1. Industrial grade design, complete communication isolation, Durability-Optimized and transmission speed up to 115.2Kbps.
2. Built-in DC/DC isolated power supply module to achieve electrical isolation between ports.
3. Support communication between multiple machines, each channel can connect up to 128 nodes, and the longest transmission distance is 2500 meters.
4. Automatic data control technology, automatically distinguishes and controls the direction of data transmission.
5. Multiple protection measures, plus or minus 15KV ESD protection, 600W dual-channel TVS protection, 2.5KV communication isolation.
6. The power supply has a wide range of 9-24VDC and features anti-reverse protection.

Specification:
Item Type: Repeater
Compatibility: Compatible with RS-232, RS-485TIA/EIA standards
Rated power: 0.5-1.2W
Input interface: 1 RS-232/1
Output Interface: 4
Load capacity: 128 nodes per interface
Communication distance: 2500 meters of shielded cable or twisted pair cable per interface
Communication speed: 300bps-115.2Kbps
Installation method: 35mm rail installation, 4-hole backplate installation
Frame size: Approx. 115 x 90 x 40mm/4.5 x 3.5 x 1.6in
Working environment: -30℃ to 70℃ relative humidity>95% RH
Wiring Notes:
1. The 485 communication line should use shielded twisted pair, preferably several spare wires, the longest does not exceed 2500 meters.
3. The 485 bus should be a hand-held bus structure and resolutely eliminate the star connection and branch connection.
4. If more than 30 controllers or the cable length is more than 500 meters, it is recommended to use a 485 repeater.
5. AC powered equipment and chassis must be grounded and well grounded.
6. Connect the GND ground of all 485 devices with shielded cables.
Requirements for selecting cables using the bus for communication:
Use 2-core shielded twisted pair cable
Copper, wire diameter 0.5～0.75 square millimeters,
Impedance 38～88Ω/km,
Capacitive resistance 30～50nF/km,
2-core shielded twisted pair cable with a twist distance of 20mm (if the line distance is not more than 500 meters, the line standard can be reduced appropriately, but it must be twisted pair)
Common ground signal:
1. All devices on the same network segment must have a unified signal ground to avoid common mode interference.
2. For a centralized power supply, directly connect the DC negatives of all power supplies on the same network segment (including self-contained power supplies of communication equipment) to form a common signal ground.
At this time, the signal ground is the DC power ground.
3. When a single house supplies power, connect the ground pins (black wire) of all bus devices on the same network segment to form a common signal ground.

Packing List:
1 repeater.

Notes:
The device is suitable for long-term stable operation below the recommended value; The device will not be damaged when operating below the limit value, but may cause performance degradation; Do not exceed the limit value range at any time, otherwise you may damage the device!