ABB 3BSE017427R1 NBIO-21CU Analog I/O Unit

ABB NBIO-21CU, part number 3BSE017427R1, is a universal analog I/O unit designed for ABB AC500 PLC and S800 I/O system. It integrates multi-channel analog input and output circuits, collecting field sensor signals and converting digital control commands into analog signals to drive field actuators.

This module supports configurable signal ranges including voltage, current and temperature measurement with 16-bit high resolution. It adopts DIN rail mounting and side bus extension for flexible cabinet layout. It is widely used as spare replacement parts for factory automation, water treatment and process control cabinet maintenance and retrofit projects.

Main Specifications

1. Brand: ABB; Model: NBIO-21CU; Part No: 3BSE017427R1; Type: Analog I/O Unit
2. Compatible System: AC500 PLC / S800 I/O system; Resolution: 16-bit
3. Input: 4 single-ended or 2 differential analog input channels
4. Signal Types: Voltage, current, RTD temperature signals; Built-in signal filter
5. Installation: DIN rail mount; Communication: S800 internal side bus
6. Operating Temp: 0℃ ~ +60℃; Protection: IP20; Built-in watchdog timer
7. Supply Status: Spare analog I/O module for ABB AC500 automation control rack

Core Functions

1. Acquire analog signals from field transmitters, temperature sensors and process detectors.
2. High-precision A/D conversion transmits measured analog values to AC500 PLC controller.
3. Convert digital control commands from PLC into standard analog output signals for valve actuators.
4. Built-in noise filter suppresses field interference and improves signal stability in industrial sites.
5. Side bus interface supports cascading expansion of multiple S800 I/O modules on DIN rail.
6. Watchdog timer and channel self-diagnosis detect signal faults and report alarms to the control system.

Application Scenarios

1. ABB AC500 PLC automation control cabinets in manufacturing and water treatment plants.
2. Temperature, pressure and flow signal acquisition and analog closed-loop regulation.
3. Replacement of defective analog I/O units in existing S800 I/O racks.
4. Spare parts inventory for factory automation and process industry maintenance teams.
5. System retrofit and I/O expansion of legacy ABB AC500 PLC control systems.
6. Chemical, food & beverage and energy process control requiring multi-type analog measurement.

FAQ

1. Q: What is ABB NBIO-21CU 3BSE017427R1?
   A: It is a universal analog I/O unit for ABB AC500 PLC and S800 I/O system, supporting analog signal collection and output.
2. Q: What is the resolution of this module?
   A: It adopts 16-bit high resolution for accurate analog measurement and output control.
3. Q: What mounting method does it use?
   A: DIN rail mounting, modules can be cascaded via side bus to expand I/O points conveniently.