ABB AX722F 3BDH000377R0001 Analog Input/Output Module

Description

3. Key Technical Specifications

4. Product Introduction & Supply Chain Strategy

The ABB AX722F (3BDH000377R0001) is a versatile, high-density combined analog I/O module engineered for the ABB Freelance distributed control system (DCS) and S700 I/O clusters. Featuring 8 individually configurable analog inputs and 8 analog outputs on a single card, the AX722F allows process systems to interface with both transmitters (for temperature, pressure, and flow) and control actuators (such as valves and variable speed drives) without requiring separate, dedicated cards. This combined architecture maximizes physical rail space and lowers the cost-per-channel in dense control enclosures.

From an operations and inventory planning perspective, keeping a New Surplus AX722F on hand is a smart strategic move for maintaining plant reliability. Because combined cards handle both feedback loops and control commands simultaneously, a single fault on an aged module can disrupt multiple process loops at once. Opting for refurbished or repaired boards is risky because they often have degraded analog reference chips, leading to measurement drift or unstable control signals. Our verified New Surplus units ensure original factory calibration and loop accuracy, offering a reliable drop-in replacement that avoids the long wait times of special factory orders.

AX722F 3BDH000377R0001

AX722F 3BDH000377R0001

5. Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Completely power down the 24 V DC supply feeding the target S700 terminal base unit (TU715F/TU716F).
2. Attach a grounded ESD wrist strap to an unpainted point on the system chassis before unboxing the new card.
3. Verify that the channel wiring configurations on the existing terminal block match the signal types (current, voltage, or RTD) assigned to the replacement module.

Stage 2: Removal

1. Loosen any integrated module retaining clips on the terminal unit.
2. Pull the AX722F module straight out from the terminal unit base, ensuring you do not bend the lateral bus expansion pins.
3. Immediately place the removed module into an ESD-safe protective shielding pouch.

Stage 3: Installation (Clone & Seat)

1. Confirm that the mechanical coding keys on the terminal base are set correctly for the AX722F to prevent inserting the wrong module type.
2. Align the module with the guide channels of the terminal base unit.
3. Slide the card firmly into place until the locking tabs click, establishing a secure electrical connection to the local Modulebus.

Stage 4: Power-On & Testing

1. Re-apply the local 24 V DC module power supply.
2. Monitor the diagnostic LED indicators. The green PWR LED should remain steady, and the red ERR LED must be dark.
3. Use the Freelance engineering tool (Control Builder F) to confirm successful bus configuration and verify the status of active analog inputs and outputs.

6. Firmware/Software Versions & Upgrade Notes

The AX722F 3BDH000377R0001 works with specific software versions in the Freelance Control Builder F utility. When replacing an older module hardware index (such as revision A1 or A2) with a newer revision (such as A4 shown on our label), check your active GSD or profile definitions. In legacy configurations, you may need to update the hardware definition files so the system correctly recognizes the newer revision’s diagnostic features.

Do not try to force-downgrade the module’s onboard microcode to match old system software. If your system runs on older, unpatched Freelance software, contact our technical team before installation to make sure the replacement unit has compatible hardware and firmware revisions.

7. Frequently Asked Questions (FAQ)

Can I mix voltage and current signals on the same AX722F module?

Yes. The 8 analog inputs and 8 analog outputs are individually configurable in your control software. You can run Pt100 RTDs on channels 1 and 2, 4-20 mA current loops on channels 3 and 4, and 0-10 V signals on the remaining channels without needing external conversion modules.

Why should we choose New Surplus over a refurbished card?

Combined I/O modules are packed with delicate multiplexing and conversion circuitry. Refurbished units are prone to heat wear from long-term use, which can degrade the precision of their internal analog-to-digital converters (ADCs). Buying a New Surplus module gives you factory-level accuracy, zero component wear, and a reliable operational lifespan.

Does this module require a separate terminal unit?

Yes. The AX722F must be plugged into an S700 terminal unit, such as the TU715F (with screw terminals) or the TU716F (with spring terminals). The terminal units handle the field wiring, allowing you to easily swap the active electronics module without disconnecting any wires.

Is the AX722F module hot-swappable during system operation?

The AX722F can be swapped under power if the surrounding S700 system configuration allows it. However, because this module combines 8 inputs and 8 outputs, pulling it will instantly cut off all 16 process loops. Make sure to put all affected field equipment into safe manual modes before removing the module.

What warranty coverage do you provide with this item?

Every New Surplus AX722F 3BDH000377R0001 module comes with our full 12-month replacement warranty. This warranty starts on the day your team receives the shipment, giving you reliable protection and peace of mind.

The AX722F delivers 8 analog inputs and 8 analog outputs with 12-bit plus sign resolution in a single compact slot. It features individually configurable channels for voltage, current, and RTD signals to simplify your system design and reduce spare parts complexity.