ED - Elettronica Dedicata(Rotary temp transmitter - wireless )
TS300
Rotating
temperature transmitter
Description
The TS300
transmitter can read up to three temperatures from a moving part and transmit
them to a standing part.
The
revolving part has to be mounted on the motor shaft and electrically connected
to the Pt100 sensors. It reads, convert into digital word and transmit the
temperatures to the standing part by means of an infrared light emitter.
These coded
light pulses are received by a photosensor and converted to a normalized analog
voltages ( 10mV/°C ).
On the rear
cover, two LED lamps monitor the transmitter status (in the following picture
they are marked ON and CK
).
A green
lamp indicates the
power status (on/off).
A
red lamp indicates that light pulses are received and
decoded .
Thus
the blinking red indicates a good working status.
In case
of fault, the red lamp switches off.
One of the
main features of TS300 is self
calibration.
There is no
more need to keep the rotating part coupled to a unique standing part in order to maintain the calibration or
to adjust the calibration point by potentiometers.
Now, at the
power-on, the rotating part send first its own calibration data and the
standing part adapt itself by computing
the proper range coefficients . This time on, the two parts are right coupled
together and there is no further need of manual calibration.
pitcure show the TS300/1 – 1 channnel
transmitter
The
reference data are sent periodically in
order to check the calibration status.
If any
deviation is detected, the standing part correct itself .
This way
any drift due to ambient temperature or components aging can be automatically
fixed.
Range 0- 300 °C.
Output: 10 mV/°C (e.g. 2V @ 200 °C ) (Option: 4-20mA)
Accuracy: 0.3 °C
Resolution:
0.5 °C
Max.
speed: mechanical
limited by the motor shaft (10.000rpm)
Ambient
temperature: 80°C
max for moving part. 70°C for standing part.
Inputs :Pt 100 sensors , two wires.
In case of
short circuit or break of input sensor,
or if no signal pulses are received from the moving part, the output set to the
full scale. This prevent the heating action of temp. controller.
TROUBLESHOOTING:
NOTE: The Red LED blinking
frequency is not always the same: this is due to the self-calibration
action and it is normal.
TS300 Electrical Connections
On the
TS300 rear cover a 6 poles connector is used:
pin 1,2
: 24 V ac (Can be use: 17-27Vac or
22-35Vdc; normal 0,5A , max 2A )
pin 3:
positive signal of Channel A
pin 4:
positive signal of Channel B
pin 5:
positive signal of Channel C
pin 6:
negative Common to all channels
On the
moving part, RTD connection follow the following color coding:
Black
wire: Common to the thtree RTD
Pink
wire: RTD on channel A
Red
wire: RTD on channel B
White
wire: RTD on channel C
In case
of a godet with only one channel it is
advisable to connect all the three wires (pink,red,white) together to the same
RTD terminal and do not leave them floating.
