TCG140_R1.1 – May 2018
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The maximum cable length for a digital input should be up to 30 meters.
5.2.5.
Analog inputs connection
Attention! Analog inputs are NOT galvanic isolated.
Analog inputs of TCG140 can be used for monitoring of DC voltage up to 10VDC. They can be
connected directly to sensors and transmitters with such analog output.
The sample rate of analog inputs is
The “Multiplier”, “Offset” and “Dimension” for every analog input gives a possibility to monitor
sensors with analog outputs and see directly the measured parameter.
It is possible to monitor voltages bigger than 10VDC with adding an external resistor in series. For
every 1 mega-ohm, the voltage will be extended with 5.893V. The external resistor should be
with 1% or better accuracy.
To analog inputs 3 and 4 internally can be assigned 410-ohm resistor in parallel of the input. In
this case, the input can accept directly 0-20mA current loop sensors and transmitters.
The switching of the resistor is done by the user interface.
The following picture illustrates how 0-10V analog sensor is connected to the analog input 1 and
0-20mA current loop transmitter is connected to analog input 3. The analog input 3 is in current
mode.
Summary of Contents for TCG140
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