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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
1.2 SPECIFICATIONS
The table below shows the specifications of the wireless network system.
[Table 1.1] Specifications of wireless network system
ITEM
SPECIFICATIONS
Wireless system
Baud rate
Max. 100 kbps
Effective rate
10 kbps
Number of child devices
Max. 100 per parent device
Number of hops
Max. 16
Number of child nodes
25 or 15
The table below shows the specifications of the wireless communication module of the wireless devices.
[Table 1.2] Specifications of wireless communication module
ITEM
SPECIFICATIONS
Wireless interface
Agency certification
KCC
Frequency
920 MHz band (920.5 – 923.5 MHz)
Bandwidth
400 kHz
Max. transmission power
12.5 mW
Baud rate
Max. 100 kbps
Max. packet size
2048 bytes
Max. transmission distance
Approx. 1 km (line of sight)
Note 1: The distance may vary depending on the installation environment.
Note 2: Use of a coaxial cable for antenna extension shortens the distance due
to cable loss.
Modulation
GFSK
Receive sensitivity
-90 dBm or less (PER = 10%)
1.3 PRODUCT LINEUP
■
PARENT DEVICE
[Table 1.3] Parent device
MODEL
FEATURES
WL40EW2KR
Works as a gateway, converting between Modbus-RTU and Modbus/TCP (Ethernet) protocols.
Selectable between sleeve and rooftop antennas
■
CHILD DEVICE
[Table 1.4] Child device
MODEL
FEATURES
WL40MW1KR
Wireless gateway
Selectable between sleeve and rooftop antennas
