Ethernet port expansion
Although more and more devices are now Ethernet-ready, many legacy devices only provide a serial interface. The main purpose of device servers is to connect serial devices to Ethernet, allowing engineers to integrate all devices into an Ethernet environment. A problem can arise if both Ethernet-ready and legacy serial devices need to be connected from the same location. The NPort 6450
and NPort 6600 can use the Ethernet expansion module to add additional Ethernet ports, effectively allowing operation as a combination Ethernet switch/ device server. By using the NPort's Ethernet expansion modules, users no longer need to invest in a more expensive switch or hub to connect every device. Modules are available for different Ethernet media, including copper Ethernet, multi-mode fiber, and single-mode fiber. Ethernet expansion modules can also be used to create a cascading topology in which device servers are connected to each other in a daisy chain arrangement.
Moxa also offer the latest expansion modules, the NM-GPRS/GSM and NM-Modem network modules. They can be used to provide NPort 6450
and NPort 6600 device servers with an automatic backup capability. When the backup function is enabled, the
NPort will check the remote host connection on the Ethernet side after powering on. Once a connection failure has occurred, data from the serial device will be sent out through the GSM/GPRS and PSTN network. When the remote host on the Ethernet side returns to normal status, data will again be sent through the Ethernet connection. The NPort 6450
and NPort 6600's backup function makes data transmission safer and more reliable.