Allen‑Bradley 2080-LC20-20QBB Programmable Logic Controller

Catalog Code Breakdown

Native I/O Allocation (20 Pontos)

Entradas: 12-point DC24V Digital Inputs

Terminals I-00~I-11, sinking/sourcing compatible (configurável)

Resultados: 8-point DC24V NPN Transistor Outputs

Terminals O-00~O-07, NPN transistor type. AC loads cannot be driven directly.

⚠️ Distinction:

2080-LC20-20QBB = NPN transistor output

2080-LC20-20QBBR = Relay output version

Principais especificações técnicas

1. Fonte de energia: 24 CCV (operating range:18~30 V CC)
2. Memória de programa: 10K instructions
3. Variable Memory: 10K bytes
4. Interfaces de comunicação

USB (programming port)

Embedded RS485 (Modbus RTU Master/Slave)

5. Capacidade de Expansão

✅ Supports Micro800 plug-in modules (analog I/O, RTD/TC, high-speed counter, serial modules)

✅ Maximum 4 plug-in modules can be installed

6. High-speed Functions

4-channel High-Speed Counter (HSC), máx.. 100kHz

4-channel Pulse Train Output (Tomada de força), máx.. 100kHz for basic positioning control

7. Classificações Ambientais

Temperatura operacional: 0 ~ 55 ℃

Temperatura de armazenamento: -40 ~ 85 ℃

Classe de proteção: IP20, cabinet mounting only

Software Requirement

Software de programação: Bancada de componentes conectados (CCW)

Minimum supported version: CCW V8.0 and above

Aplicações Típicas

Small conveying equipment, máquinas de embalagem, fã & controle da bomba, custom automated tooling, Controle de climatização, basic stepper/servo positioning systems.

Diretrizes de seleção & Armadilhas Comuns

1. NPN sinking transistor output: Load negative wire connects to PLC output terminal; AC loads cannot be driven directly. Use DC24V solenoid valves preferentially.
2. Sem porta Ethernet integrada! Ethernet communication requires additional Ethernet plug-in module (por exemplo. 2080-EWEB).
3. Freewheeling diodes are recommended for inductive loads to avoid transistor breakdown caused by back EMF.
4. Micro820 does not support remote I/O, only local plug-in expansion available.

Substituições diretas & Comparação de séries

Same I/O count relay variant: 2080-LC20-20QBBR

Higher I/O capacity: Upgrade to Micro830 (2080-LC30 series)

Complete Reference for 2080-LC20-20QBB

(Terminal Wiring + Modbus RTU Configuration + PTO Program + Solução de problemas + Código HS)

1. Hardware Terminal Definition & Guia de fiação

Modelo: Micro820 2080-LC20-20QBB

Fonte de energia: CC24V; DE:12-channel DC24V; FAZER:8-channel NPN Sinking Transistor Output

⚠️ Embedded serial port: Shared RS485/RS232 without galvanic isolation

1.1 Terminais de energia (PLC Main Power)

1.2 Digital Input Terminals (12 DE: EU-00 ~ I-11)

Terminal comum: CM0

Sinking Wiring (Mais Comum): CM0 connected to DC24V+; NPN sensor output to I-xx; sensor negative to 0V

Sourcing Wiring: CM0 connected to 0V; PNP sensor output to I-xx; sensor positive to DC24V

EU-00, EU-01, EU-02, EU-03: Dedicated high-speed counter channels

DI Terminal List:

EU-00, EU-01, EU-02, EU-03, EU-04, EU-05, EU-06, EU-07, EU-08, EU-09, I-10, I-11

1.3 Digital Output Terminals (8 DO O-00 ~ O-07, NPN)

Terminal comum: -CM0

✅ NPN Sinking characteristic: Terminal O-xx approximates 0V when energized

Standard Wiring Scheme:

+DC24V → Load positive terminal; Load negative terminal → O-xx; All -CM0 terminals tied to DC24V 0V

Ó-00, Ó-01: PTO pulse output channels (de alta velocidade)

Freewheeling diode must be reverse-paralleled for inductive loads (válvulas solenóides)

DO Terminal List: Ó-00, Ó-01, Ó-02, Ó-03, Ó-04, Ó-05, Ó-06, Ó-07

1.4 Embedded RS485/RS232 Serial Terminal (6-pin terminal block)

RS485 Wiring: Pino 7(B) ↔ Device B terminal; Pino 8(UM) ↔ Device A terminal; Pin6 shared ground

❗ No galvanic isolation on this port. Install isolated repeater for long-distance communication.

