User manual

6 Detailed descriptions of I/O modules | Analogue input module UR20-4AI-TC-DIAG
296 1432790000/08/12.2015Manual u-remote
4AI-TC
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
cold-junction compensation error
2.1
Red: Signal at input 1 outside the permissible range, line break or
cold-junction compensation error
3.1
Red: Signal at input 2 outside the permissible range, line break or
cold-junction compensation error
4.1
Red: Signal at input 3 outside the permissible range, line break or
cold-junction compensation error
LEDindicatorsUR20-4AI-TC-DIAG,errormessagesseeChapter13
DC
DC
MUX
System
bus
U
SYS
U
IN
U
OUT
µC µC
A
D
UR20 4AI-TC-DIAG
1
2
3
4
CJC
Internal
CJC 1 +
TC 1 +
TC 1 –
CJC 1 –
CJC 0 +
TC 0 +
TC 0 –
CJC 0 –
CJC 2+
TC 2 +
TC 2 –
CJC 2 –
CJC 3 +
TC 3 +
TC 3 –
CJC 3 –
Block diagram UR20-4AI-TC-DIAG