| Applicable PT | Number of I/O points | Power supply voltage | Model | 
|---|---|---|---|
| NT31/NT31C Series NT631 Series | 64 words (8 words are used for the PT status control area and PT status notify area.) | 24 VDC | NT-DRT21 | 
Programmable Terminal DeviceNet Interface Unit
             
        
last update: August 7, 2013
| Applicable PT | Number of I/O points | Power supply voltage | Model | 
|---|---|---|---|
| NT31/NT31C Series NT631 Series | 64 words (8 words are used for the PT status control area and PT status notify area.) | 24 VDC | NT-DRT21 | 
last update: August 7, 2013