GE IC695ACC400 Replacement for PACSystems RX3i

Product Overview

GE IC695ACC400 Replacement for PACSystems RX3i: Seamless Migration & Upgrade Solution

The GE IC695ACC400 is a rack accessory module designed for the GE PACSystems RX3i control platform — one of the most widely deployed mid-to-high-end PLC architectures in process automation, discrete manufacturing, and critical infrastructure. As legacy RX3i installations age and original GE Fanuc-era components approach end-of-life, plant engineers and procurement teams increasingly require verified replacement and upgrade solutions that preserve existing wiring, rack geometry, and control logic without forcing a full system redesign.

TOPNLMS supplies the IC695ACC400 as a direct drop-in replacement for facilities currently operating GE PACSystems RX3i racks. Whether your site is migrating from an older Series 90-30 or Series 90-70 architecture, consolidating a distributed control cabinet, or simply replacing a failed accessory module to restore system redundancy, this unit is sourced, tested, and shipped ready for installation.

Compatibility Comparison Table

Seamless Upgrade Solutions

Replacing the IC695ACC400 rarely happens in isolation. In a typical PACSystems RX3i retrofit or migration project, the accessory module works in concert with a broader set of components that must be evaluated for compatibility before the system is returned to service.

The CPU module — most commonly an IC695CPE302, IC695CPE305, or IC695CPE400 — governs the overall rack’s processing capacity and communication stack. When upgrading from an older CPU variant, engineers should verify that the firmware revision on the IC695ACC400 aligns with the target CPU’s supported accessory list, as mismatched firmware can prevent the rack from completing its initialization sequence.

Power supply selection is equally critical. The IC695PSA040 (120/240 VAC input) and IC695PSD040 (24 VDC input) are the two most common supply modules paired with RX3i racks in field installations. Sites migrating from Series 90-30 systems that previously used the IC693PWR321 will need to account for the different input voltage range and connector pinout when retrofitting the new power supply into an existing control cabinet.

On the I/O side, analog input modules such as the IC695ALG600 (16-channel analog input) and discrete output modules like the IC695MDL754 (32-point 24 VDC output) are frequently part of the same rack assembly. Their terminal block wiring can often be retained during an IC695ACC400 swap, provided the I/O modules themselves are not being replaced simultaneously — a significant advantage in minimizing downtime during a partial retrofit.

For sites that rely on serial communication to legacy field devices or SCADA systems, the IC695CMM002 serial communications module provides RS-232/RS-485 connectivity within the RX3i rack. This is particularly relevant when migrating from Series 90-30 systems that used SNP or Modbus RTU protocols, as the CMM002 allows the new RX3i rack to maintain backward-compatible communication with existing RTUs, drives, or HMI panels during the transition period.

EtherNet/IP and PROFINET connectivity is typically handled by the IC695ETM001 Ethernet module, which supports SRTP, Modbus TCP, and EtherNet/IP simultaneously. In modernization projects where the plant network is being upgraded alongside the PLC hardware, the ETM001 is often installed in the same rack as the IC695ACC400 to provide the new network interface without requiring a separate communication gateway.

Finally, for applications requiring signal isolation between field wiring and the control rack — common in high-noise industrial environments or when integrating third-party sensors — DIN-rail-mounted signal isolators and terminal distribution modules are typically installed in the same control cabinet. These passive components are independent of the RX3i platform but play an important role in ensuring signal integrity after the rack accessory module is replaced.

Retrofit Guidance FAQ

Q: Can I replace the IC695ACC400 without modifying my existing wiring?
A: In most cases, yes — provided the replacement unit is installed in the same rack slot and the adjacent I/O modules are not being changed. The IC695ACC400 does not carry field wiring directly; wiring terminations are managed by the I/O modules in the rack. Verify that the rack backplane connectors are undamaged before seating the new module.

Q: Do I need to update my Proficy Machine Edition project after replacing this module?
A: Typically no hardware configuration change is required in PME if the replacement unit is the same model and firmware revision. If the firmware revision differs, a hardware configuration update and re-download may be necessary. Always perform a full I/O force test after replacement before returning the system to automatic mode.

Q: Is this module compatible with both AC and DC-powered RX3i racks?
A: Yes. The IC695ACC400 is compatible with RX3i racks powered by either the IC695PSA040 (AC input) or IC695PSD040/IC695PSD140 (DC input) power supply modules. Confirm the rack’s power supply model before ordering to ensure the overall rack assembly meets your site’s power budget.

Q: What communication protocols does the RX3i rack support after this replacement?
A: The communication protocol capability of the rack is determined by the CPU and communication modules installed, not the rack accessory module itself. The IC695ACC400 does not add or remove protocol support. SRTP, Modbus TCP, EtherNet/IP, and serial protocols (via CMM002) remain available as configured in the existing system.

Q: How much physical space does the IC695ACC400 require in the control cabinet?
A: The module occupies a single slot in a standard RX3i rack (IC695CHS007, IC695CHS012, or IC695CHS016). No additional DIN rail space or external mounting is required. Cabinet depth requirements follow standard RX3i rack dimensions.

Q: Can this unit replace a failed module in a running system with minimal downtime?
A: Hot-swap capability depends on the specific rack configuration and CPU firmware. In most standard RX3i configurations, replacing a rack accessory module requires a controlled rack power-down. Plan for a maintenance window and have the replacement unit on-site before initiating the swap to minimize total downtime.

Warranty Assurance

Every IC695ACC400 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes a functional verification check to confirm module identification, backplane interface integrity, and basic power-on self-test completion. Units that do not pass pre-shipment inspection are not dispatched.

In the event of a warranty claim, TOPNLMS provides replacement unit dispatch or full refund processing within the warranty period. Our after-sales response target is one business day for initial acknowledgment of warranty claims submitted via email. Replacement units are shipped from our Xiamen warehouse with the same lead time as standard orders.

For procurement teams requiring documentation, we can provide a test report, packing list, and commercial invoice with each shipment. Long-term supply agreements and blanket purchase orders are supported for MRO and spare parts programs.

Stock is maintained on-hand in Xiamen for immediate dispatch. Standard international shipping lead time is 3–7 business days depending on destination and carrier selection. Express options are available upon request.