Siemens SCALANCE W788-1 Operating Instructions Manual page 34

Connecting up
6.3 Antenna connectors
N-Connect for degree of protection IP65
The variants of the SCALANCE W7x8 M12 have antenna sockets of the type N-Connect:
● Variants with an IWLAN interface (W7x8-1) have 3 antenna sockets on the top of the
device.
● Variants with two IWLAN interfaces (W788-2) have 6 antenna sockets, 3 on the top and 3
on the underside of the device.
When you install the SCALANCE W7x8 in a cabinet, detached antennas must be used due
to the restricted communication. Suitable connecting cable for a connection between
SCALANCE W7x8 and a detached antenna are available from SIMATIC NET. You will find
detailed information in the following section.
Note
If both interfaces of access points with two IWLAN interfaces are operated in the same
frequency range,
• the distance between the antennas connected to R1A1, R1A2, R1A3 and those
connected to R2A1, R2A2, R2A3 must be at least 1 m.
• there may be wireless interference on one or both IWLAN interfaces if the transmit power
is higher than 15 dB.
Note
Terminating resistor
Each WLAN interface has three antenna connectors. Connectors that are not used must
have a terminating resistor fitted.
The antennas R1A1 and R2A1 must be always be connected as soon as the associated
WLAN Interface is turned on. if no antenna is connected, the relevant interface must also be
disabled for RX and TX. Otherwise, there may be transmission disruptions.
You will find information on the configuration of the antennas in the following documents:
• SCALANCE W7x8
SCALANCE W700 configuration manual, section "Configuring antennas"
• SCALANCE W7x8C
SCALANCE WLC711 User Guide, section "Configuring wireless AP radio properties"
34
SCALANCE W788-x / W748-1
Operating Instructions, 06/2016, A5E03678333-10