Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
193
Use I/O Modules with CompactLogix 5370 L2 Controllers
Chapter 8
Embedded High-speed Counters
The 1769-L24ER-QBFC1B and 1769-L27ERM-QBFC1B controllers support
four embedded high-speed counters. Each counter is a differential input.
Therefore, two input terminals are required for one counter. For example, the
A0+ and A0- terminals are required for counter A0.
The L2 embedded high-speed counters operate like the 1769-HSC module. See
for further information.
Each counter uses differential inputs that are compatible with standard
differential-line driver output devices and single-ended devices.
shows
the embedded high-speed counter input points.
Figure 34 - 1769-L27ERM-QBFC1B Controller Embedded High-speed Counter Wiring
Termination Points
IMPORTANT
The embedded high-speed counters are available on only the 1769-L24ER-
QBFC1B and 1769-L27ERM-QBFC1B controllers.
IMPORTANT
shows the embedded high-speed counters on the 1769-L27ER-QB1B
controller. The embedded high-speed counter points on the 1769-L24ER-
QBFC1B and 1769-L27ERM-QBFC1B controllers are organized and wired the
same.
