Industrial-grade design, communication is completely isolated, stable and reliable performance, transmission rate is up to 500Kbps Built-in high-quality DC/DC isolated power module realizes electrical isolation between ports Support multi-machine communication, can connect up to 128 nodes, and the transmission distance can reach 1200 meters Automatic data flow control technology, automatically distinguish and control the direction of data transmission Multiple protection measures: 15KV positive and negative ESD protection; 600W dual-channel TVS protection; Communication isolation 2.5KV Recommended value (typical) Limit value Working voltage 9V ~ 36V DC 9V ~ 36V DC Rated power 0.36W (9V/35mA; 12V/27mA; 24V/15mA) 0.5W Working temperature -30 ~ 70 -40 ~ 80 Capacity manager 1 ~ 128 node 128 node Communication distance 0 ~ 1200 meters 1200 meters Communication rate 300-500,000 bits/s 500 Kbps Wiring note: 1. 485 communication wires should be shielded twisted pair. It is best to have several spare strands, and the total length does not exceed 1,200 meters. 2. The wires should be as far away from the high-voltage wires as possible, do not parallel with the power cord, and do not bundle together. 3.485 bus should be hand-held bus structure, and should not be star connection and fork connection. 4. 485 repeater should be used when there are more than 30 controllers or the wire is longer than 500 meters. 5. The equipment and AC power box should be well grounded. 6. Connect GND of all 485 devices with shielded cable. 7. Connect 120 ohm terminating resistor in parallel to 485+ (A) and 485- (B) of the last 485 device.