Allen Bradley 150-C85NBR SMC-3 Smart Motor Controller
Allen Bradley 150-C85NBR SMC-3 Smart Motor Controller
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Brand:Allen Bradley PLC Item No.:150-C85NBR Product Origin:USA Product Dimensions:206 x 72 x 130 mm Product Weight:2.25 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen-Bradley 150-C85NBR SMC-3 Smart Motor Controller is an industrial soft starter developed by Rockwell Automation for controlling three-phase AC motors. It combines solid-state motor starting, electronic overload protection, and integrated bypass functionality in a compact open-type design.
With an 85 A current rating and a 24V AC/DC control supply, the 150-C85NBR is designed for industrial motor control applications requiring controlled acceleration and stopping. Its adjustable current limit, selectable overload trip classes, and configurable starting parameters provide flexibility for different motor and load characteristics.
The controller also features an internal bypass, which helps reduce heat generation during normal operation. Its built-in diagnostic and protection functions support motor system maintenance and troubleshooting.
For industrial automation projects, the 150-C85NBR can be used in pump stations, conveyor systems, compressors, chillers, and other motor-driven equipment. When selecting or replacing this controller, engineers should verify motor full-load current, supply voltage, control voltage, starting duty, and short-circuit protection requirements.
Technical Specifications
Parameter
Description
Brand
Allen-Bradley
Manufacturer
Rockwell Automation
Model
150-C85NBR
Product Series
SMC-3
Product Type
Smart Motor Controller / Soft Starter
Rated Current
85 A
Line Voltage
200–480V AC
Phase
Three-phase
Frequency
50/60 Hz
Control Voltage
24V AC/DC
Wiring Configuration
3-wire
Enclosure Type
Open type
Motor Overload Protection
Integrated electronic overload
Selectable Trip Class
10, 15, 20
Current Limit Settings
150%, 250%, 350%, 450%
Starting Time Settings
2, 5, 10, 15, 20, 25, 30 seconds
Soft Stop
Supported
Internal Bypass
Yes
Protection Degree
IP2X
Dimensions
206 × 72 × 130 mm
Weight
2.25 kg / 4.96 lb
Recommended Related Models
The following Allen-Bradley SMC-3 controllers are worth considering for comparison and motor-control system maintenance:
150-C60NBR – SMC-3 soft starter with a 60 A current rating and 24V AC/DC control supply.
150-C85NBD – 85 A SMC-3 controller with a 100–240V AC control supply.
150-C108NBR – SMC-3 controller with a higher current rating and 24V AC/DC control supply.
150-C135NBR – Higher-current SMC-3 motor controller with 24V AC/DC control.
150-C85NCR – 85 A SMC-3 controller rated for 600V applications with 24V AC/DC control.
Popular Related Models
Allen-Bradley 150-C3NBR SMC-3 Smart Motor Controller
Allen-Bradley 150-C9NBR SMC-3 Smart Motor Controller
Allen-Bradley 150-C16NBR SMC-3 Smart Motor Controller
Allen-Bradley 150-C60NBR SMC-3 Smart Motor Controller
Allen-Bradley 150-C85NBD SMC-3 Smart Motor Controller
Allen-Bradley 150-C108NBR SMC-3 Smart Motor Controller
Applications
The Allen-Bradley 150-C85NBR is an SMC-3 Smart Motor Controller designed for three-phase AC motor starting and stopping. It uses solid-state soft-start technology to control motor acceleration, helping reduce mechanical stress and electrical disturbances associated with direct-on-line starting.
Typical industrial applications include:
Pump systems: Controlling motor acceleration in industrial water and fluid-handling equipment.
Conveyor systems: Reducing mechanical shock during motor startup.
Compressors: Managing motor starting conditions in industrial air and gas systems.
Chillers and HVAC equipment: Providing controlled starting for motor-driven equipment.
Production machinery: Supporting smooth motor operation in automated manufacturing processes.
Industrial material handling: Reducing starting stress on motors, gearboxes, and connected machinery.
Advantages and Key Features
85A Motor Control Capacity
The 150-C85NBR supports a rated current of up to 85 A for line-connected motor applications, making it suitable for a range of industrial three-phase motor control systems.
Soft-Start and Soft-Stop Functions
The controller gradually increases motor voltage during startup and supports controlled stopping. These functions help reduce mechanical shock and improve motor starting performance.
Integrated Electronic Overload Protection
Built-in electronic motor overload protection helps protect connected motors against sustained overload conditions. Users can select Trip Class 10, 15, or 20 according to application requirements.
Internal Bypass Design
The integrated bypass reduces continuous power losses and heat generation after the motor reaches operating speed.
Flexible Starting Configuration
The controller provides selectable current limits of 150%, 250%, 350%, and 450% of motor full-load current. Starting time and initial torque can also be configured to suit different motor and load characteristics.
24V AC/DC Control Supply
The 150-C85NBR uses a 24V AC/DC control supply, making it suitable for control panels using standard 24V control circuits.
Technical FAQs
1. What is the main function of the Allen-Bradley 150-C85NBR?
The 150-C85NBR is a solid-state soft starter designed to control the starting and stopping of three-phase AC motors. It gradually increases motor voltage during startup to reduce electrical and mechanical stress.
2. What is the rated current of the 150-C85NBR?
Its rated current is 85 A for line-connected motor applications. The actual motor current must be checked against the controller's operating conditions and application requirements.
3. What is the control voltage of this SMC-3 controller?
The 150-C85NBR uses a 24V AC/DC control supply. Confirm the control circuit wiring and polarity requirements before installation.
4. Does the 150-C85NBR support three-phase motors?
Yes. It is designed for three-phase AC motor applications and uses a three-wire power connection.
5. Does this controller have built-in overload protection?
Yes. It includes electronic motor overload protection with selectable Trip Class 10, 15, and 20 settings. The selected class should match the motor and starting conditions.
6. What current limit settings are available?
The controller provides selectable current limits of 150%, 250%, 350%, and 450% of the motor's full-load current.
7. Does the 150-C85NBR have an integrated bypass?
Yes. Its internal bypass function reduces power losses and heat generation during normal motor operation after startup.
8. What should be checked if the motor fails to start?
Check the incoming three-phase supply, control voltage, start command, wiring connections, overload status, and controller configuration. Also verify that the motor and load are within the controller's ratings.
9. Can the 150-C85NBR replace a conventional contactor?
It can perform controlled motor-starting functions, but it should not automatically be treated as a complete replacement for a conventional motor protection and switching arrangement. Appropriate short-circuit protection and isolation devices must be selected separately according to the installation requirements.
10. What is the difference between 150-C85NBR and 150-C85NBD?
Both are 85 A SMC-3 controllers with the same general motor-control function. The key difference is the control supply: the 150-C85NBR uses 24V AC/DC, while the 150-C85NBD uses a 100–240V AC control supply.
