2N Access Unit QR, Руководство пользователя, Страница: 100 / 128

Figure 2. Wiring diagram of IN1
terminals in active mode Figure 3. Wiring diagram of IN1
terminals in passive mode
LAN Connection
2N Access Unit QR is connected to the LAN by inserting a SSTP cable (category Cat-5e or higher) in the
dedicated LAN connector on the device. As the device is equipped with the Auto-MDIX function, you can use
either the straight or crossed cable version.
CAUTION
• We recommend the use of a LAN surge protection.
• We recommend the use of a shielded SSTP Ethernet cable.
Overvoltage Protection
The 2N device cables have to be protected against atmospheric overvoltage caused by external causes
(lightning, e.g.). A surge can damage a device installed outside/inside the building if the wires are unprotec-
ted.
Therefore, we recommend that additional overvoltage protectors (OVP) be installed on the outer walls or
roof for all the wires leading outside the building. Keep the following instructions while installing overvoltage
protectors:
• Make sure that the overvoltage protector is installed as close as possible to the device installed outside the
building.
• Make sure that the overvoltage protector is installed as close as possible to the device installed on an
external part of the building.
• Make sure that the overvoltage protector is installed as close as possible to the point where the cabling
leaves the building.
Installation
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