2. Step-by-step CCW Modbus RTU Configuration (Master/Slave Supported)

Programas: Connected Components Workbench CCW V8.0 and above

Step1: Project Hardware Configuration

1. Create new project → Select controller 2080-LC20-20QBB
2. Double-click [Controlador] on left pane to open configuration page → Locate [Serial Port]
3. Driver selection: Modbus RTU

Step2: Communication Parameters (Recommended Defaults)

Step3: Register Mapping (Critical Section)

Modbus address mapping rule for Micro820

Coils (0x addresses): PLC BOOL variables

Discrete Inputs (1x addresses): Read-only BOOL status

Holding Registers (4x addresses): INT/DINT (Read & Write, mais amplamente utilizado)

Input Registers (3x addresses): Read-only INT values

Nota importante: Micro800 series does not support automatic tag mapping for Modbus. Use function blocks for master read/write operations:

`MODBUS_READ` / `MODBUS_WRITE`

3. PTO Pulse Positioning Control (O0/O1 Pulse Output for Stepper/Servo)

Hardware Channel Assignment

PTO0: Pulse Output → O-00; Direction signal recommended on O-02

PTO1: Pulse Output → O-01; Direction signal recommended on O-03

Max output frequency: 100kHz

Output type is NPN sinking. Servo drive pulse input setting must be low-level active / sinking input

CCW Configuration Workflow

1. Controller Configuration → Enable [Saída de pulso (PTO0)]
2. Set maximum frequency: 100000 Hz; Acceleration/Deceleration time: 500EM
3. Call motion function block `PTO_RUN` inside program

Structured Text Example: Relative Positioning

⚠️ Critical Limitation: Micro820 does not support electronic cam or multi-axis synchronization; only basic point-to-point positioning available.

4. Contador de alta velocidade (HSC) Configuração (I0~I3)

4 independent HSC channels, support single-phase input & quadrature encoder with 4x multiplication

Common operation modes:

Mode0: Single-phase up-counting

Mode4: Quadrature encoder, 4x frequency multiplication mode

5. Fiação & Selection Hard Rules (Risk Avoidance)
6. 2080-LC20-20QBB = NPN sinking output. AC loads cannot be driven directly. Add intermediate relays for AC loads.
7. Do not overload transistor outputs continuously: 0.3A per point maximum (ambient temperature 55℃)
8. RS485 port non-isolated. Communication errors easily occur under multi-ground power supply systems; implement shared ground or galvanic isolation.
9. No native Ethernet port. Install plug-in module 2080-EWEB if Ethernet connection is required.
10. Máximo 4 plug-in modules supported. Remote I/O expansion is not available.
11. Use shielded cables for pulse wiring; route away from power cables of contactors and inverters to reduce interference.
12. HS Code Reference for Import & Export Customs Declaration

8537101100

Descrição: Controlador lógico programável (CLP)

⚠️ Reference only. Confirm classification with local customs authority before formal customs clearance.

7. Matriz de solução de problemas de falhas comuns

8. Official Manual Reference

Manual do usuário: 2080-UM005E-EN-E (Micro820 Controller User Manual)

Allen‑Bradley 2080-LC20-20QBB (Micro820) Programmable Controller Overview

1. Posicionamento do produto

2080-LC20-20QBB is an Allen‑Bradley Micro820 compact integrated PLC manufactured by Rockwell Automation. Designed for standalone OEM machinery and small complete automation systems. It replaces conventional control circuits built with massive intermediate relays. Equipped with integrated digital & analog I/O and multiple communication ports, Montável em trilho DIN. Target market: compactar, low-cost standalone automation solutions.

