XB24-BUIT-004 Digi International/Maxstream, XB24-BUIT-004 Datasheet - Page 20

• Manufacturer Part Number: XB24-BUIT-004
• Description: MODULE 802.15.4 SER 2 U.FL CONN
• Manufacturer: Digi International/Maxstream
• Series: XBee™r

Specifications of XB24-BUIT-004

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, Industrial Control, ZigBee™
• Power - Output: 2 mW (3 dBm)
• Sensitivity: -96dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 38mA
• Current - Transmitting: 35mA
• Data Interface: PCB, Through Hole
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

XBee ZNet 2.5/XBee‐PRO ZNet 2.5 ZigBee OEM RF Modules v1.x4x
valid Z igbee netw ork, that is allow ing joins, the router or end device sends an association request to that device to attem pt to join
A router or end device sends a beacon request to discover nearby Z igbee netw orks . If a device is found that is operating on a
3.3.1. Allowing Joining
R outer
Routers and end devices can be configured to join any ZigBee PAN, or to only join a PAN with a
certain PAN ID. However, they must always find a coordinator or router that is allowing joins.
Figure 3‐04. Joining a PAN
Once a joining device (router or end device) discovers a device operating on a valid ZigBee
network that is allowing joining, it attempts to join the PAN by sending an association request to
that device.
The coordinator and all routers can allow new routers and end devices to join to them. Whether or
not a particular coordinator or router will allow a new device to join depends upon two things:
Permit-Joining Attribute
The coordinator and all routers have a permit-joining attribute. This attribute on a coordinator
and any joined routers can be configured to always allow joins, allow joins for a short time, or to
not allow any more joins. In order for a new device to join the network, this attribute must be set
on a nearby device such that joins are enabled.
End Device Children
Since end devices rely on their parent router or coordinator to buffer incoming RF packets, the
coordinator and each router can support a finite number of end device children. Once that number
of end devices has joined a particular router or coordinator, the device can no longer allow end
devices to join to it.
© 2008 Digi International, Inc.
• its permit-joining attribute (if joins are allowed)
• the number of end device children it already has
A ssociation R equest
A ssociation R esponse
B eacon R equest
B eacon *
R outer attaem pting to join
the netw ork
B eacon R equest
B eacon R equest
B eacon *
* E ach beacon contains
the follow ing attributes:
A llow join = true/false
P A N ID = xx
C oordinator
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