ABB DSAX110 57120001-PC Retrofit-Ready Analog I/O for INFI 90 Control Systems
The ABB DSAX110 (part number 57120001-PC) is a high-density analog input/output module engineered for the ABB INFI 90 Distributed Control System platform. As legacy INFI 90 installations continue to operate across power generation, chemical processing, and pulp-and-paper facilities worldwide, the DSAX110 remains a critical component for both ongoing maintenance and structured system modernization. Whether you are replacing a failed module on an active production line or executing a phased migration toward the ABB Symphony Plus architecture, the DSAX110 provides the electrical and functional compatibility required to maintain control continuity without rewriting existing application logic.
Our inventory of the DSAX110 57120001-PC is sourced from verified industrial channels, subjected to functional bench testing prior to shipment, and covered by a 12-month warranty. Each unit is inspected for backplane connector integrity, analog channel calibration, and communication bus response before dispatch. We maintain buffer stock to support urgent replacement scenarios where extended lead times from the original manufacturer are not acceptable.
Upgrade Compatibility Table
| Parameter | Details |
|---|---|
| SKU / Part Number | DSAX110 / 57120001-PC |
| Platform Compatibility | ABB INFI 90 DCS (Bailey Controls heritage) |
| Module Function | Analog Input/Output — multi-channel signal conditioning |
| Backplane Interface | INFI 90 standard module bus connector; direct slot replacement |
| Installation Requirement | Compatible with INFI 90 standard rack/chassis; no hardware modification required for direct swap |
| Communication Compatibility | INFI-NET / Module Bus; compatible with IMMFP12, IMCPM05 controller modules |
| Replacement Recommendation | Direct drop-in for failed or end-of-life DSAX110 units; verify module address jumper settings before installation |
| Commissioning Notes | Confirm analog channel scaling in INFI 90 engineering workstation; validate loop current/voltage range per P&ID |
| Warranty | 12 months from date of shipment; covers functional failure under normal operating conditions |
| Pre-Shipment Testing | Full functional test performed on each unit; analog channel calibration verified |
Retrofit Planning for Existing Automation Systems
Retrofitting an INFI 90 system requires careful coordination across multiple hardware layers. The DSAX110 occupies a defined slot within the INFI 90 rack, and its replacement must account for the physical backplane pinout, the module address configuration set via onboard jumpers or DIP switches, and the analog signal wiring at the field terminal assembly. Before removing the existing module, engineers should document the current module address, record all analog channel assignments from the INFI 90 engineering workstation, and photograph the terminal wiring to ensure accurate reconnection.
In systems where the DSAX110 interfaces with an IMMFP12 Multi-Function Processor or an IMCPM05 Control Processor Module, the replacement module must be recognized by the controller during the next scan cycle. In most INFI 90 configurations, a cold-swap procedure — powering down the affected rack section, replacing the module, and restoring power — is sufficient for the controller to re-establish communication. However, in systems running continuous process loops, coordination with the control room operator is essential to place affected loops in manual mode before the swap.
The INFI 90 rack itself — typically an IMRACK or equivalent chassis — must be inspected for backplane connector wear, particularly in installations that have seen multiple module replacements over the years. A damaged backplane connector can cause intermittent analog signal errors that are difficult to distinguish from module failure. Alongside the DSAX110, it is common to audit adjacent modules such as the DSMX110 multiplexer module, the DSAI110 analog input module, and the DSAO110 analog output module to identify any other components approaching end-of-life.
Power supply integrity is another critical factor. The INFI 90 platform relies on dedicated DC power supplies — such as the DSPSU01 or equivalent power supply units — to maintain stable voltage rails for analog signal processing. A degraded power supply can introduce noise into analog channels, causing erratic readings that may be misattributed to module failure. Verifying power supply output voltage and ripple before and after the DSAX110 replacement is a recommended step in any structured retrofit procedure.
For facilities planning a longer-term migration from INFI 90 to ABB Symphony Plus, the DSAX110 replacement phase is often the first step in a multi-year modernization roadmap. Symphony Plus components such as the S+ Operations HMI and the AC 800M controller platform offer modern Ethernet-based communication and IEC 61131-3 programming environments, but the transition requires careful mapping of existing INFI-NET function blocks to their Symphony Plus equivalents. During the transition period, maintaining a reliable inventory of INFI 90 spare parts — including the DSAX110, IMMFP12, and NTAI05 analog input termination units — is essential to prevent unplanned downtime.
Communication module integrity should also be verified during any DSAX110 retrofit. The INFI 90 Module Bus relies on modules such as the IMCIS02 Communication Interface or the IMDSO14 digital output module operating correctly within the same rack. A module bus fault caused by a failing neighbor module can mask the true source of analog signal errors and lead to unnecessary replacement of otherwise functional DSAX110 units.
Downtime Control During System Migration
Minimizing downtime during an INFI 90 analog module replacement requires a structured pre-outage preparation protocol. The most effective approach is to complete all documentation, spare part verification, and tool staging before the maintenance window begins. This includes confirming that the replacement DSAX110 57120001-PC has been bench-tested, that the module address configuration matches the unit being replaced, and that all field loop drawings are available at the work site.
Where process conditions permit, placing affected analog loops in manual control mode at the INFI 90 operator station — or at the local field instrument — before the module swap eliminates the risk of process upsets caused by signal loss during the replacement. For critical loops such as flow control, pressure regulation, or temperature management, a pre-agreed manual setpoint should be established with the process operator before work begins.
After installing the replacement DSAX110, the commissioning sequence should include verifying that the module appears correctly in the INFI 90 engineering workstation, confirming that all analog channels are reading within expected ranges, and performing a loop check on each connected field instrument before returning loops to automatic control. In systems where the INFI 90 is connected to a higher-level SCADA or historian platform via an OPC server or INFI-NET gateway, verifying that data tags are updating correctly after the module replacement is an important final step before closing out the maintenance work order.
Our team can provide pre-shipment configuration documentation and module address verification support to reduce on-site commissioning time. For urgent replacement scenarios, expedited shipping is available to minimize the gap between module failure and system restoration.
Retrofit Support FAQ
Q: Is the DSAX110 57120001-PC a direct replacement for all DSAX110 variants in the INFI 90 system?
A: The 57120001-PC is the standard production part number for the DSAX110 analog I/O module and is compatible with standard INFI 90 rack installations. If your existing module carries a different suffix or revision marking, please share the full part number with our technical team before ordering to confirm compatibility.
Q: What commissioning steps are required after installing the replacement DSAX110?
A: After physical installation, verify the module address jumper settings match the original unit, confirm the module is recognized by the INFI 90 controller (IMMFP12 or IMCPM05), check all analog channel readings against known process values, and perform a loop check on each connected field instrument. Return all affected loops from manual to automatic control only after signal integrity is confirmed.
Q: How is the DSAX110 wired to field instruments, and does replacement require rewiring?
A: The DSAX110 connects to field instruments via the INFI 90 field terminal assembly (such as the NTAI05 or equivalent termination unit). In a standard replacement, field wiring remains connected to the termination unit and does not need to be disturbed. Only the module itself is swapped at the backplane, significantly reducing rewiring risk and installation time.
Q: What does the 12-month warranty cover, and what is the return process?
A: The 12-month warranty covers functional failure of the DSAX110 under normal operating conditions, including analog channel failure, backplane communication faults, and power-related module damage attributable to manufacturing defects. Physical damage caused by incorrect installation, overvoltage, or environmental factors is excluded. To initiate a warranty claim, contact our technical support team with the order reference and a description of the observed fault. Replacement or repair will be arranged promptly to minimize system downtime.
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