GE IC693ACC302B
GE IC693ACC302B
GE IC693ACC302B
GE IC693ACC302B
GE IC693ACC302B

GE IC693ACC302B | 15Ah Auxiliary Battery Module – Revision B – Field Service Guide

  • Model: IC693ACC302B (Revision B)
  • Product Series: GE Fanuc Series 90-30 / Series 90-70 / PACSystems
  • Hardware Type: External High-Capacity Auxiliary Battery Module (Revision B)
  • Key Feature: 15Ah capacity provides up to 75 months of RAM memory backup for most CPUs; 15 months for CPU374
  • Primary Field Use: Extended memory retention for critical applications requiring long-term power-down protection without program loss
  • Environmental Rating: 0°C to +60°C operating temperature; 7-year shelf life
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Part number: GE IC693ACC302B
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Description

Hard-Numbers: Technical Specifications

  • Battery Chemistry: Lithium (primary, non-rechargeable)
  • Output Voltage: 3 VDC
  • Battery Capacity: 15.0 Amp-hours (15 Ah)
  • Physical Dimensions: 5.713″ × 2.559″ × 1.571″ (145.1 × 65.0 × 39.9 mm)
  • Weight: 232 grams (0.51 lbs / 0.69 lbs per alternate source)
  • Case Material: Black, flame-retardant ABS plastic
  • Connection: 2.0′ (0.6 meter) twisted red/black 24 AWG lead with female 2-pin connector
  • Mounting: Panel mount (four #8-32 × ½” flat head machine screws)
  • Operating Temperature Range: 0°C to +60°C (+32°F to +140°F)
  • Shelf Life: 7 years at 20°C
  • Protection: Built-in 1 Amp fuse (non-replaceable, sealed inside)
  • Compatibility: All IC693 power supplies and IC697 CPUs; PACSystems battery connectors
  • Memory Backup Life (Power-Down Conditions):
    • IC693 CPUs 311–364: 75 months (~6.25 years)
    • All existing IC697 CPUs: 75 months (~6.25 years)
    • IC693 CPU374: 15 months (~1.25 years)
  • Lithium Content: 5.1 grams (3 cells @ 1.7 grams/cell)
  • Status: Discontinued/Obsolete (replaced by IC695ACC302 for PACSystems)
  • Revision: B (IC693ACC302B, IC693ACC302-B, Series B, Rev B)
    GE IC693ACC302B

    GE IC693ACC302B

The Real-World Problem It Solves

The IC693ACC302B is Revision B of the auxiliary battery module, sharing identical electrical and mechanical specifications with base IC693ACC302 and Revision A. It addresses the same critical limitation: standard IC693ACC301 internal batteries last only 1–2 years, while many industrial applications require multi-year memory retention during extended shutdowns, seasonal operations, or infrequent maintenance intervals.
Where you’ll typically find it:
  • Seasonal facilities: Sugar mills, agricultural processing plants, and amusement parks that shut down for months annually.
  • Backup power systems: Emergency generators and UPS systems where PLCs may remain offline for extended service intervals.
  • Remote installations: Oil and gas wellheads, water treatment facilities, and solar installations where maintenance access is infrequent.
  • Critical control infrastructure: Applications where program loss is unacceptable and battery replacement logistics are challenging.
Bottom line: Revision B delivers identical performance to base IC693ACC302 and Revision A. All three variants (base, A, B) are functionally interchangeable in the field.

