Allen Bradley 1756-L61 1756-L65 ControlLogix Logix5561 Processor 2MB Memory

The Allen‑Bradley 1756‑L61 is a ControlLogix® 5561 programmable automation controller from Rockwell Automation. It offers 2 MB of user memory and supports up to 128,000 digital I/O or 4,000 analog I/O points, making it suitable for medium‑scale automation and process control applications.

Item nº :
1756-L61
Pedido (MOQ) :
1
Pagamento :
EXW
Origem do produto :
USA
Tempo de espera :
3-5days
Peso :
0.5KG

Product Details

Specification	Description
Manufacturer	Rockwell Automation (Allen‑Bradley)
Model	1756‑L61
Product Family	ControlLogix® 5561
Product Type	Programmable Automation Controller (PAC)
User Memory	2 MB
I/O Memory	478 KB
Max Digital I/O	128,000 points
Max Analog I/O	4,000 points
Non‑Volatile Storage	CompactFlash card (e.g., 1784‑CF128), recommended for program backup
Max Controller Connections	250
Tasks / Programs	32 tasks, up to 100 programs per task
Built‑in Port	1 x RS‑232 serial port (DF1, DH‑485, ASCII, Modbus via logic)
Supported Motion	Embedded SERCOS interface
Backplane Current	1.2 A @ 5.1V DC; 14 mA @ 24V DC
Power Dissipation	3.5 W
Operating Temperature	0°C to +60°C
Protection Class	IP20 (open‑type, rack‑mounted)
Programming Software	RSLogix 5000 / Studio 5000 Logix Designer (supports up to v20.019)
Battery Options	Series A: 1756‑BA1, 1756‑BATM; Series B: 1756‑BA2
Lifecycle Status	Discontinued (replaced by 1756‑L71)

Related Product Model Recommendations

Model	Description	Typical Application
1756‑L71	Primary functional replacement – 2 MB memory, built‑in USB, SD card slot, active product	New projects or system upgrades
1756‑L62	4 MB memory variant of the same generation, also discontinued	Applications requiring more memory within legacy systems
1756‑L63	8 MB memory variant, discontinued	Large‑scale legacy applications
1756‑L61S	GuardLogix safety version of the L61	Applications requiring safety certification (SIL3/PLe)
1756‑EN2T	EtherNet/IP communication module	Adding Ethernet network connectivity to L61
1784‑CF128	128 MB CompactFlash memory card	Non‑volatile program storage
1756‑BA1 / 1756‑BATM	Replacement battery for Series A L61 controllers	Memory retention backup

1756-A10	1794-IE8XT	1769-IF4I
1756-A13	1794-IF2XOF2I	1769-IF4XOF2
1756-A17	1794-IF4I	1756-OF4
1756-A4	1794-IF8IH	1769-IG16
1756-A7	1794-IG16	1769-IM12
1756-BA1	1794-IH16	1769-IQ16
1756-BA2	1794-IJ2	1769-IQ16F
1756-BATA	1756-IF16	1769-IQ32
1756-BATM	1794-IM8	1769-IQ32T
1756-CFM	1794-IP4	1769-IQ6XOW4
1756-CN2	1794-IR8	1769-IR6
1756-CN2R	1794-IRT8	1769-IT6
1756-CNB	1794-IRT8K	1756-L61

Payment & Delivery

FAQs

Q1: Is the 1756‑L61 still in production?

No. The 1756‑L61 has been discontinued by Rockwell Automation . The recommended functional replacement is the 1756‑L71, which offers enhanced features including a USB programming port and SD card slot .

Q2: What is the user memory capacity of the 1756‑L61?

The controller has 2 MB of user memory and 478 KB of I/O memory .

Q3: Does the 1756‑L61 have built‑in Ethernet?

No. The L61 does not have an embedded Ethernet port. It requires a separate communication module such as a 1756‑ENBT or 1756‑EN2T for EtherNet/IP connectivity .

Q4: What is the difference between Series A and Series B of the 1756‑L61?

The main differences are:

Battery type: Series A uses 1756‑BA1 or 1756‑BATM; Series B uses 1756‑BA2 .
CompactFlash access: Series B allows front‑accessible CompactFlash card insertion/removal .
Firmware: Series B requires revision 13.40 or later .

Q5: Can the 1756‑L61 be used as a direct replacement for the older 1756‑L55?

Yes. The L61 is a direct upgrade path from the L55. In RSLogix 5000, you can change the controller type in the project properties from 1756‑L55 to 1756‑L61 and download the converted program . However, once converted, the project cannot be loaded back to an L55 controller.

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Allen Bradley 1756-L61 1756-L65 ControlLogix Logix5561 Processor 2MB Memory

Product Details

Related Product Model Recommendations

Payment & Delivery

FAQs

AB 1756-L61