A-B 1762-IF2OF2 Analog Combo Module

The Allen-Bradley 1762-IF2OF2 is a MicroLogix 1200 series 4-point analog combo I/O module, providing both analog inputs and analog outputs in one module.

Product Information

• Brand: Allen-Bradley (Rockwell Automation)
• Series: MicroLogix 1200 Expansion I/O (1762 series)
• Part Number: 1762-IF2OF2
• Type: Analog Combo Module (Input + Output)
• Channels:
  • 2 analog inputs
  • 2 analog outputs
• Signal types:
  • Voltage: 0–10 V DC
  • Current: 4–20 mA
• Resolution: 12-bit A/D and D/A conversion
• Mounting: DIN rail, side-mounted expansion to MicroLogix PLC

Function (Simple Explanation)

This module is a two-way analog interface:

• Reads signals from field devices (inputs)
• Sends analog control signals back out (outputs)

Example:

• Pressure sensor → PLC (input channel)
• PLC → control valve (output channel)

So it works as both:

• Data acquisition module
• Analog control output module

Key Features

• 2 analog input channels (AI)
• 2 analog output channels (AO)
• Supports voltage and current signals
• Compact “all-in-one” analog solution
• High compatibility with MicroLogix 1200 systems
• Built-in signal isolation and diagnostics
• Fast update cycle suitable for process control

Typical Applications

• Small process control systems
• Pump and valve control loops
• Temperature / pressure monitoring systems
• HVAC control systems
• Simple automation machines
• OEM equipment with limited I/O space

System Role

Field devices
→ analog signals
→ 1762-IF2OF2 module
→ MicroLogix PLC CPU
→ logic control
→ analog outputs back to actuators

It reduces the need for separate input/output modules.

Advantages

• Saves PLC slot space (combines AI + AO)
• Lower cost than separate modules
• Easy wiring and compact design
• Good for small to medium automation systems
• Compatible with standard industrial 4–20 mA / 0–10 V devices

Precautions

• Only 2 inputs + 2 outputs (limited capacity)
• Requires correct scaling in PLC program
• Sensitive to electrical noise → use shielded cable
• Not suitable for high-speed control loops
• Must ensure correct configuration (V vs mA per channel)