10.2.3. Delete
To delete the Datalogger data from the converter, select the LOG
Clear Datalogger memory menu on the
DD
Converter Information tab (Figure 31). A window will be displayed confirming the operation (Figure 34).
Select Yes and all logs will be deleted from the converter’s memory.
Figure 34
Low
Interference potential
Barrier types
Synthetic materials
Medium
Water
High
Plaster
Medium
Brick
Medium
Marble
High
Armored glass
High
Concrete
Metal
Wood
Glass
Low
Low
Very high
11. USAGE RECOMMENDATIONS
When the
uses wireless communication, some recommendations must ve taken
TCP-485 Wi-Fi Log
into account when installing it, in order to guarantee its best performance. Here are some of them.
1) Check that the Wi-Fi devices are compliant with the IEEE 802.11 b/g/n standard;
2) Install the Wi-Fi router preferably at the highest point of the room, so that your signal is better broadcast,
with a minimum or interference from obstacles;
3) Observe in the router’s technical specifications how many simultaneous connections it supports;
4) Avoid sources of interference, such as:
- Microwave ovens;
- Direct Satellite Services (DSS);
- Power sources (power transmission lines, electric railway tracks and power stations);
- 2.4 GHz or 5 GHz phones;
- Wireless radio frequency video;
- Wireless speakers;
- LCD screens and external monitors;
- Unprotected cables;
- Other wireless devices.
5) At the installation site, avoid physical barriers that attenuate the signal, below we have a table with the
level of attenuation of each material:
12.1
FOR A ROBUST ELECTRICAL INSTALLATION, TRY TO FOLLOW THE RECOMMENDATIONS
BELOW:
- Use 2-way cable, with a minimum of 24AWG;
- Use preferably shielded cables in order to protect the communication line from external interference;
- If necessary, please use a connection block;
- Use the connection blocks to make the connections to the controllers. In addition to facilitating the
connection, they have a protection purpose;
- Avoid connections greater than 2 meters (6.5 ft) between the connection block and the controller;
- Use a maximum number of
32 devices
connected to each Interface.
- Dimension networks with a maximum length of
1000m
(3200 ft)
between the Interface and the last
controller.
- Connect a 120 ohm terminating resistor between terminals
A
and
B
of the connection block at the end of
the line when using a cable length greater than
100m
(320 ft).
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12. CONNECTING CONTROLLERS, RS-485 SERIAL INTERFACE
AND COMPUTER
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POWER
STATUS
TX
RX
32 controllers
32 controllers
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CONVERTER
RS-485
POWER
STATUS
TX
RX
CONVERTER
RS-485
POWER
STATUS
TX
RX
Maximum cable distance = 1000m (3200 ft)
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CONVERTER
RS-485
POWER
STATUS
TX
RX
- Avoid creating long network branches.
12.3
NON-RECOMMENDED TOPOLOGIES
x
INCORRECT
CORRECT
12.2
RECOMMEND TOPOLOGIES:
- Use one of the following settings to create a well-defined path.
12.4 CONNECTION BLOCK FOR SERIAL COMMUNICATION
*Sold separately
It is used to connect more than one controller to the interface. Wire connections should be made as follows:
Terminal
A
of the controller connects to terminal
A
of the connection block, which in turn must be connected
to terminal
A
of the Interface. Repeat the procedure for terminals
B
and
with
being the cable mesh.
dd
dd
The
terminal of the connection block must be connected to the respective
terminals of each controller.
dd
dd
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Ceiling
POWER
STATUS
TX
RX
Maximum 2 meters
Ceiling
CONVERTER
RS-485
POWER
STATUS
TX
RX
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CONVERTER
RS-485
POWER
STATUS
TX
RX
POWER
STATUS
TX
RX
- Do not ground the controllers independently.
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INCORRECT
x
- Ground the cable mesh at only one point, preferably close to the interface.
12.5 IMPORTANT
According to NBR 5410 standard chapters:
1. Install surge protectors in the supply.
2. Sensor and serial communication cables can be together, but not in the same conduit through which
electrical power and load activation pass.
Power grid
Distance > 4in
Sitrad Network
CORRECT
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