A-B 1734-IE8C POINT I O Analog Input Module

Allen-Bradley 1734-IE8C POINT I/O Analog Input Module

 

 

The Allen-Bradley 1734-IE8C is a POINT I/O distributed analog input module used in Rockwell Automation Control systems (via POINT I/O adapter such as 1734-AENTR). It is designed to acquire industrial analog current signals (4–20 mA / 0–20 mA) and convert them into digital data for PLC processing.

Product Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1734-IE8C
• Series: POINT I/O (1734 platform)
• Module Type: Analog Input Module
• Channels: 8 single-ended inputs
• Signal type: Current input (4–20 mA / 0–20 mA)
• Resolution: 16-bit high precision
• Wiring base: 1734-TB / 1734-TBS terminal base required
• Mounting: DIN rail (distributed I/O system)
• System communication: Via POINT I/O adapter (e.g., 1734-AENTR Ethernet/IP)

What it actually does

This module is used to:

• Read process sensor signals such as:
  • pressure transmitters
  • temperature transmitters
  • flow meters
  • level sensors
• Convert analog current signals → PLC digital values
• Send data through POINT I/O network to PLC CPU (ControlLogix / CompactLogix)

System Role (Simple)

Field sensors (4–20 mA devices)
→ 1734-IE8C analog input module (this unit)
→ POINT I/O backplane
→ 1734-AENTR adapter
→ PLC processor (e.g., 1756-L71)

So it acts like a “signal acquisition interface between field instruments and PLC system.”

Key Features

• 8-channel high-density analog input
• Supports standard industrial current signals (4–20 mA)
• 16-bit resolution for high accuracy measurement
• Modular POINT I/O architecture (easy expansion)
• Channel diagnostics (fault detection capability depending configuration)
• Works in distributed control systems via Ethernet/IP adapter

Typical Applications

• Process automation systems
• Chemical plants
• Oil & gas monitoring systems
• Water treatment systems
• Manufacturing lines (pressure/flow monitoring)
• Energy and utility control systems

Advantages

• High precision analog signal acquisition
• Compact modular design (8 channels in one module)
• Easy integration into ControlLogix systems
• Scalable distributed I/O architecture
• Reliable industrial-grade operation

Important Notes

• Not PLC CPU ❌
• Not controller module ❌
• Not power supply ❌
• Not communication adapter ❌
• It is a remote analog input I/O module ✔

Precautions

• Must be used with compatible POINT I/O terminal base (1734-TB series)
• Requires POINT I/O adapter (e.g., 1734-AENTR) to communicate with PLC
• No direct standalone operation
• Proper wiring required for 4–20 mA loop integrity
• Ensure correct module keying in Studio 5000 project