Advantech EKI-2528PAI, Руководство пользователя

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17 Chapter2
2.4 Network Connection
The EKI-2528PAI has 6 x RJ-45 ports that support connection to 10 Mbps Ethernet, or
100 Mbps Fast Ethernet, and half or full duplex operation. EKI-2528PAI can be
connected to other hubs or switches through a twisted-pair straight through the cable
or a crossover cable up to 100m long. The connection can be made from any TX port
of the EKI-2528PAI (MDI-X) to another hub or switch either MDI-X or uplink MDI port.
The EKI-2528PAI supports auto-crossover to make networking more easy and flexible.
You can connect any RJ-45 (MDI-X) station port on the switch to any device such as a
switch, bridge or router.
2.5 Power Connection
The EKI-2528PAI supports dual 48 V
DC
power inputs and power-fail relay output.
Figure 2.8: Pin Assignment of the Power Connector
You can connect an alarm indicator, buzzer or other signaling equipment through the
relay output. The relay opens if power input 1 or 2 fails (‘Open’ means if you connect
relay output with an LED, the light would be off).