The SER-4485-SI-M is an industrial-grade RS-232/485 to optically isolated 4-port RS-485 repeater/splitter/hub. This RS-485 hub is designed to expand a RS-485 channel in the RS-485 network to four RS-485 channels. It has one RS-232/RS-485 upstream input port and four independent downstream RS-485 output ports. Data received from the input channel will be simultaneously transmitted to all the four downstream RS-485 channels. Data received from the downstream RS-485 ports is forwarded back to the upstream port only, and is not sent to any other RS-485 ports in the loop. Each RS-485 output port is designed with an individual driver. The failure of any RS-485 ports in the downstream loop will not affect the normal function of the other RS-485 ports to ensure reliable operation.
The SER-4485-SI-M 4-Port RS-485 hubs can be added to RS-485 network to increase the maximum nodes up to 512 nodes of RS-485 devices and to increase the transmission distance more than 1.2km with stable and reliable performance.
The SER-4485-SI-M is optically isolated with 3000VDC optical isolation. The optical isolation protects your PC or RS-485 devices from spikes and surges on the RS-485 network, by converting the electrical pulse into an optical signal and then changing it back into an electrical pulse. Your computer or related RS-485 device is well protected, since the surges and spikes cannot cross the optical link. The SER-4485-SI-M is protected by surge protector to withstand electrostatic discharge and power surges up to 600W. Surge suppression on all signals prevent from damages caused by lightning or high voltage.