Hardware Architecture & Under-the-Hood Logic

The IC693ACC302B is Revision B of the auxiliary battery module. Like Revision A, it shares identical electrical and mechanical specifications with the base IC693ACC302. Revision differences relate only to manufacturing tolerances, component sourcing, labeling revisions, or minor internal changes—not functional performance.
  1. Battery Configuration:
    • Contains three lithium-thionyl chloride cells in series/parallel configuration delivering 3 VDC at 15 Ah.
    • Primary (non-rechargeable) chemistry optimized for low self-discharge and long shelf life.
    • Lithium content: 5.1 grams (3 cells @ 1.7 grams/cell)—same as base model and Revision A.
  2. Connection and Installation:
    • External panel mount via four #8-32 × ½” flat head machine screws.
    • 0.6-meter (24″) twisted red/black 24 AWG cable with female 2-pin connector.
    • IC693 systems: connect to power supply module battery connector; route through bottom of battery compartment.
    • IC697 systems: connect directly to CPU module battery connector; route out bottom of CPU cover.
    • Critical: Remove internal IC693ACC301 standard battery when using auxiliary module.
  3. Protection Circuitry:
    • Internal 1 Amp fuse protects against short-circuit or severe overload—same as base model and Revision A.
    • Fuse is sealed inside and not user-serviceable—if blown, entire unit requires replacement.
    • No active voltage regulation or low-battery monitoring; provides direct 3 VDC to CPU RAM backup circuit.
  4. Memory Backup Timing:
    • Identical to base IC693ACC302 and Revision A:
      • CPU311–364 and IC697 CPUs: 75 months
      • CPU374: 15 months
    • Timing assumes 20°C ambient temperature; elevated temperatures reduce capacity proportionally.
  5. No Low-Battery Indication:
    • Does not provide reliable low-battery warnings to the CPU—same limitation as base model and Revision A.
    • User logic should not rely on battery status bits.
    • Replacement must be scheduled based on date codes and shelf-life tracking.
      GE IC693ACC302B

      GE IC693ACC302B

Field Service Pitfalls: What Rookies Get Wrong

Assuming Revision B has different performance specs
Rookies treat IC693ACC302B as an upgraded model, expecting enhanced backup time, different voltage, or improved reliability compared to Revision A or base model. They search for separate datasheets or refuse to mix Revision B with earlier revisions in the same plant.
  • Field Rule: IC693ACC302B is functionally identical to IC693ACC302 and IC693ACC302A. Use the same installation procedures, backup time expectations, and maintenance schedules. All three variants (base, A, B) are interchangeable for all practical field purposes.
Forgetting to remove the internal battery
Same rookie error as base model and Revision A: installing IC693ACC302B without removing the internal IC693ACC301. Both batteries connected causes unpredictable behavior.
  • Field Rule: Always remove the internal IC693ACC301 battery from the power supply compartment before connecting any IC693ACC302 variant (including Revision B).
Relying on the BATT LED for low-battery warning
Revision B shares the same limitation: no reliable low-battery indication to the CPU. Rookies monitor BATT LED or Fault Table bits, then discover the battery is dead during a planned shutdown.
  • Field Rule: IC693ACC302B provides no low-battery alarm. Track installation dates and replace every 5–6 years for CPU311–364, or every 12–14 months for CPU374. Use a multimeter to verify voltage (3.0–3.3 VDC) during preventive maintenance.
Ignoring the 7-year shelf life
The Revision B battery has the same 7-year shelf life. Rookies install batteries that have been in storage for 8–10 years, expecting full backup time.
  • Field Rule: Check the date code on the product label (three digits: first digit = year in 21st century, last two = fiscal week). Do not install any IC693ACC302 variant that has exceeded 7 years from manufacture.
Improper mounting and cable routing
Same mounting and cable routing pitfalls apply to Revision B. Rookies mount the module without securing it properly or pinch the cable when closing covers.
  • Field Rule: Use all four #8-32 × ½” flat head screws with proper torque. Route the cable through designated slots without sharp bends. Verify cable clearance before closing compartment covers.
Blowing the internal fuse during installation
Revision B has the same internal 1 Amp fuse as the base model and Revision A. Rookies accidentally short the connector pins or reverse polarity, then assume the new battery is defective.
  • Field Rule: Turn off PLC power before connecting the battery. Verify connector polarity (red = positive, black = negative). If fuse opens (no voltage at connector pins), the entire unit must be replaced.
Not testing after installation
Rookies install Revision B and assume it works—never verifying actual backup voltage or performing a controlled power-down test.
  • Field Rule: After installation, verify voltage at connector pins (3.0–3.3 VDC). Perform a controlled power-down test: remove AC power for 10–15 minutes, restore power, and confirm program and retentive data are intact.
Using IC693ACC302B with CPU374 without understanding limitations
Revision B has the same CPU374 limitation: only 15 months of backup. Rookies expect 75 months, then face program loss after 1 year of shutdown.
  • Field Rule: For CPU374 applications requiring more than 15 months of backup, consider upgrading to a PACSystems controller with IC695ACC302 Smart Battery Module, or implement Flash memory backup for long-term program retention.

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

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