|
 TRANSMITTER |
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Specification |
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As
standard, the Landmark Transmitter is configured as follows.
( Note that this is only the
minimum specification - greater I/O capacity can be achieved through the
expansion options detailed further below. )
| - 1
analogue input |
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Accepts 4-20mA or
0-5V signals |
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| - 8 volt
free digital inputs |
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On board Opto
isolation as standard. |
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| - 2 pulse
input signals |
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2 x 32-bit counters . |
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| - 1/2 UHF
watt MPT1329 radio |
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Allows transmission
distances of up to 10km licence-free. |
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| -
Integral 110/240V power supply |
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Operation |
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The Transmitter will
automatically wake up, sample and transmit its data either at a pre-defined
interval or on change of state of a digital input.
Once
the data is transmitted, the unit will resume 'sleep mode' ensuring minimum
power consumption. |
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Expansion |
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The configuration shown
above is the minimum for a standard Landmark Transmitter.
Expansion modules may be added to allow a single transmitter to
accommodate up to 64 digital and 8 analogue inputs.
Details of all expansion options can be found in our
on-line catalogue. |
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Transmission |
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Data transmission is
achieved using the integral UHF radio module, transmitting typically at 1/2 Watt
on MPT1329 frequencies - a licence-free operating band for UK telemetry -
together with a unity gain 'Dipole' antenna .
Antennae
with gain may be used to compensate for power lost in long antenna cable runs,
and high gain antennae may be used at the receiver to optimise performance as
detailed in the antennae section of this
website.. |
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Technical
Data |
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Further information may be
gained by downloading the Landmark Transmitter
Manual or by accessing the Troubleshooting
section of this website. |