Catalog Summary

2080: Micro800 series identifier

LC20: Micro820 controller platform

20: 20 native I/O points

P: 24V DC sourcing (PNP) saída digital

BB: Onboard 4 entradas analógicas +1 saída analógica, PTO pulse output, embedded Ethernet

2. Native Hardware I/O Specifications
3. Entradas Digitais:12-point DC24V (configurable sinking/sourcing)

Signal acquisition: Photoelectric sensors, proximity switches, interruptores de limite, start/stop pushbuttons, parada de emergência, door interlock switches

2. Saídas Digitais:7-point DC24V PNP sourcing output

Drive small solenoid valves, indicator lamps, intermediate relays (por exemplo. MY2N-GS), contactor coils

3. Integrated Analog Channels (Vantagem Central)

4 entradas analógicas: 0~10V, 0~20mA, thermistor temperature acquisition supported

1 saída analógica: 0~10V / 0~20mA, used for inverter speed regulation and modulating valve control

4. Funções de controle de movimento

Integrado 1 channel PTO/PWM pulse output, capable of driving stepper motor controllers for basic point positioning

5. Capacidade de Expansão: 2 plug-in slots for high-speed counters, serial ports and additional I/O modules
6. Funções principais

3.1 Discrete Logic Control (Função básica)

Based on signals from sensors and operation buttons, execute programmed sequence, interlock, mutual lock and start-stop logic:

Sequential start/stop of conveyors, automatic cylinder cycling, automatic machine workflows, safety loop judgment and fault alarm output.

Can be paired with MY2N-GS intermediate relays to drive high-power loads indirectly.

3.2 Analog Process Control (Advantage of Onboard Analog Channels)

Collect temperature, pressão, liquid level and flow signals from transducers

Built-in PID function: Constant temperature control, constant pressure water supply, air volume regulation; Analog output to adjust inverter speed and proportional valves.

3.3 High-speed Signal Processing

High-speed counters read encoder pulses (velocidade & position measurement); PTO pulses implement basic stepper positioning.

3.4 Communication Networking

1. EtherNet/IP Ethernet Port

Connect HMI touchscreens, SCADA host computers and other Rockwell PLCs for remote monitoring, parameter access and program upload/download.

2. RS232/RS485 (Non-isolated Serial Port)

Modbus RTU Master/Slave interface to connect inverters, instruments and third-party sensors.

3. USB Programming Port: Direct connection to PC for program download and online debugging.

3.5 Data Storage, Recipe & Log Management

Embedded RTC real-time clock: Timed tasks, timestamp for fault logging

MicroSD card slot: Store production recipes, runtime logs, registros de falhas; support program backup & one-click restore.

3.6 HMI Expansion

Supports external remote text display 2080‑REMLCD, enabling parameter modification and alarm display without additional touchscreen panels.

4. Indústrias Típicas & Equipamento
5. Máquinas de embalagem: Small sealers, rotuladores, máquinas de enchimento, miniature sorting conveyor systems
6. AVAC & Tratamento de Água: Small pump stations, unidades de tratamento de ar, constant temperature water tanks, chemical dosing systems
7. Máquinas Alimentares & Central Kitchen Equipment: Washing lines, material conveyors, temperature-controlled ovens, smoke exhaust control systems
8. Custom Automation: Assembly tooling, bancadas de teste, small transfer equipment
9. Auxiliary control for machine tools, material conveying lines
10. Laboratory equipment, small constant-temperature aging equipment
11. Software de programação

Software de programação: Bancada de componentes conectados (CCW)

Idiomas suportados: Diagrama de escada (LD), Diagrama de blocos funcionais (DCT), Texto Estruturado (ST), compliant with IEC61131‑3

6. Application Boundaries

✅ Suitable for: Standalone machines with limited I/O, analog acquisition/PID demand, Ethernet networking requirement, cost-sensitive OEM equipment

❌ Not suitable for: Multi-axis servo synchronization, large-scale distributed production lines, massive remote I/O, high safety-level safety circuits (install dedicated safety relays such as G9SX for safety functions)

Supplement Remarks

1. Terminology strictly follows Rockwell Automation official datasheet standards, suitable for export tender documents, equipment manuals and overseas product catalogs;
2. Consistent industrial automation vocabulary matching international engineering conventions;
3. If you need Russian translation or condensed datasheet version, I can process further.