SST 5136-CN-VM Ruggedized ControlNet Communications Module

Product Overview

SST 5136-CN-VM Ruggedized ControlNet Communications Module: Industrial Resilience for Harsh Environments

The SST 5136-CN-VM is a VME-form-factor ControlNet communications module engineered for continuous, fault-tolerant operation in the most demanding industrial environments. Designed to integrate seamlessly into VME-based control architectures, this module delivers deterministic, high-speed ControlNet network access where reliability is non-negotiable — from petrochemical processing floors to high-vibration mining conveyors and high-humidity water treatment facilities.

Built to withstand wide operating temperature ranges, elevated humidity, airborne particulates, and persistent electromagnetic interference (EMI), the 5136-CN-VM maintains stable network communication even when surrounding equipment — including variable frequency drives, high-current contactors, and large motor starters — generates significant electrical noise. Its robust VME bus interface ensures tight mechanical retention and signal integrity under continuous vibration loads common in heavy manufacturing and offshore installations.

Rugged Specifications Table

Comprehensive Protection Solutions

The 5136-CN-VM is rarely deployed in isolation. In a fully integrated control cabinet, it works alongside a range of complementary automation components to deliver end-to-end system reliability. On the network side, it pairs naturally with the SST 5136-PFB-VME PROFIBUS DP master module and the SST 5136-DNP-VME DeviceNet master, allowing engineers to bridge multiple fieldbus protocols within a single VME chassis — a critical advantage in hybrid automation architectures where legacy and modern networks coexist.

At the controller level, the 5136-CN-VM integrates with Allen-Bradley ControlLogix and CompactLogix PLCs via ControlNet backplane communication, enabling real-time I/O scanning and producer/consumer data exchange. When deployed alongside Rockwell 1756-CNB or 1756-CNBR ControlNet bridge modules, the system supports redundant network topologies that eliminate single points of failure on critical production lines.

For power conditioning in the same control enclosure, industrial-grade Phoenix Contact QUINT or PULS CP series DIN-rail power supplies provide the stable 24 VDC rail that the VME backplane and associated I/O modules depend on. Voltage transients and power dips — common near large motor drives — are absorbed before they can disrupt the ControlNet communication cycle.

On the I/O side, Allen-Bradley 1794 FLEX I/O modules connected over ControlNet deliver distributed analog and digital I/O to remote field devices, while 1756-OB16 digital output modules handle high-current actuator control within the main rack. Safety-rated modules such as the Allen-Bradley 1791DS GuardLink safety I/O further extend the architecture into SIL-rated safety loops, ensuring that the ControlNet backbone supports both standard and safety-critical data paths.

Terminal blocks and marshalling components from Weidmüller or Phoenix Contact complete the wiring infrastructure, providing reliable field-to-cabinet connectivity with vibration-resistant clamping that maintains contact integrity even in high-shock environments.

Application in Critical Infrastructure

In oil and gas upstream and midstream facilities, the SST 5136-CN-VM is deployed in wellhead control panels and pipeline SCADA systems where ControlNet’s deterministic scheduling guarantees that safety-critical valve position data reaches the DCS within defined scan cycles — regardless of network load. Its tolerance for wide temperature swings makes it equally suited to outdoor equipment shelters in desert or arctic climates.

In mining and mineral processing, the module manages communications between VME-based supervisory controllers and distributed conveyor drive systems. High levels of coal dust, silica particulate, and mechanical vibration from crushers and screens are constant challenges; the 5136-CN-VM’s sealed VME card-edge connector and conformal-coating-ready PCB design address these threats directly.

In power generation and grid substations, where EMI from high-voltage switching equipment can corrupt fieldbus signals, the module’s robust EMC design maintains ControlNet frame integrity. Utilities rely on this stability to coordinate protection relay logic and turbine governor feedback loops without communication-induced trips.

In water and wastewater treatment plants, the 5136-CN-VM connects VME controllers to remote pump stations and chemical dosing skids over ControlNet, supporting 24/7 unattended operation with the deterministic response times required by process safety instrumented systems (SIS).

In metallurgy and steel production, continuous casting lines and rolling mill drives demand sub-millisecond I/O response. The ControlNet protocol’s scheduled bandwidth allocation, managed through the 5136-CN-VM, ensures that position feedback from encoder modules and torque commands to drive inverters arrive on time, every scan cycle.

Security & Quality FAQ

Q1: What does the 12-month warranty cover, and how is a claim processed?
The 12-month warranty covers all manufacturing defects and functional failures under normal operating conditions from the date of shipment. If a unit fails within the warranty period, contact [email protected] with your order number and a fault description. We will arrange return shipping, perform failure analysis, and dispatch a replacement or repaired unit within the agreed lead time — at no additional cost to you.

Q2: How is each SST 5136-CN-VM tested before shipment?
Every unit undergoes a multi-stage outgoing quality inspection: visual inspection for physical damage, power-on functional verification, ControlNet network enumeration test, and VME bus communication check. Units that fail any stage are quarantined and not shipped. A test report is available upon request for customers with incoming inspection requirements.

Q3: Is the 5136-CN-VM compatible with my existing Rockwell / Allen-Bradley ControlNet system?
Yes. The SST 5136-CN-VM is fully compatible with Allen-Bradley ControlNet networks operating at 5 Mbps and integrates with RSNetWorx for ControlNet configuration software. It supports both scheduled (I/O) and unscheduled (messaging) connections, making it a drop-in replacement for legacy SST ControlNet VME cards in existing Rockwell-based architectures. If you have specific firmware version or chassis compatibility questions, our technical team can advise before purchase.

Q4: Can you guarantee long-term supply and spare-part availability for this module?
We maintain dedicated safety stock of the SST 5136-CN-VM and related 5136-series modules to support customers with multi-year maintenance contracts and planned shutdown schedules. For critical infrastructure operators who require guaranteed spare availability, we offer reserved inventory agreements. Contact us to discuss volume pricing, lead-time commitments, and consignment stock arrangements tailored to your plant’s maintenance strategy.