Product Overview
The ProSoft Technology ILX34‑MBS485 is a 1734 Point‑I/O form‑factor Modbus serial module built for Rockwell Automation CompactLogix L1 controllers and distributed Point‑I/O adapter systemsProSoft Te…. It delivers RS‑485 physical‑layer connectivity to interface Modbus‑RTU or Modbus‑ASCII field instruments, drives, meters and sensors. Configurable as either Modbus Master or Slave, it exchanges process data directly with the controller via Point‑bus backplane. All configuration is completed inside RSLogix 5000 / Studio 5000 without separate utility software, simplifying project deployment and maintenance for factory and process automation retrofitsProSoft Te….
Series
ILX34 series communication modules for Allen‑Bradley 1734 Point‑I/O platform, including ILX34‑MBS485 (RS‑485) and ILX34‑MBS232 (RS‑232) for Modbus serial integration.
Product Features
- Configurable as Modbus Master or Modbus Slave for flexible system topologiesProSoft Te…
- Supports both Modbus RTU (CRC‑16) and Modbus ASCII (LRC) protocol modesProSoft Te…
- Long‑distance RS‑485 communication up to 4000 ft (1219 m) for multi‑drop field device networksProSoft Te…
- Configuration fully handled within Studio 5000 / RSLogix 5000; settings stored inside ACD project fileProSoft Te…
- Add‑On Instructions (AOI) and UDT data types for simple ladder‑logic programming
- Rich diagnostic tags available in controller for real‑time port, node and fault status monitoringProSoft Te…
- Supports up to 30 Modbus commands, maximum 36 words per command; total data up to 1000 wordsProSoft Te…
- Serial port can be enabled or disabled via controller ladder logic
- Multi‑color LED indicators for module status, network, TXD and RXD activity
- Compact 1734 Point‑I/O footprint; mounts onto standard 1734‑TB / ‑TBS terminal base (base not included)ProSoft Te…
- UL/cUL Class 1 Div 2, ATEX Zone 2 and CE approvals for hazardous industrial locationsProSoft Te…
Product Parameters
| Item | Value |
|---|---|
| Part Number | ILX34‑MBS485 |
| Physical Interface | RS‑485 half‑duplex / full‑duplex |
| Protocol | Modbus RTU, Modbus ASCII |
| Operation Mode | Modbus Master / Slave selectable |
| Power Supply | 10‑28.8 VDC |
| Point‑bus Current | 75 mA @ 5 VDC |
| Baud Rate Range | 110 ‑ 38400 baud |
| Parity | None, Even, Odd; Stop bits:1 /2; Data bits:7 /8 |
| Modbus Node Address | 1‑247 |
| Mounting | 1734‑TB / 1734‑TBS terminal base (sold separately) |
| Dimensions(H×W×D) | 56 mm × 12 mm ×75.5 mm |
| Weight | 30 g |
| Operating Temperature | -20 °C ~ +55 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Certifications | UL/cUL Class1 Div2, ATEX Cat3 Zone2, CE |
Product Specifications
- Requires compatible 1734 terminal base unit for field wiring connection, base not supplied with module
- Not hot‑swappable; remove backplane power before inserting or removing module
- Diagnostic status and error counters accessible through controller tags for remote troubleshooting
- Supports major Modbus function codes for coils, discrete inputs, holding registers and input registers
- Designed for cabinet‑mount installation; protection class IP20
- Compatible with CompactLogix L1 series controllers and 1734‑AENTR / 1734‑ADAP Point‑I/O adapters
Function
Acts as protocol bridge between Rockwell control backplane and Modbus serial field network. When set as Master, it polls external Modbus slave devices, collects register and coil data and transfers values into controller tags; it also transmits write commands from PLC out to field devices. When set as Slave, it responds to Modbus master requests from external host systems, exposing controller internal data over RS‑485 serial link. All communication parameters and command tables are managed from the PLC programming environment.
Purpose
Integrate legacy Modbus‑RTU/ASCII third‑party hardware (variable‑frequency drives, temperature controllers, flow meters, power monitors) into Allen‑Bradley CompactLogix and Point‑I/O control systems, avoiding costly hardware replacement during system upgrade and retrofit projects.
Application Fields
Discrete manufacturing production lines, water & wastewater treatment plants, oil & gas auxiliary control, power‑plant auxiliary systems, building energy management, food & beverage processing, factory automation retrofitting, SCADA field‑device interface applications.Image search keyword: ProSoft Technology ILX34‑MBS485 Modbus RS‑485 Point‑I/O module
