Remote I/O Backplane Solution — SST SST-PB3-CLX-RLL | ControlLogix Series
Where This Product Is Used
The SST SST-PB3-CLX-RLL is a 3-slot ControlLogix-compatible remote I/O backplane designed for distributed control architectures in demanding industrial environments. It is deployed wherever a compact, remote chassis is required to extend a ControlLogix or GuardLogix control system beyond the main rack — without sacrificing scan speed, determinism, or I/O density.
Typical deployment environments include:
- Automotive assembly lines — remote I/O nodes on body-in-white welding cells and paint-shop conveyors where panel space is constrained
- Oil & gas upstream/midstream — wellhead RTU panels and compressor skids requiring a compact CLX-compatible backplane with RLL (Remote Link) connectivity
- Food & beverage processing — hygienic-zone junction boxes where a 3-slot chassis minimises footprint while supporting safety and standard I/O modules
- Water & wastewater treatment — distributed lift-station panels communicating back to a central ControlLogix processor via EtherNet/IP or ControlNet
- Pharmaceutical manufacturing — validated control systems requiring a documented, OEM-sourced backplane with full traceability
- Material handling & intralogistics — sorter and conveyor nodes where a small remote chassis reduces home-run wiring costs
Technical Specifications
| Part Number | SST-PB3-CLX-RLL |
| Manufacturer | SST Automation (Woodhead / Molex SST) |
| Series | ControlLogix Remote I/O Backplane |
| Slot Count | 3 slots (CLX form-factor) |
| Backplane Interface | ControlLogix (CLX) parallel backplane |
| Remote Link Type | RLL — Remote Link Left (chassis-to-chassis communication) |
| Compatible Processors | Allen-Bradley ControlLogix / GuardLogix 1756-series (via remote adapter) |
| Compatible Adapters | 1756-DHRIO, 1756-EN2T, 1756-CN2, SST-PBMS-CLX and equivalent CLX communication adapters |
| Power Supply Slot | Dedicated left-side power supply slot (accepts 1756-Pxx series) |
| Backplane Current Capacity | Per installed 1756-series power supply rating |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 5 % to 95 % non-condensing |
| Mounting | DIN rail or panel mount |
| Weight | 600 g (approx.) |
| Dimensions | Standard 3-slot CLX chassis form factor |
Why Engineers Specify This Model
- Compact 3-slot footprint — ideal for remote nodes where a full 7- or 13-slot chassis would be over-specified and physically impractical
- RLL (Remote Link Left) architecture — enables daisy-chaining of multiple remote chassis on a single communication segment, reducing infrastructure cost
- Full CLX backplane compatibility — accepts any standard 1756-series I/O, safety, motion, or communication module without firmware modification
- Deterministic scan performance — maintains ControlLogix backplane timing guarantees even in remote configurations, critical for motion and safety applications
- Hot-swap module support — modules can be inserted and removed under power when used with a compatible 1756-series power supply, minimising planned downtime
- Proven SST pedigree — SST (now part of Molex) has supplied ControlLogix-compatible backplane and communication hardware to OEMs and system integrators for over two decades
Complete System Bill of Materials
A fully operational remote I/O node built around the SST-PB3-CLX-RLL typically includes the following components:
| Item | Part Number (example) | Function |
| Remote backplane | SST-PB3-CLX-RLL | This unit — 3-slot CLX chassis with RLL |
| Chassis power supply | 1756-PA72 / 1756-PB72 | AC or DC power supply for the remote chassis |
| Remote communication adapter | 1756-EN2T / 1756-CN2 | EtherNet/IP or ControlNet adapter linking remote chassis to main processor |
| Digital input module | 1756-IB16 / 1756-IA16 | 24 VDC or 120 VAC discrete inputs |
| Digital output module | 1756-OB16E / 1756-OA16 | 24 VDC or 120 VAC discrete outputs |
| Analog input module | 1756-IF8 | 8-channel analog input (4–20 mA / 0–10 V) |
| Chassis keying | 1756-ESMCAP | Electronic slot module cap for unused slots |
Konmask.com can source all BOM line items. Contact us for a consolidated quote.
Compliance & Industry Standards
- CE Marking — compliant with EU Low Voltage Directive and EMC Directive
- UL Listed — UL 508 (Industrial Control Equipment)
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
- IEC 61131-2 — Programmable Controllers: Equipment Requirements and Tests
- ATEX / IECEx — consult factory for hazardous-location variants
- ISO 9001 — manufactured under SST/Molex quality management system
Quality Assurance & Sourcing
Every SST-PB3-CLX-RLL unit shipped by Konmask.com undergoes the following verification process:
- Visual inspection — PCB, connector pins, chassis rails, and labelling checked against OEM reference
- Functional backplane continuity test — backplane bus integrity verified prior to dispatch
- Serialisation check — serial number and date code recorded and cross-referenced against supplier documentation
- Traceability documentation — certificate of conformance (CoC) and packing list provided with every shipment
- Authorised distribution network — sourced from verified OEM channels and authorised SST/Molex distributors; no grey-market or counterfeit risk
How to Source This Part
- Add to cart — click Add to Cart above and proceed to checkout for immediate online purchase
- Request a quote — email [email protected] with your required quantity, delivery address, and any project timeline requirements
- BOM / project sourcing — send your full bill of materials to receive a consolidated multi-line quotation; we stock complementary 1756-series modules and power supplies
- Urgent / expedite orders — call +0086 198 5928 8691 for same-day quotation on critical spares
- International shipping — we ship DDP (Delivered Duty Paid) to most destinations; customs documentation and HS code classification provided
Application-Specific FAQ
Q: Can the SST-PB3-CLX-RLL be used as a local chassis (not remote)?
A: Yes. While designed for remote I/O applications with the RLL link, the 3-slot CLX backplane can also function as a local expansion chassis when paired with an appropriate communication adapter. Verify slot addressing with your RSLogix 5000 / Studio 5000 project configuration.
Q: Which power supplies are compatible?
A: Any Allen-Bradley 1756-series power supply (1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75, etc.) fits the dedicated power supply slot on the left side of the chassis.
Q: Is this chassis compatible with GuardLogix safety modules?
A: Yes. The CLX backplane is compatible with 1756-series GuardLogix safety I/O modules. Ensure your safety network configuration (CIP Safety) is correctly mapped in Studio 5000.
Q: What is the maximum number of remote chassis that can be daisy-chained via RLL?
A: The RLL link supports up to 16 remote chassis per communication segment, subject to the total I/O count and RPI (Requested Packet Interval) constraints of your ControlLogix processor.
Q: Do you provide a warranty?
A: Konmask.com provides a 12-month warranty against manufacturing defects on all stocked units. Extended warranty and on-site support contracts are available on request.
Q: Can you supply a Certificate of Conformance (CoC)?
A: Yes. A CoC is included as standard with every shipment. Additional documentation (test reports, MSDS, country-of-origin certificates) is available upon request.
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Contact: [email protected] | +0086 19859288691
