Technical data

52 Rockwell Automation Publication 1769-TD005I-EN-P - August 2014
CompactLogix Controllers Specifications
1768-L4x Local I/O Performance
Configure an individual RPI for each local 1769 Compact I/O module. Use the default RPI numbers that the
programming software automatically assigns or select faster RPI values as fast as 1 ms I/O module update times do not
affect overall 1768 bus performance:
• Use faster RPI values for time critical I/O without impacting overall 1769 Compact I/O performance.
• Use Immediate Output (IOT) instructions for further reduction in I/O module update times.
Table 35 - Technical Specifications - 1768 CompactLogix Controllers
Attribute 1768-L43 1768-L43S 1768-L45 1768-L45S
User memory 2 MB 2 MB standard
0.5 MB safety
3 MB 3 MB standard
1 MB safety
Optional nonvolatile memory 1784-CF128
Number of 1768 modules, max 2 4
Number of 1768 communication modules, max 2
Number of 1768 motion modules, max 2 4
Number of 1769 I/O modules, max 16 30
Number of I/O banks, max 2 3
Replacement battery None needed
Backplane current draw @ 24V DC 1.3 A 1.4 A 2.0 A 2.1 A
1768 current draw @ 5V DC 2.8 A 5.6 A
1769 current draw @ 5V DC 2.0 A 2.0 A
Total 1768 and 1769 current draw @ 5V DC 4.8 A 7.6 A
Power dissipation 6.3 W 7.5 W 8.3 W 9.5 W
Power consumption 31.3 W 33.6 W 48.0 W 50.4 W
Isolation voltage 30V (continuous), functional insulation type
Type tested at 500V AC for 60 s; RS-232 to system
Communication ports RS-232
Fully isolated, 38.4 Kbps max
Serial cables 1756-CP3 or 1747-CP3, right angle connector to controller, straight to serial port, 3 m
Weight, approx 0.34 kg (11.99 oz) 0.45 kg (15.9 oz) 0.34 kg (11.99 oz) 0.45 kg (15.9 oz)
Dimensions (HxWxD) 131.1 x 56.4 x 121.1 mm
(5.18 x 2.22 x 4.81 in.)
131.6 x 89.6 x 122.1 mm
(5.18 x 3.53 x 4.81 in.)
131.1 x 56.4 x 121.1 mm
(5.18 x 2.22 x 4.81 in.)
131.6 x 89.6 x 122.1 mm
(5.18 x 3.53 x 4.81 in.)
Slot width 1 1.5 1 1.5
Module location DIN rail or panel mount
Panel-mounting screw torque 1.16 N
m (10 lbin) - use M4 or #8 screws
Power supply distance rating 4 modules
Power supply 1768-PA3, 1768-PB3
Wire category
(1)
(1) Use this conductor category information for planning conductor routing as described in the system level installation manual. See the Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1.
2 - on communication ports
IEC temperature code N/A T4 N/A T4
North American temperature code T4
Enclosure type rating None (open-style)