6
1769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
CompactLogix Controller Description
System Planning
Consider the following when planning your CompactLogix system:
·
The CompactLogix controller is always the left-most module in the system.
·
The controller must be located within four modules of the system power
supply. Some I/O module’s may be located up to 8 modules away from the
power supply. See the documentation for your 1769 I/O modules for details.
·
The 1769-L20 controller supports up to 8 I/O modules in a maximum of 2
I/O banks (1 expansion cable allowed).
·
The 1769-L30 controller supports up to 16 I/O modules in a maximum of 3
I/O banks (2 expansion cables allowed).
·
Each I/O bank requires its own power supply.
·
Only one controller can be used in a CompactLogix system.
·
A 1769-ECR (right end cap) or 1769-ECL (left end cap) is required to
terminate the end of the communication bus.
1
DIN rail latch
8
Channel 0 RS-232 Port
2
panel mounting tab
9
Channel 0 default communication push button
3
tongue and groove slots
10
Channel 1 RS-232 Port
4
stationary bus connector
11
Channel 1 RS-232 Port Status LED
5
status LEDs
12
battery door
6
key switch
13
battery door label
7
Channel 0 RS-232 Port Status LED
14
battery
(1)
(1)
See Connect the Battery on page 8 for the actual position of the battery.
15
battery connector
1
1
2
2
3
3
4
5
6
7
8
7
8
9
9
10
14
15
12
13
11
1769-L20 controller
1769-L30 controller
