1. Product Overview

• Model: ILX34‑MBS485 (ProSoft Technology)

• Type: Industrial serial communication module

• Form Factor: 1734 POINT I/O format (single‑wide, 12 mm)

• Host Systems:

  • Allen‑Bradley 1734 POINT I/O adapters

  • CompactLogix L1 processors (5370 L1)

• Function: Bridges EtherNet/IP (Logix side) ↔ Modbus RTU over RS‑485 (field devices)

• Role: Configurable as Modbus Master or Slave

2. Key Features

• RS‑485 half‑duplex, 2500 Vrms isolation

• Modbus RTU: Master/Slave selectable; supports Function Codes 01–06, 15, 16

• Master capacity: Up to 31 slaves; 30 commands per scan; 35 words/command

• Data size: Up to 1000 words (input/output)

• Baud rate: 1200–115200 bps (software configurable)

• Serial params: 7/8 data bits, 1/2 stop bits, No/Odd/Even parity

• Diagnostics: Live status in controller tags; per‑node health monitoring

• Control: Serial port enable/disable via ladder logic

• Configuration: Saved in CompactLogix ACD project; uses standard Studio 5000 AOP/AOI

• Distance: Up to 4,000 ft (1219 m) on RS‑485

3. Specifications

Interface

• Serial: 1× RS‑485 (terminal block)

• Protocol: Modbus RTU (Master/Slave)

• Isolation: 2500 Vrms

Power

• Input: 5 VDC (from POINT I/O backplane)

• Current: ~75 mA

Environmental

• Operating Temp: 0°C to +55°C (32°F to 131°F)

• Storage Temp: ‑40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Shock/Vibration: 30 g operational; 5 g @ 10–500 Hz

Physical

• Dimensions: 56 × 12 × 75.5 mm (H × W × D)

• Weight: ~0.1 kg

• Mounting: DIN rail (via POINT I/O base)

4. LED Indicators

• PWR: Green = backplane power OK

• STAT: Green = running; Red = fault

• TXD/RXD: Green flashing = serial activity

• LINK: EtherNet/IP connection status (via host adapter)

5. Typical Applications

• Connect Modbus RTU meters, drives, sensors to Rockwell Logix

• SCADA & remote field device interface

• Water/wastewater, energy, material handling

• Retrofits: add Modbus to existing POINT I/O systems

6. Advantages

• Native Logix integration: No gateway PC; config in Studio 5000

• Master/Slave flexibility

• Long‑distance RS‑485 (1.2 km)

• Compact: single‑wide POINT I/O, saves cabinet space

• Industrial isolation & wide temp