N. V. Nederlandsche Apparatenfabriek NEDAP SENSITEPL Manual Do Utilizador
SENSIT SYSTEM | MANUAL
Frequently Asked Questions
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15.7 RELAY NODES
What is a Relay Node?
A Relay node consists of a SENSIT configured in an active role and a Relay Node mounting
set. The mounting set allows for easy mounting of the Relay node onto a lamppost. The
Relay node is a normal SENSIT but configured differently, a Relay Node has a more active
role in the wireless network compared to a SENSIT. That is why we call a Relay Node an
active node and a SENSIT a passive node. The continuous transmitting and receiving of an
active node consumes more power than a passive node who is only listening to a few active
nodes to stay synchronized and to receive incoming messages. The battery life of the Relay
Node will be about 2 to 3 years. The advantage is that a Relay Node is still completely
wireless and does not require any power or communication cabling.
What is a Relay Node 2G?
A Relay node 2G is a dedicated product for relaying message from the SENSIT sensors to
the Data Collector. The Relay Node 2G has an active role and in the Wireless SENSIT
Network. The battery lifetime of the Relay Node 2G is similar as the lifetime of the SENSIT
sensors. The Relay Node 2G is wireless and does not require any power or communication
cabling.
Why are Relay Nodes required?
Relay nodes are required to ensure a faster communication path to the Data Collectors, a
more robust network and less energy consumption. Relay Nodes are required to ensure that
SENSIT sensors positioned in the area can communicate directly via the Relay Node back to
the central system. If each SENSIT sensor would need to communicate via the other
SENSIT sensors installed in the floor, more communication ‘hops’ are needed. This will
cause a slower communicating network, with a higher chance of missing a message and
higher energy consumption.
How much Relay Nodes do I need to install?
The number of Relay Nodes depends on various parameters: number of SENSIT sensors,
distances and obstructions. A minimum of 1 Relay Nodes and 1 Data Collector is required
per installation to create a 2 path communication possibility for each SENSIT sensor. Nedap
can provide you with more detailed information on the amount of Relay Nodes per
installation for your site.
Has Nedap a tool to determine the number of needed Relay Nodes?
There is a tool available to make a better estimation of needed equipment, see chapter 4.
Please ask your Nedap account manager for more information.
What is the communication distance between Relay Nodes and other components of
the system?
Below the maximum recommended distances between the different nodes.
Data Collector
A Relay node consists of a SENSIT configured in an active role and a Relay Node mounting
set. The mounting set allows for easy mounting of the Relay node onto a lamppost. The
Relay node is a normal SENSIT but configured differently, a Relay Node has a more active
role in the wireless network compared to a SENSIT. That is why we call a Relay Node an
active node and a SENSIT a passive node. The continuous transmitting and receiving of an
active node consumes more power than a passive node who is only listening to a few active
nodes to stay synchronized and to receive incoming messages. The battery life of the Relay
Node will be about 2 to 3 years. The advantage is that a Relay Node is still completely
wireless and does not require any power or communication cabling.
What is a Relay Node 2G?
A Relay node 2G is a dedicated product for relaying message from the SENSIT sensors to
the Data Collector. The Relay Node 2G has an active role and in the Wireless SENSIT
Network. The battery lifetime of the Relay Node 2G is similar as the lifetime of the SENSIT
sensors. The Relay Node 2G is wireless and does not require any power or communication
cabling.
Why are Relay Nodes required?
Relay nodes are required to ensure a faster communication path to the Data Collectors, a
more robust network and less energy consumption. Relay Nodes are required to ensure that
SENSIT sensors positioned in the area can communicate directly via the Relay Node back to
the central system. If each SENSIT sensor would need to communicate via the other
SENSIT sensors installed in the floor, more communication ‘hops’ are needed. This will
cause a slower communicating network, with a higher chance of missing a message and
higher energy consumption.
How much Relay Nodes do I need to install?
The number of Relay Nodes depends on various parameters: number of SENSIT sensors,
distances and obstructions. A minimum of 1 Relay Nodes and 1 Data Collector is required
per installation to create a 2 path communication possibility for each SENSIT sensor. Nedap
can provide you with more detailed information on the amount of Relay Nodes per
installation for your site.
Has Nedap a tool to determine the number of needed Relay Nodes?
There is a tool available to make a better estimation of needed equipment, see chapter 4.
Please ask your Nedap account manager for more information.
What is the communication distance between Relay Nodes and other components of
the system?
Below the maximum recommended distances between the different nodes.
Data Collector
Relay Node
25 m
(82 ft)
Relay Node
Relay Node
50 m
(164 ft)
SENSIT
Relay Node
25 m
(82 ft)
Data Collector
SENSIT
25 m
(82 ft)
Data Collector
Relay Node 2G omni-directional
35 m
(135 ft)
Data Collector
Relay Node 2G directional
50 m
(164 ft)
Data Collector GPRS Relay Node 2G
10 m
(33 ft)
Relay Node 2G
Relay Node 2G
100m
(328 ft)
SENSIT
Relay Node 2G omni-directional
35 m
(135 ft)
SENSIT
Relay Node 2G directional
50 m
(164 ft)
Note
Use of Relay nodes is
mandatory to ensure a fast
communicating, more stable
and a less energy consuming
SENSIT network.
Use of Relay nodes is
mandatory to ensure a fast
communicating, more stable
and a less energy consuming
SENSIT network.