Overview of the analog system, General diagnostic features -4, Overview of the analog system -4 – Rockwell Automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I/O Combination Module User Manual
Page 14: General diagnostic features
Publication 1769-UM008A-EN-P - November 2001
1-4 Overview
General Diagnostic Features
The module contains diagnostic features that can help you identify the
source of problems that may occur during power-up or during normal
channel operation. These power-up and channel diagnostics are
explained in Chapter 5, Module Diagnostics and Troubleshooting.
Overview of the Analog
System
The module communicates to the controller through the bus interface.
The module also receives 5 and 24V dc power through the bus
interface.
You can install as many analog modules as your power supply can
support. However, the 1769-IF4XOF2 module has a power supply
distance rating of 8, which means that it may not be located more than
8 modules away from the system power supply. The illustration below
shows how power supply distance is determined.
1
1
1
2
3
4
3
2
2
3
4
Co
m
pact
I/
O
Co
mpact
I/O
Co
m
pac
t I/
O
Co
m
pac
t I/
O
En
d Cap
or
Ca
bl
e
MicroLogix 1500 Controller
with Integrated System
Power Supply
S
yst
em Power
Sup
pl
y
(e
.g
. 17
69-
PA
2)
Co
m
pac
t I/
O
Co
mpact
I/O
Co
mpact
I/O
End C
ap or
C
abl
e
Comp
act
Log
ix C
ont
ro
lle
r
or
I/O
Commu
nic
at
ion
A
dap
te
r
Com
pa
ct
I/
O
C
ompact
I/
O
C
ompact
I/
O
OR
Power Supply Distance
Power Supply Distance