PRODUCT INFORMATION
Product Overview
The General Electric IC697MEM717 is a CMOS expansion RAM module for the Series 90-70 control platform. This module provides a total memory capacity of 256 KB for user program and data storage. Engineers can configure the active memory space down to 64 KB depending on specific system requirements. It mounts directly onto supported host modules without occupying an additional backplane slot.
The unit operates with host controllers including CPU 771, CPU 772, and compatible PCM modules. High-speed CMOS architecture delivers access times typically under 200 nanoseconds. Memory retention relies on battery backing supplied through the host CPU or PCM hardware. A CPU checksum routine provides error checking to protect stored logic during execution. Power comes from the backplane at 5 VDC regulated, drawing a maximum of 0.5 A.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Weight | 0.19 lbs (0.09 kg) |
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| Memory Capacity | 256 KB |
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| Minimum Configurable Capacity | 64 KB |
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| Compatibility | CPU 771, CPU 772, PCM modules |
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| Installation Requirement | No additional slot required |
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| Retention Method | Battery-backed on CPU or PCM |
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| Error Checking | CPU checksum routine |
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| Data Storage | Configurable for program and data |
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| Access Speed | High-speed CMOS access (typical <200 ns) |
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| Bus Interface | Direct expansion via Series 90-70 backplane |
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| Voltage Requirement | 5 VDC regulated supply from backplane |
|---|
| Current Consumption | 0.5 A max at 5 VDC |
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TECHNICAL INFORMATION
Features
- Total memory capacity of 256 KB configurable down to 64 KB
- High-speed CMOS memory access with typical speeds under 200 nanoseconds
- Battery-backed data retention supported directly via the host CPU or PCM
- Zero-slot physical design mounting directly to host controller hardware
- Internal CPU checksum routine for stored data error checking
- Direct expansion interface to the Series 90-70 backplane
TECHNICAL INFORMATION
Applications
- Expanding user logic and data storage on Series 90-70 CPU 771 modules
- Increasing memory allocation for Series 90-70 CPU 772 controllers
- Supplemental memory storage for compatible Series 90-70 PCM modules
TECHNICAL INFORMATION
Connections / Interfaces
- Direct expansion bus interface to the Series 90-70 backplane
- Direct plug-in header for host CPU and PCM module connection
TECHNICAL INFORMATION
Installation Guidelines
- Align and mate the module directly to the expansion port on the CPU or PCM.
- Verify that the host module is de-energized before mounting the expansion memory.
- Installation does not occupy any extra slots in the Series 90-70 rack.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure operating memory capacity between 64 KB and 256 KB using standard system software.
- Ensure host CPU checksum routines are active to confirm data integrity.
TECHNICAL INFORMATION
Compatibility
- Series 90-70 CPU 771
- Series 90-70 CPU 772
- Compatible Series 90-70 PCM modules
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSSeries 90-70 CPU 771 Series 90-70 CPU 772 Compatible Series 90-70 PCM modules
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the memory capacity of the IC697MEM717?
The module provides 256 KB total memory, which can be configured down to 64 KB.
Does the IC697MEM717 occupy a separate backplane slot?
No, it mounts directly to compatible CPU or PCM modules without requiring an extra slot.
How does the IC697MEM717 retain memory during a power outage?
The module uses the battery backup circuit of the host CPU or PCM module.
Which host modules work with the IC697MEM717?
It is compatible with Series 90-70 CPU 771, CPU 772, and compatible PCM modules.
