LORD V-Link-200, Руководство пользователя

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V-Link
®
-200
User Manual
6.3 Sensor Power
Total sensor current draw of more than 150mA can cause permanent
damage to the node and should be avoided.
Sensors can be powered by the node or with an external power supply. The node sensor excitation
voltage is 4.096 V dc and can provide up to 150mA total on all channels. If a higher voltage or more
current is required for the sensor, an appropriately sized external power supply can be used. For
example, using the node battery for current intensive devices such as 4 to 20mA sensors will drain the
battery quickly. For these applications, an external source is recommended for the sensor or the node.
Drain on the battery can also be limited by selecting low resource sampling modes and low duty
sampling rates, which automatically switch the node excitation voltage off after sampling. This feature
can also be utilized to turn switches on and off to further control resource use. See Using the Excitation
Output as a Switch on page 51
.
External battery holders and ruggedized outdoor housings that accommodate larger batteries are
available for the V-Link-200 and can be used to extend battery operating capacity and duration.
See
Node Accessories on page 88 .
6.4 Node Channels Designations
Channel Description Pin Nomenclature
1
differential channel 1 S1
2
differential channel 2 S2
3 differential channel 3 S3
4
differential channel 4 S4
5
single ended channel 1 Ain1
6 single ended channel 2 Ain2
7
single ended channel 3 Ain3
8
single ended channel 4 Ain4
Table 1 -
Channel Designations
40