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Allen-Bradley ControlLogix 5570 1756-L74 16 MB USB Controller

Allen-Bradley ControlLogix 5570 1756-L74 16 MB USB Controller

Allen-Bradley ControlLogix 5570 16 MB USB Controller

Complete Model

1756-L74

Official Product Description

ControlLogix 5570 controller with 16 MB user memory, 0.98 MB I/O memory, USB 2.0 local programming and preinstalled Secure Digital storage.

CORE FEATURE: 16 MB ControlLogix 5570 controller with USB programming and Secure Digital nonvolatile storage.

LEAD TIME: In stock

WARRANTY: 1 year

Email Inquiry [email protected]

WhatsApp +86 18159889985

Appurtenance:

allen bradley controllogix 5570 1756 l74 16mb usb controller-1

Overview
Technical Data
Inquiry
Applications & Features
Communications
Installation
Environment
FAQ
Recommend Models
Recommended Products

Product Overview

1756-L74 is an Allen-Bradley ControlLogix 5570 controller with 16 MB of user memory and 0.98 MB of I/O memory.

Rockwell Automation specifies a USB 2.0 full-speed local programming port, a preinstalled 1 GB 1784-SD1 Secure Digital card and a removable 1756-ESMCAP capacitor energy storage module.

The controller occupies one slot in a compatible 1756 ControlLogix chassis and requires separate chassis communication modules for industrial networks.

Technical Data

Complete model	1756-L74
Brand	Allen-Bradley / Rockwell Automation
Product family	ControlLogix 5570
Product type	Chassis-based programmable automation controller
User memory	16 MB
I/O memory	0.98 MB
Nonvolatile memory	1 GB 1784-SD1 Secure Digital card ships preinstalled; larger compatible cards may be available
Local programming port	USB 2.0, full speed at 12 Mbps; temporary local programming only
Embedded network port	None; use separate ControlLogix communication modules
Digital I/O maximum	128,000
Analog I/O maximum	4,000
Energy storage module	1756-ESMCAP removable capacitor module ships installed; 1756-ESMNRM is a supported security option
Current draw	5 mA at 1.2 V DC and 800 mA at 5.1 V DC
Power dissipation	2.5 W
Thermal dissipation	8.5 BTU per hour
Isolation voltage	30 V continuous, basic insulation, USB port to system
Dimensions	Not explicitly stated for 1756-L74 in Rockwell Automation publication 1756-TD001W-EN-P
Weight	Approximately 0.25 kg (0.55 lb)
Slot width	One ControlLogix chassis slot
Enclosure type	None, open-style equipment
Operating temperature	0 to +60 degrees C
Storage temperature	-40 to +85 degrees C
Relative humidity	5 to 95 percent, noncondensing
Vibration	2 g at 10 to 500 Hz
Shock	30 g operating and 50 g nonoperating
Certifications	CE, ATEX, IECEx, Australian RCM, Korean KC, UL and other certifications as marked on the product
Lifecycle	Active Mature on the Rockwell Automation product page
Official source	Rockwell Automation publication 1756-TD001W-EN-P, pages 55 to 57; official 1756-L74 product page

Inquiry

CONTACT

STELLA

Email Inquiry [email protected]

WhatsApp +86 18159889985

Applications & Features

16 MB user memory

The 1756-L74 provides 16 MB for application code and data with 0.98 MB of I/O memory.

Secure Digital storage

A 1 GB 1784-SD1 card ships preinstalled for nonvolatile project storage.

USB commissioning

The USB 2.0 port supports temporary local programming at 12 Mbps.

Chassis scalability

One-slot installation lets the controller use separately selected ControlLogix I/O and communication modules.

Communications

USB programming port	USB 2.0 full-speed port for temporary local programming; do not use as a permanent connection.
ControlLogix backplane	The controller communicates with I/O, power and communication modules through the 1756 chassis backplane.
Industrial networks	Install the required 1756 communication module for EtherNet/IP, ControlNet, DeviceNet or other network protocols.
Secure Digital card	The front card slot supports the preinstalled 1784-SD1 and compatible optional SD cards.
Energy storage module	The installed 1756-ESMCAP provides capacitor-based energy storage without a battery.

Installation

01 - Verify the exact controller

Match 1756-L74 on the quotation, controller label, packaging and Rockwell Automation product record.

02 - Confirm memory capacity

Verify that 16 MB user memory and 0.98 MB I/O memory meet the application requirement.

03 - Prepare the chassis

De-energize the compatible 1756 chassis and reserve one slot with an adequate ControlLogix power supply.

04 - Check storage and ESM

Confirm the 1784-SD1 card and selected energy storage module are correctly seated before commissioning.

05 - Commission communication

Use the USB port only for local programming and install separate chassis communication modules for required industrial networks.

Environment

Operating temperature

0 to +60 degrees C.

Storage temperature

-40 to +85 degrees C.

Relative humidity

5 to 95 percent, noncondensing.

Vibration

2 g at 10 to 500 Hz.

Shock

30 g operating and 50 g nonoperating.

Enclosure

Open-style equipment; install the controller and chassis in a suitable industrial enclosure.

FAQ

Q1. How can the exact quoted 1756-L74 be verified?

Match 1756-L74 on the quotation, nameplate and packaging. Confirm ControlLogix 5570, 16 MB user memory, 0.98 MB I/O memory, USB port, SD-card slot and no embedded network port.

Q2. How can New, Used or Refurbished condition be distinguished?

Request date-marked photos of the full label, serial and series markings, USB port, SD-card slot, energy storage module, key switch, display, backplane connector and housing. Check for connector wear, scratches, repaired plastic or altered labels.

Q3. How should supplier legality and reliability be checked?

Verify the supplier legal entity, registered address, payment beneficiary, invoice details and traceable contact. The written offer must identify Allen-Bradley, 1756-L74, condition and quantity.

Q4. Which specifications must engineering confirm before purchase?

Confirm 16 MB user memory, 0.98 MB I/O memory, USB commissioning, SD-card requirements, energy storage module, 1756 chassis and power-supply compatibility, firmware and required network modules.

Q5. What physical evidence should be requested before payment?

Ask for one date-marked photo set showing the complete 1756-L74 label, serial and series markings, USB port, SD-card area, 1756-ESMCAP, key switch, display, backplane connector, seals and packaging.

Q6. Can 1756-L73 or 1756-L75 replace 1756-L74?

Not automatically. 1756-L73 provides 8 MB and 1756-L75 provides 32 MB. Confirm memory, firmware, application size, energy-storage and exact catalog requirements before substitution.

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