B&R 3AT350.6 RTD Input Module AS2000/3000 Replacement

Product Overview

B&R 3AT350.6 RTD Input Module: Seamless AS2000/3000 System Upgrade & Replacement

The B&R 3AT350.6 is a six-channel RTD (Resistance Temperature Detector) input module engineered for the B&R AS2000 and AS3000 programmable controller series. As legacy AS2000/3000 installations approach end-of-support milestones and original 3AT350.6 units become increasingly difficult to source, plant engineers and procurement teams face mounting pressure to secure verified replacements that preserve wiring integrity, rack compatibility, and existing PLC program logic without triggering a full system redesign.

TOPNLMS stocks the 3AT350.6 as a direct, drop-in replacement module. Each unit is sourced from authorized supply chains, individually inspected prior to dispatch, and backed by a 12-month warranty. Whether you are managing a planned retrofit or responding to an unplanned failure, our inventory and expedited shipping from Xiamen are structured to minimize your control system downtime.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from an aging AS2000 or AS3000 control system to a modernized architecture rarely involves a single module swap. In practice, field engineers replacing the 3AT350.6 RTD input module will typically audit the surrounding rack and cabinet for associated components that may also be approaching end-of-life or that require reconfiguration to support the upgraded I/O subsystem.

On the power distribution side, the B&R 3PS465.9 power supply module is commonly found in the same AS3000 rack as the 3AT350.6 and should be verified for output stability before commissioning the replacement RTD module. Backplane integrity is equally critical: the B&R 3BP150.0 bus plate and associated rack hardware must be inspected for corrosion or connector wear that could cause intermittent communication faults after the new module is seated.

For sites running mixed analog and digital I/O, the B&R 3AI561.6 analog input module and B&R 3DO856.6 digital output module are frequently installed alongside RTD input modules in the same AS3000 rack. Confirming that these modules are operating within specification before the 3AT350.6 replacement is installed prevents misdiagnosis of post-swap temperature reading anomalies.

Communication architecture is another key consideration. Many AS2000/3000 installations use the B&R 3CP150.60 or 3CP360.60 CPU modules as the central controller. When replacing analog input modules, it is advisable to verify that the CPU firmware revision supports the 3AT350.6 hardware revision to avoid configuration mismatch errors during the first scan cycle after restart.

On the field wiring side, sites that use B&R X20 terminal blocks or third-party DIN-rail terminal modules for RTD sensor termination should confirm that the existing terminal assignments remain valid after the module swap. In installations where signal isolation is required between the RTD sensors and the backplane, a DIN-rail signal isolator (such as a Pt100 loop-powered isolator) may be inserted in the wiring path without any modification to the 3AT350.6 module itself.

For sites planning a broader migration from the AS2000/3000 platform to the B&R X20 system, the 3AT350.6 can serve as an interim replacement while the new X20 rack, X20CP1586 controller, and X20AT2222 RTD input module are being commissioned in parallel — a staged approach that eliminates the need for a single extended shutdown window.

Retrofit Guidance FAQ

Q: Do I need to modify my existing field wiring when installing the 3AT350.6?
No. The 3AT350.6 uses the same terminal block layout and wiring conventions as earlier 3AT350.x revisions. Both 2-wire and 3-wire Pt100/Pt1000/Ni100/Ni1000 sensor connections are supported without rewiring.

Q: Will my existing AS2000/3000 PLC program need to be modified?
In the vast majority of cases, no program changes are required. The 3AT350.6 occupies the same I/O address slot as its predecessors within the AS-Bus backplane architecture. Verify the slot address assignment in your B&R Automation Studio project before powering up to confirm no address conflicts exist.

Q: Is the 3AT350.6 compatible with the AS-Bus communication protocol used in my existing rack?
Yes. The module communicates exclusively via the internal AS-Bus backplane interface, which is consistent across the AS2000 and AS3000 series. No external communication cables or protocol converters are required.

Q: What is the physical installation space requirement?
The 3AT350.6 conforms to the standard AS2000/3000 module form factor. It occupies one slot in the existing rack and does not require additional DIN-rail space or cabinet modifications.

Q: Can this module be used as a spare part for preventive maintenance without immediate installation?
Yes. The module can be stored as a cold spare in a standard ESD-safe environment. TOPNLMS recommends storing spare modules in their original anti-static packaging at temperatures between 0°C and 55°C.

Q: What commissioning steps are recommended after installation?
After seating the module in the rack, perform a cold restart of the AS2000/3000 CPU, verify that the module is recognized in the I/O configuration scan, and confirm that all six RTD channels are returning valid temperature readings within the expected engineering unit range before returning the system to production.

Warranty Assurance

Every B&R 3AT350.6 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Our pre-shipment inspection process includes visual examination of the PCB and connector pins, functional verification of the backplane interface, and confirmation of module identification data against the order specification.

In the event of a confirmed defect within the warranty period, TOPNLMS will arrange a replacement unit at no additional cost. Our after-sales response target is within 24 hours of a warranty claim submission. Replacement units are dispatched from our Xiamen warehouse with expedited shipping to minimize the impact on your production schedule.

For procurement teams requiring documentation, we can provide a test report, packing list, and commercial invoice with each shipment. All units are shipped in ESD-safe packaging with appropriate export documentation for international customs clearance.

TOPNLMS maintains stock of the 3AT350.6 and related AS2000/3000 series components to support both emergency replacement orders and planned maintenance procurement cycles. Contact our technical sales team to confirm current stock availability, lead times, and volume pricing.

© 2026 TOPNLMS. All rights reserved.
Original Source: https://topnlms.com
Contact: [email protected] | +86 18359293191