Description
Product Introduction & Engineering Value
Many process plants eventually run out of cabinet space before they run out of control capacity. The ABB AX722F addresses that problem by combining analog inputs and outputs within a single S700 I/O module, reducing hardware count without sacrificing measurement flexibility.
Designed for ABB Freelance DCS platforms, the module supports both direct I/O and PROFIBUS remote I/O architectures. It is particularly useful during plant expansions where existing control strategies remain unchanged but additional field devices must be integrated.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | AX722F |
| Article Number | 3BDH000377R0001 |
| Product Type | Analog Input/Output Module |
| Series | S700 I/O |
| Total Channels | 16 |
| Analog Inputs | 8 configurable AI |
| Analog Outputs | 8 AO (4 configurable for voltage/current, 4 voltage outputs) |
| Input Types | ±10 V, 0–20 mA, 4–20 mA, Pt100, 24 VDC |
| Output Types | ±10 V, 0–20 mA, 4–20 mA |
| Resolution | 12-bit + Sign |
| Operating Voltage | 24 VDC |
| Power Consumption | Approximately 5 W |
| Communication | Direct I/O or PROFIBUS Remote I/O |
| Compatible Controllers | AC 700F, AC 900F |
| Required Terminal Unit | TU715F or TU716F |
Field Application & The “Trench” Experience
During a refinery turnaround, an engineering team needed to add several pressure transmitters and control valves to an existing ABB Freelance installation without expanding the cabinet. Available rack space was limited to a single slot.
Replacing separate AI and AO modules with one AX722F freed valuable space while preserving the existing control logic. After channel configuration and signal verification, loop commissioning finished ahead of schedule and avoided modifications to the cabinet layout.
Typical applications include:
- Catalytic cracking unit pressure and valve control
- Boiler drum level monitoring with analog transmitters
- Chemical reactor temperature measurement using Pt100 sensors
- AX722F 3BDH000377R0001
- AX722F 3BDH000377R0001
Transparency SOP: QA & Testing
Every New Surplus or professionally refurbished AX722F module is processed through a documented inspection procedure.
- Hardware identification and article number verification.
- Visual inspection for damaged connectors, PCB contamination, and mechanical defects.
- Functional testing using compatible ABB Freelance equipment.
- Analog input calibration verification across voltage and current ranges.
- Analog output signal accuracy check.
- Final anti-static packaging with serialized quality documentation.
The Veteran’s Tech Trap Guide
⚠️ Don’t overlook the terminal unit.
The requires TU715F or TU716F. Ordering only the module can delay installation if the correct terminal unit is unavailable.
⚠️ Software compatibility matters.
Older Freelance installations may require Software Version 2013 SP1 RU04 or later for proper support. Verify the controller software before replacing hardware.
PRO TIP:
Label every analog channel before removing the original module. Mixed AI/AO modules simplify cabinet design but make wiring mistakes more likely during shutdown work.
⚠️ Current versus voltage outputs
Only part of the output channels support configurable current output. Verify the channel assignment during engineering rather than assuming every output is identical.
Dynamic FAQ
Q1. Is the used as local I/O or remote I/O?
It supports both direct I/O for ABB AC700F/AC900F controllers and PROFIBUS Remote I/O installations.
Q2. Which field signals are supported?
The module accepts voltage, current, and Pt100 temperature inputs, while outputs support configurable voltage and current ranges depending on channel assignment.
Q3. Does the module include a terminal unit?
No. The is supplied without the terminal unit. TU715F or TU716F must be ordered separately if required.
Q4. Are New Surplus units genuine ABB products?
Yes. New Surplus inventory consists of unused original ABB hardware that has remained in warehouse storage. Product identification and physical condition are verified before shipment.
Q5. Can this module replace an existing without changing application software?
In many installations, yes. However, firmware version, controller software revision, and channel configuration should always be verified before commissioning to avoid unexpected startup issues.
Q6. What warranty is available?
Warranty terms depend on whether the module is supplied as New Surplus or Refurbished. Each unit is inspected and functionally verified before shipment, and warranty details are provided with the quotation.
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