RS004, RS008, RS016 are serial data distributor and similar to a repeaters.
It gives serial data back on 4/8/16 outputs at the same time, allowing perfect configurations.
The transmission in RS485 and takes places at the same time on all 4/8/16 outputs.
The receiving mode of the input can be selected in RS485 or RS232.

RS016 RS485 Distributor 1 Input 16 Output In 1U Rack Mounting Panel
Input option: 1 x RS232, 2 x RS485 (3 input can be “stand by” status at the same time, but only one controller will be activated at once)
Output: 16 x RS485, each channel connection range up to 1200 meters by twisted pair cable.
Built in surge protection at each channel.
Each input/output is isolated.
Ability to cascade connection to other units RS004/RS008/RS016.
The application gives serial data back on 4 outputs at the same time, to provide perfect configurations.
Power supply included.