1747-L551

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1747-L551

Type

SLC 500 processor

Application

PLC controller

Used with

SLC 500 1746 chassis

Processor

SLC 5/05

Memory (words)

16 K

I/O capacity, max

4096 discrete inputs/4096 discrete outputs

Local system, max

3 chassis / 30 slots

Programming instructions

107

Typical scan time

0.9 ms/K (typical for a 1 K ladder logic program)

Bit execution (XIC)

0.37 µs

Programming software

RSLogix 500

Communication options

DH485; RS-232 (DF1 full-duplex, DF1 half-duplex master/slave, DF1 radio modem, DH-485 or ASCII); Ethernet TCP/IP; Data Highway Plus through a ControlLogix gateway; ControlNet through a 1747-KFC15; DeviceNet through a 1761-NET-DNI

Power supply loading at 5V dc

1.0 A

Power supply loading at 24V dc

0 mA

Program scan hold-up time after loss of power

20 ms...3 s (dependent on power supply loading)

Noise immunity

NEMA Standard ICS 2-230

Vibration

Displacement: 0.015 in., peak-to-peak at 5-57 Hz; Acceleration: 2.5 g at 57...2000 Hz

Shock, operating

30 g

Ambient temperature rating, operating

0...60 °C (32...140 °F)

Ambient temperature rating, storage

-40...85 °C (-40...185 °F)

Humidity

5 to 95% without condensation

Technical documents (1)

• Rockwell Automation publication 1747-IN009 (specifications)

Key features

• SLC 5/05 processor with 16 K words of memory
• Up to 4096 discrete inputs and 4096 discrete outputs
• Local system of up to 3 chassis and 30 slots
• 107 programming instructions, programmed with RSLogix 500
• Typical scan time 0.9 ms/K, XIC execution 0.37 µs

About the Allen-Bradley 1747-L551

The Allen-Bradley 1747-L551 is the SLC 5/05 16K Controller, and Rockwell Automation lists its lifecycle status as Discontinued. According to Rockwell publication 1747-IN009, it has 16 K words of memory, 107 programming instructions and a maximum I/O capacity of 4096 discrete inputs and 4096 discrete outputs. The publication gives a typical scan time of 0.9 ms/K for a 1 K ladder logic program and a bit execution time (XIC) of 0.37 µs. It loads the power supply with 1.0 A at 5V dc and 0 mA at 24V dc.

What is the 1747-L551 used for?

In an SLC 500 system the processor holds and runs the user program, written in RSLogix 500, for a local system of up to 3 chassis and 30 slots. It communicates over DH485, RS-232 and Ethernet TCP/IP, with Data Highway Plus, ControlNet and DeviceNet reached through the gateways and interfaces Rockwell lists. Publication 1747-IN009 rates it for 0...60 °C and 5 to 95% humidity without condensation.

Lifecycle and successor

Discontinued.

Before you order

What to photograph or confirm so the right unit is quoted.

Check that the module label shows catalog number 1747-L551, and note the series letter and firmware revision printed on it. Send us a photo of the label if you need help confirming the part.