Filter
Top Products
Chapter 7 Usage of Various Functions
7-66
8) Burn-out detection function
The RTD input module has the function of burn-out detection on the Pt100, JPt100 or cable.
•As shown below, if disconnection occurs in the RTD or cable then a voltage outside the measurable range voltage is
inputted by the internal burn-out detection circuit and burn-out detection error code is generated.
•The RTD input module can detect disconnection for each channel. But, burn-out detection is possible only in the
channels enabled.
•If disconnection is detected in two or more wires, first, disconnection error code is generated by ‘b’ and then
disconnection error code is generated by ‘A’ or ‘b’ sequentially. If disconnection is detected simultaneously in ‘A’ and
‘B’, only disconnection error code is generated by ‘b’.
Connection
Method
Connection Example Remark
2-wire
type
3-wire
type
4-wire
type
No wiring
- In 4-wire type, only all wires marked '2'
connected to the terminal block A are all
detected as disconnection then the A
disconnection error can be detected.
*1 : Pt
*2: Shield wire
burn-out detection area
burn-out detectionarea
burn-out detection area