User manual

Detailed descriptions of I/O modules | Analogue input module UR20-4AI-TC-DIAG
207Manual u-remote1432790000/03/02.2014
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
MUX
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 –
1
2
3
4
DC
DC
µC
µC
CJC
Intern
System-
bus
U
SYS
U
IN
U
OUT
UR20 4AI-TC-DIAG
A
D
BlockdiagramUR20-4AI-TC-DIAG