ICS TRIPLEX Analog Input Module - 40 Channel (T8431)

The TMR 24V dc analog input module, shown in Figure 6-10, interfaces to 

40 sourcing field input devices. The module acts as a current sink for the 

devices.  

The module can detect open and shorted field cables using the built-in line

monitoring feature. Line monitoring functions are independently configured 

for each input channel. 

The module provides on-board sequence of events (SOE) reporting with a 

resolution of 1ms. A change of state triggers an SOE entry. States are 

determined by voltage thresholds that can be configured on a per channel 

basis.  

The input status LED mode is dependent upon the voltage level of the field 

I/O signal. Each field input voltage is measured and compared to six 

threshold levels (four configurable and two fixed) which produce seven 

threshold bands, as described in Section 8. Each threshold band can be 

defined to have a particular indicator mode: off, solid or flashing green, or 

solid or flashing red.