, 15KV ESD protection
(reserved 120R balancing resistor solder pads)
◼ Transmission distance: ~1200m
◼ Transmission mode: point-to-multipoints (up to 32 nodes, it is recommended
to use repeaters for 16 nodes or more)
⚫ RS232:
◼ Connector: DR9 male
◼ Protection: TVS diode, surge protection, ESD protection
◼ Transmission distance: ~15m
◼ Transmission mode: point-to-point
⚫ TTL (UART):
◼ Operating voltage: 3.3V/5V
◼ Connector: screw terminal
◼ Pins: TXD, RXD, GND
◼ Protection: clamp protection diode, over-voltage/negative-voltage proof,
shock resistance
◼ Transmission mode: point-to-point