1. Product Overview

• Part Number: 5301-MBP-ASCII

• Manufacturer: ProSoft Technology

• Product Type: Industrial DIN‑rail mounted protocol gateway

• Function: Bridges Modbus Plus (MBP) industrial network with ASCII‑based serial devices (RS‑232/422/485). Enables legacy Modbus Plus PLCs to exchange ASCII text data with printers, displays, scanners, weigh scales, and custom serial instruments.

2. Main Features

1. Modbus Plus Interface: Full master/slave support, DB‑9F port, 1–247 node address range。

2. ASCII Serial Support: RS‑232/422/485, configurable baud rate (300–115.2k), parity, data/stop bits。

3. Flexible Modes: Receive‑only, transmit‑only, transmit‑receive；supports user‑defined termination characters (CR/LF, ETX, etc.)。

4. Data Mapping: Maps Modbus Plus register data to ASCII strings and vice versa；configurable start/end addresses。

5. Handshaking: RTS/CTS, XON/XOFF, or no handshake；adjustable RTS on/off delays。

6. Diagnostics: Real‑time status LEDs, error counters, and timeout monitoring。

7. Industrial Grade: Isolated serial ports, surge protection, wide temperature range。

8. Configuration: ProSoft Configuration Builder (PCB) software；save/load settings, online monitoring。

3. Technical Specifications

3.1 Power Supply

• Rated Voltage: 24 VDC

• Range: 18–36 VDC

• Max Power: ≤15 W

• Redundancy: Dual power input support

3.2 Modbus Plus Interface

• Connector: DB‑9F

• Protocol: Modbus Plus (master/slave)

• Network Speed: 1 Mbps

• Node Address: 1–247 (software configurable)

3.3 ASCII Serial Interface

• Ports: 1 × RS‑232/422/485 (DB‑9 or terminal block)

• Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k

• Data Bits: 7 or 8

• Stop Bits: 1 or 2

• Parity: None, Odd, Even

• Termination: CR, LF, ETX, user‑defined bytes, or fixed length

3.4 Environmental

• Operating Temp: −20°C to +60°C

• Storage Temp: −40°C to +85°C

• Humidity: 5%–95% (non‑condensing)

• Certifications: CE, UL, CSA

3.5 Physical

• Mounting: 35 mm DIN rail

• Dimensions: 120 × 80 × 35 mm

• Protection: IP30

4. LED Indicators

• PWR: Solid = power OK

• RUN: Blinking = 正常运行

• MBP: Blinking = Modbus Plus activity

• ASC: Blinking = ASCII serial activity

• ERR: Solid = fault (communication/configuration)

5. Installation & Wiring

1. Mount on DIN rail in cabinet.

2. Connect 24 VDC power (observe polarity).

3. Connect Modbus Plus cable to DB‑9F port.

4. Wire ASCII device to serial port (RS‑232/422/485 as required).

5. Set node address via DIP switches or software.

6. Configure with PCB software: serial parameters, data mapping, modes.

7. Download configuration and test communication.

6. Communication Functions

1. Modbus Plus → ASCII: Convert register values to ASCII strings (e.g., “TEMP=25.5”).

2. ASCII → Modbus Plus: Parse incoming ASCII data (e.g., “WEIGHT=100”) into registers.

3. Triggered Transmit: Send ASCII messages on value change or cyclic basis.

4. Timeout Handling: Configurable RX/TX timeouts with error logging.

5. Data Formatting: Swap bytes, add checksum (LRC), or pad strings。

7. Application Scope

• Legacy System Integration: Connect Modbus Plus PLCs to modern ASCII devices.

• Factory Automation: Link PLCs to printers, operator terminals, barcode scanners.

• Process Control: Interface with weigh scales, flow meters, and serial analyzers.

• Building Automation: Connect HVAC controllers to ASCII displays.

• Retrofit Projects: Upgrade old Modbus Plus systems without replacing PLCs。

8. Safety Precautions

1. Power Off: All wiring must be done with power disconnected.

2. Cable Separation: Keep serial cables away from high‑voltage power lines.

3. Grounding: Ensure proper grounding to avoid ESD damage.

4. Environment: Do not operate outside specified temperature/humidity ranges.

5. Configuration: Only qualified personnel should configure and troubleshoot。