ProSoft Technology 3250-L532M Remote Terminal Unit SLC 5/03 Processor

The ProSoft Technology 3250-L532M is a specialized Remote Terminal Unit (RTU) designed to enhance SCADA (Supervisory Control and Data Acquisition) systems. It is based on the Allen-Bradley SLC 5/03 CPU and comes equipped with Modbus Slave functionality on Channel 0. This device allows seamless integration into industrial automation systems by enabling efficient communication with other Modbus-compatible devices and systems.

Key Features & Benefits

Allen-Bradley SLC 5/03-Based CPU: Utilizes the SLC 5/03 processor architecture, which offers a stable and widely adopted platform for industrial control applications.
Modbus Slave Protocol on Channel 0: Provides full Modbus Slave support, allowing the RTU to communicate with a Modbus Master device for reading and writing of data.
Easy Configuration: Configure the Modbus Slave settings via ladder logic by editing the integer file N100. This file includes essential parameters such as baud rate, slave address, and data format.
Advanced Diagnostic Features: The Modbus Slave driver provides comprehensive diagnostic information for troubleshooting, all accessible via the configuration files.

General Specifications

Modbus Protocol Support:
- RTU (binary) with CRC-16 error checking.
- ASCII with LRC error checking (supports both 7 and 8-bit formats).
- Supports Modbus function codes for reading and writing various data types like coils, discrete inputs, holding registers, and input registers.
- Supports reading and writing of floating-point values using the optional ‘Enron’ addressing range.
Communication Configuration:
- Slave Address Range: 1 to 127 (address 0 is used for broadcast).
- Baud Rate Range: 300 to 19,200 baud.
- Parity: Supports none, odd, or even parity.
- Stop Bits: 1 or 2 stop bits.
- Delays: Configurable delays for RTS send delay, RTS off delay, pre-send delay, and inter-character delay (0–2500 ms).
Modbus Master Capabilities:
- Allows Modbus Master to read/write data from/to the processor’s Status File (S2).
- Modbus Master can remotely monitor processor health, including real-time clock settings.
Channel 0 (RS-232C):
- Supports DF1 or Modbus Slave communication.
- DB-9 Male connector for RS-232C communication.
- Provides an interface for SLC programming and communication.
Channel 1 (DH-485):
- RJ45 port used for programming and communication over the DH-485 protocol.
- Suitable for both SLC programming and network access.

Hardware Specifications

Current Load:
- 500 mA @ 5 Vdc.
- 175 mA @ 24 Vdc.
Temperature Range:
- Operating: 0°C to 60°C (32°F to 140°F).
- Storage: -40°C to 85°C (-40°F to 185°F).
Shock Resistance:
- Operational: 30 g.
- Non-operational: 50 g.
Vibration:
- 5 g from 10 Hz to 150 Hz.
Humidity:
- 5% to 95% relative humidity (non-condensing).
LED Indicators:
- RUN: Indicates the processor is running.
- FORCE: Indicates output force state.
- FLT: Indicates fault condition.
- DH485: Indicates activity on the DH485 port.
- BATT: Indicates the status of the internal battery.
- MODBUS (RS232): Indicates Modbus activity on Channel 0.

Additional Functional Specifications

SLC 5/03 Functions:
- DF1 Programming Support: Allows programming using standard ladder logic.
- Auto-Switching Between DF1 and Modbus: Channel 0 can automatically switch between DF1 (for standard SLC programming) and Modbus Slave modes.
- Network Access: Allows access to and programming over DH-485 network.
- Inputs and Outputs: Supports up to 1024 inputs and 1024 outputs.
- Memory Configurations: Offers 16K memory capacity (model 3250-L532M).
- Floating-Point Math Support: Includes capabilities for floating-point operations.
- Built-In Real-Time Clock and Calendar: Enables precise time tracking.
Modbus Function Codes Supported:
- 1: Read output status (Coils).
- 2: Read input status (Discrete Inputs).
- 3: Read multiple data registers.
- 4: Read input registers.
- 5: Force single coil.
- 6: Write single register.
- 8: Loopback test (only address 0).
- 15: Write multiple coils.
- 16: Write multiple registers.

Processor Ports Overview

Channel 1 (DH485 Port):
- RJ45 jack used for SLC programming and DH485 communication.
Channel 0 (RS-232C Port):
- DB-9 Male port used for Modbus communication and SLC programming (DF1).

This ProSoft Technology 3250-L532M RTU solution is a powerful, flexible, and cost-effective tool for SCADA applications, particularly where Modbus communication is needed alongside Allen-Bradley SLC 5/03 programming capabilities. It offers advanced functionality, easy configuration, and a rugged design for demanding industrial environments.

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