Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 17
Install the CompactLogix 5370 L1 Controller Chapter 1
• A second, fused external power supply must be used to provide power to
other components for only series A L16ER, L18ER, and L18ERM
controllers (see Appendix
C).
• Power for other components can be provided from the external power
supply that is used to provide power to the system for only series B L16ER,
L18ER, L18ERM Controllers, and series A L19ER Controllers.
• The controller has 16 embedded digital input points and 16 embedded
digital output points. You wire the input and output points via a removable
connector.
• The controller supports the use of a limited number of
1734 POINT I/O
 modules on the POINTBus backplane as local
expansion modules.
The following table lists local expansion module support by controller
catalog number.
See Chapter 7
for further information about the I/O modules.
You must use a dedicated external Class 2/SELV-approved power
supply to provide power to the system, according to needs of the
application, and within the operating voltage range of the controller
for only series A L16ER, L18ER, and L18ERM controllers.
The external power supply that provides power to the embedded
power supply of the controller cannot be used to provide power to any
other components or devices in the application for only series A L16ER,
L18ER, and L18ERM controllers.
You must use the latest series and firmware revision for all 1734
POINT I/Oâ„¢ modules in the local expansion slots to make sure that your
application operates as expected. Use of an older firmware revision
renders the entire 1734 bus inoperable.
Table 1 - Local Expansion Module Support for CompactLogix 5370 L1 Controllers
Cat. No. 1734 POINT I/O Modules Supported, max
1769-L16ER-BB1B 6
1769-L18ER-BB1B 8
1769-L18ERM-BB1B
1769-L19ER-BB1B
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