GE Fanuc IC697CPU781-JD Series 90-70 16MHz CPU 512KB

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The GE Fanuc / Emerson IC697CPU781-JD is a single-slot 32-bit central processing module for GE Series 90-70 programmable logic controllers. Running a 16 MHz 80386DX processor with 512 KB of battery-backed CMOS memory, it manages complex math algorithms, continuous process loops, and thousands of discrete and analog I/O points across VMEbus architectures.

Because the entire Series 90-70 platform has been officially discontinued by the OEM, maintaining an IC697CPU781-JD as New Surplus on-site is a mandatory risk-mitigation strategy. Used or refurbished CPU modules frequently suffer from degraded RAM backup circuits, micro-fissures in solder joints, and dried-out board-level capacitors that cause intermittent logic drops or memory corruption. Sourcing New Surplus inventory protects your facility from catastrophic, multi-day system outages while preserving capital before undertaking a full DCS migration.

IC697CPU781-JD

IC697CPU781-JD

Installation & Configuration Guide

1.Pre-Installation (Prep & Safety):Safety measures and system setup validation.

Isolate all rack power sources using standard LOTO protocols. Put on a grounded ESD wrist strap connected to cabinet earth ground before opening anti-static packaging. Document current DIP switch bank settings, memory jumper positions, and ensure a recent copy of the PLC project logic file (.SNP or .PME) is saved on your terminal.

2.Removal:Safe extraction techniques for VME CPU cards.

Disconnect the serial programming cable from the 9-pin SNP port. Loosen the top and bottom captive retaining screws holding the CPU card to the VME chassis frame. Unlatch the upper and lower ejection levers simultaneously, then pull the card straight out along the guide rails to avoid putting side stress on the fragile backplane pins.

3.Installation (Clone & Seat):Hardware mounting and physical verification.

Match the hardware jumpers and DIP switch configuration on the new IC697CPU781-JD to the original unit. Connect the memory retention lithium battery to the front header. Align the CPU card edges with Slot 1 guide rails in the Series 90-70 backplane, push rearward until both levers snap closed, and hand-tighten the retaining screws.

4.Power-On & Testing:System initialization and functional checks.

Apply system power and observe the boot sequence. Verify that the MODULE OK LED turns solid green and the BATTERY light remains off. Connect via Proficy Machine Edition or Logicmaster 90-70 using an IC690USB901 converter, clear CPU diagnostic tables, upload the logic application, and place the processor into RUN mode.

Firmware/Software Versions & Upgrade Notes

• Software Compatibility: Fully supported by Logicmaster 90-70 (V5.0 and higher), Control 90-70, and Proficy Machine Edition (PME).
• Memory Protection Jumpers: Ensure the memory write-protect jumper (JP1) is properly configured before attempting a program download. If set to “PROTECT,” logic writes will fail with a memory privilege fault error.
• Revision Delta (-JD): The “-JD” hardware revision incorporates key board-level components resistant to thermal aging. Avoid downgrading firmware below Revision 6.00, as older operating systems lack full address bus timing optimization for the -JD memory controller.

Frequently Asked Questions (FAQ)

Is the IC697CPU781-JD completely new and unused?

Yes. This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Factory packaging is opened solely for visual inspection, pin check, and anti-counterfeit serial verification.

Why is buying a New Surplus CPU better than buying a refurbished unit?

Refurbished CPU modules frequently suffer from thermal stress and aged board components. A unexpected memory loss or processor halt on a main CPU card can cause a full plant shut down. Purchasing a verified New Surplus CPU guarantees factory-fresh component integrity, steady voltage regulation, and absolute operational peace of mind.

What happens if the front lithium battery on the IC697CPU781-JD dies?

The onboard RAM requires battery power to retain user logic and system parameters when main backplane power is turned off. If the battery voltage drops below threshold, the BATTERY LED lights up. If power is lost while the battery is dead, the program memory will clear, requiring a reload from software or EEPROM.

Can the IC697CPU781-JD be hot-swapped while the rack is powered?

No. The Series 90-70 VME backplane does not support Removal and Insertion Under Power (RIUP). Pulling or inserting the central CPU card while power is applied will cause electrical arcing across the VME pins, corrupt memory, and can permanently destroy the processor or adjacent I/O modules.

How does this CPU fit into a critical spare parts buffer strategy?

As the primary logic engine of a Series 90-70 system, the is classified as a Class A Critical Spare. Keeping 1 to 2 units on-site acts as an insurance policy against lead-time delays, allowing immediate swap-outs to keep production running without waiting weeks for emergency vendor sourcing.

What warranty coverage is included with this New Surplus module?

We support this CPU with a comprehensive 1-year functional replacement warranty. If any hardware failure, memory address fault, or serial port error occurs under standard operating conditions within 12 months, we will immediately supply a direct replacement module from our stock.