PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1756-L61 is a ControlLogix controller designed for industrial automation architectures. It features 2 MB of user memory and 478 KB of dedicated I/O memory. The controller executes up to 32 configurable tasks simultaneously. Each task supports up to 100 distinct programs for structured logic organization. This execution structure allows precise management of complex control routines.
The unit communicates across external systems using an integrated RS-232 serial interface. It handles up to 250 controller connections for distributed network operations. The hardware accommodates 128,000 digital I/O points and 4,000 analog I/O points. Controller redundancy is supported to maintain process availability during hardware faults. Optional nonvolatile memory expansion up to 128 MB supports program and data storage.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| GTIN | 10612598300706 |
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| Weight | 1.31 lbs (0.60 kg) |
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| UPC | 612598300709 |
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| Maximum Controller Tasks | 32 Tasks |
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| Maximum Programs per Task | 100 Programs per Task |
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| Serial Ports | 1 RS-232 Port |
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| Maximum Controller Connections | 250 Connections |
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| Controller Redundancy | Supported |
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| User Memory | 2 MB |
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| I/O Memory | 478 KB |
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| Optional Nonvolatile Memory Capacity | 128 MB |
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| Maximum Digital I/O | 128,000 I/O |
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| Maximum Analog I/O | 4000 I/O |
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TECHNICAL INFORMATION
Features
- Provides 2 MB of user memory and 478 KB of dedicated I/O memory.
- Supports up to 32 tasks with up to 100 programs per task.
- Equipped with one built-in RS-232 serial communication port.
- Supports up to 250 simultaneous controller connections.
- Manages up to 128,000 digital I/O and 4,000 analog I/O points.
- Full support for controller redundancy configurations.
TECHNICAL INFORMATION
Connections / Interfaces
- The unit includes a standard RS-232 serial port for direct programming and serial network interfacing.
- It connects directly to the ControlLogix backplane for communication with chassis I/O and network modules.
TECHNICAL INFORMATION
Compatibility
- Operates within standard Allen-Bradley ControlLogix 1756 chassis.
- Compatible with optional 128 MB nonvolatile memory expansion cards.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSOperates within standard Allen-Bradley ControlLogix 1756 chassis. Compatible with optional 128 MB nonvolatile memory expansion cards.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
How much user memory is available on the 1756-L61 controller?
The 1756-L61 provides 2 MB of user memory. It also includes 478 KB of dedicated I/O memory.
Does the 1756-L61 support controller redundancy?
Yes, controller redundancy is supported by the 1756-L61 hardware architecture.
What communication interfaces are built into the 1756-L61?
The unit features a single RS-232 serial port. Additional network protocols require separate ControlLogix communication modules.
What is the maximum I/O capacity of the 1756-L61?
The controller supports up to 128,000 digital I/O points and 4,000 analog I/O points.
