Technical data

Rockwell Automation Publication 1769-TD005I-EN-P - August 2014 35
CompactLogix Controllers Specifications
1769-L23x Local I/O Performance
The requested packet interval (RPI) defines the frequency at which the controller sends and receives all I/O data on the
backplane. The default RPI is 5 ms. The combination of embedded I/O in the packaged controllers determines the fastest
RPI you can configure.
You can always select an RPI that is slower than listed previously. These considerations show how fast modules can be
scanned—not how fast an application can use the data. The RPI is asynchronous to the program scan. Other factors, such
as program execution duration, affect I/O throughput.
Controller Guideline
1769-L23E-QB1B 1…4 modules can be scanned in 1.0 ms
1769-L23E-QBFC1B
1769-L23-QBFC1B
• 1…4 modules can be scanned in 1.5 ms
• 5…6 modules can be scanned in 2.0 ms
Table 22 - Technical Specifications - 1769 Packaged CompactLogix Controllers
Attribute 1769-L23E-QB1B 1769-L23E-QBFC1B 1769-L23-QBFC1B
User memory 512 KB 512 KB 512 KB
Optional nonvolatile memory None
Number of expansion I/O modules, max 3 (limited by current draw of module) 2 (limited by current draw of module) 2 (limited by current draw of module)
Replacement battery 1769-BA
Current draw @ 5V DC 1000 mA 450 mA 800 mA
Current draw @ 24V DC 700 mA 500 mA 600 mA
Power dissipation 7.01 W 13.58 W 10.73 W
Isolation voltage 30V (continuous), basic insulation type
Type tested at 710V DC for 60 s; RS-232 to system backplane, Ethernet to system backplane, and
RS232 to Ethernet
30V (continuous), basic insulation type
Type tested at 710V DC for 60 s; RS232
channel 0 to system backplane, no isolation
between RS232 channel 1 and system
Serial communication ports CH0 - RS-232
DF1, DH-485, ASCII
Fully isolated
38.4 Kbps max
CH0 - RS-232
DF1, DH-485, ASCII
Fully isolated
38.4 Kbps max
CH1 - RS-232
DF1, DH-485
Nonisolated
38.4 Kbps max
Serial cables 1756-CP3 or 1747-CP3, right angle connector to controller, straight to serial port, 3 m (9.84 ft)
Weight, approx 0.91 kg (2 lb) 1.22 kg (2.7 lb) 1.22 kg (2.7 lb)
Slot width 1
Module location DIN rail or panel mount
Mounting screw torque 1.1…1.8 N
m (10…16 lbin) - use M4 or #8 screws
Wire category
(1)
(1) Use this conductor category information for planning conductor routing. See the Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.
2 - on signal ports
2 - on power ports
2 - on communication ports
Wire type, Ethernet RJ-45 connector according to IEC 60603-7, 2 or 4 pair Category 5e minimum cable according to
TIA 568-B.1 or Category 5 cable according to ISO/IEC 24702
—
Wire size, DC power 0.25…2.5 mm
2
(22…14 AWG) solid or stranded copper wire rated at 75 °C (167 °F) or greater, 1.2 mm (3/64 in.) insulation max
Wire size, discrete I/O connections 0.5…0.8 mm
2
(20…18 AWG) solid or stranded copper wire rated at 75 °C (167 °F) or greater, 1.2 mm (3/64 in.) insulation max
Wire size, embedded analog and high-speed counter
connections
0.5…0.8 mm
2
(20…18 AWG) solid or stranded shielded copper wire rated at 75 °C (167 °F) or greater, 1.2 mm (3/64 in.) insulation max
North American temperature code T3C
Enclosure type rating None (open-style)