iSMA-B-FCU /FCU Hardware
Version 1.1
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3
ISMA-B-FCU device inputs
ISMA-B-FCU device has two types of inputs: 4 Digital Inputs – for Boolean values, and 4 Special
Inputs – for resistance and voltage measurement.
3.1 Special Inputs
ISMA-B-FCU device has 4 built-in special inputs which can work in the following modes:
•
Digital Input – dry contact,
•
Analog Input - 0-10 V DC,
•
Resistance Input- 0 – 1000
kΩ (1
MΩ),
•
Temperature Input - working with NTC sensors.
3.1.1 Special Inputs working as digital input
In this mode, Special Input works as a digital input dry contact and reactive Boolean value, false
for open circuit and true for close circuit. Circuit status is measured with
1 mA current.
Figure 12 Connection of Special Inputs Dry Contact
