Scope Of Application; Range In Open Area - WAGO I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
®
750-644 Bluetooth RF-Transceiver
7.3.1

Scope of Application

Please note the scope of application!
• When used in the scope of application of the FCC, the magnetic base antenna
from WAGO may be used exclusively (item No.: 758-912).
• When used in the scope of application of the R&TTE, any antenna with antenna
gain of max. 0 dBi may be used.
7.3.2

Range in Open Area

The maximum distance that can be overcome by a radio link is defined by the
following factors:
1 Input Sensitivity
This denotes the capability of the device hardware to detect the radio signal
transmitted by the remote device. The greater the sensitivity, the more
weaker signals that can be received.
 This is a permanent device property.
2 Transmitting Power
This denotes the signal strength which the device hardware outputs/can
output for transmitting.
The maximum transmitting power for the 750-644 I/O module can be set
as a parameter. Transmitting power should be set to the highest level for the
maximum range.
3 Antenna Gain
This factor denotes the focusing or bundling properties of the antenna. An
antenna with high antenna gain exhibits a strong alignment characteristic,
i.e. depending on the antenna alignment, only highly amplified or extremely
attenuated signals can be received.
That means that the reception properties can be greatly influenced by
correct alignment. The best results are achieved when the antennas are
aligned in parallel and on the same level (see also section "Device
Description" > ... > "Antenna").
Antenna gain of the antenna 758-921
The magnetic base antenna from WAGO (item No. 758-912) itself exhibits
antenna gain of 2 dBi. Due to its cable length, the effective antenna gain is only 0
dBi, thus also meeting the scope of application of the R&TTE.
4 Ambient Conditions
This factor deals with the physical environment/area around the wireless
system. To achieve the maximum range, a line-of-sight link should exist
between the antennas and there should be no objects present along the direct
Manual
Version 2.0.0, valid from FW/HW Version 03/03
Mounting 71