Allen-Bradley · PLC I/O / Comms Module

1756-CN2R/B Allen-Bradley ControlLogix

Yes. Star Automations has 1 unit of 1756-CN2R/B (Allen-Bradley part number) in stock in India, condition: New (as listed). Ask for a quote on WhatsApp +91 97866 22233 or at starautomations.com. We ship across India, support customers from Pondicherry, Chennai, Bengaluru and Hyderabad, and also repair this family.

In stock in IndiaNew (as listed)1 unitLast counted: Oct 2026

WhatsApp for a quote Request a quote Call +91 97866 22233

01Key facts

1756-CN2R/B at a glance

Part number	1756-CN2R/B
Also written as	—
Brand	Allen-Bradley (part number prefix; confirmed from the nameplate photo)
Family	Allen-Bradley ControlLogix
Category	PLC I/O / Comms Module
Condition	New (as listed)
Quantity band	1 unit
Ships from	India (Star Automations stock)
Invoice	GST invoice
Price	On request

02Specifications

Specifications

Full specifications on request (we share the nameplate photo).

03Fault codes

Common fault codes for this family

Common codes published for this family (check your manual). Wording can vary by firmware and version.

Code or symptom	First check
module OK LED red / flashing	Read the diagnostic in the OEM software and check the supply, wiring and seating of the module.
fault code in Studio 5000	Read the diagnostic in the OEM software and check the supply, wiring and seating of the module.

Need it repaired instead? See the next section.

04Repair

Need it repaired instead?

Repair your faulty 1756-CN2R/B

Send us your faulty 1756-CN2R/B. Our bench repairs Allen-Bradley ControlLogix at component level and returns it with a test report. See a sample test report.

Repair options Ship it to Star

05Training

Train your team on Allen-Bradley ControlLogix

Train your maintenance team on Allen-Bradley ControlLogix faults: hands-on and remote troubleshooting sessions built on 25+ years of bench repair. Your team stays in charge; we make it stronger.

Engineer training at Star Automations

06Quote

Request a quote for 1756-CN2R/B

Price on request. The quote states warranty terms and dispatch timing. Prefer chat? WhatsApp +91 97866 22233.

07FAQ

1756-CN2R/B — common questions

Is 1756-CN2R/B in stock in India?

Yes. Our stock records list 1 unit of 1756-CN2R/B (Allen-Bradley part number), condition: New (as listed). Last counted: Oct 2026. Stock can change, so confirm on WhatsApp +91 97866 22233 before you order. We ship across India.

What condition is it in?

New (as listed). We state the condition exactly as listed and do not describe a part as better than it is. Warranty terms are stated on the quote, and a nameplate photo is shared on request.

Can you test it before dispatch?

Yes, a bench check is available on request; tell us when you ask for the quote. Our bench has an oscilloscope, electronic load tester, LCR meter and hi-pot tester, used as the part type needs. The test details are shared with the quote.

Do you give a GST invoice?

Yes. Every sale carries a GST invoice. Send your company name and GSTIN with the quote request so that the invoice matches your records. Price is on request and is shared with the quote.

Can you repair my faulty 1756-CN2R/B instead?

Yes, where repair is practical. Our bench repairs Allen-Bradley ControlLogix at component level and returns the unit with a test report. WhatsApp the fault first for an opinion, or ship the unit to Star Automations.

What does module OK LED red / flashing mean on Allen-Bradley ControlLogix?

module OK LED red / flashing is listed among the common codes published for this family; wording can vary by firmware, so check your manual. First check: Read the diagnostic in the OEM software and check the supply, wiring and seating of the module. If the unit still faults, send it to us for repair.

ISO 9001:2015 certified (Puducherry) · Refurbishment authorisation from the Puducherry Pollution Control Committee · 25+ years · Pondicherry, Chennai, Bengaluru, Hyderabad

Brand names and part numbers belong to their owners and are used only to identify parts. Star Automations is an independent supplier and repairer.