User manual

6 Detailed descriptions of I/O modules | Analogue input module UR20-4AI-RTD-DIAG
288 1432790000/08/12.2015Manual u-remote
4AI-RTD
Module status LED
Green: Communication over the system bus
Red: Collective error diagnostic
1.1
Red: Signal at input 0 outside the permissible range, line break or
short-circuit
2.1
Red: Signal at input 1 outside the permissible range, line break or
short-circuit
3.1
Red: Signal at input 2 outside the permissible range, line break or
short-circuit
4.1
Red: Signal at input 3 outside the permissible range, line break or
short-circuit
LEDindicatorsUR20-4AI-RTD-DIAG,errormessagesseeChapter13
DC
DC
MUX
System
bus
U
SYS
U
IN
U
OUT
µC µC
A
D
UR20 4AI-RTD-DIAG
RTD 1 +
Sense 1 +
Sense 1 –
RTD 1 –
RTD 0 +
Sense 0 +
Sense 0 –
RTD 0 –
RTD 2 +
Sense 2 +
Sense 2 –
RTD 2 –
RTD 3 +
Sense 3 +
Sense 3 –
RTD 3 –
1
2
3
4
Block diagram UR20-4AI-RTD-DIAG