IC695CPU315-CD | PACSystems RX3i 64 MHz CPU Module

Description

Key Technical Specifications

Product Introduction

The IC695CPU315-CD is a cost-effective yet powerful controller in the PACSystems RX3i lineup, designed for small to medium-scale automation tasks. With a 64 MHz processor and 2 MB of memory, it handles complex logic, PID control, and data collection efficiently without the overhead of larger high-end CPUs.It features an integrated Ethernet switch, allowing daisy-chaining of network devices without an external switch, saving panel space and wiring costs. This unit is a popular migration path for users upgrading from older GE 90-30 series PLCs, offering modern communication capabilities while maintaining familiar programming concepts.

IC695CPU315-CD GE

Installation & Configuration Guide

Preparation (10 min)

• Ensure the control panel power is OFF and locked out (LOTO).
• Verify the backplane slot is empty and clean. Slot 1 is recommended but not mandatory for non-redundant setups.
• Attach an ESD wrist strap to prevent static damage to the CPU components.

Removal (5–10 min)

• Disconnect Ethernet cables and serial wiring. Label connections clearly.
• Release the locking levers at the top and bottom of the module faceplate.
• Slide the module straight out. Avoid twisting, which can damage the 96-pin backplane connector.

Installation (10 min)

• Align the IC695CPU315-CD guide rails with the backplane slot grooves.
• Push firmly until the module seats completely against the backplane. A distinct “click” or solid stop indicates proper seating.
• Engage the locking levers. They must lock securely. If they resist, re-seat the module.
• Reconnect Ethernet and serial cables. Ensure RJ45 clips engage.

Power-On & Test (10 min)

• Restore power to the rack.
• Observe the LED indicators: PWR (Green), OK (Green), RUN (Green).
• The OK LED should turn solid green within 15-20 seconds. Flashing red indicates a fault or missing battery.
• Connect a laptop via USB or Ethernet. Open Proficy Machine Edition.
• Go online. Verify the hardware configuration matches the physical setup and check the firmware version.

Troubleshooting Quick Reference

Dimensions, Mounting & Wiring Notes

• Dimensions: Approx. 12.0 cm (H) × 10.0 cm (W) × 14.5 cm (D) – Standard RX3i single-slot width.
• Mounting: Slides into RX3i universal backplane. Uses integrated locking levers; no screws needed for mounting.
• Terminal Notes: Ethernet ports are standard RJ45. Serial port is a D-Sub 9-pin male (or terminal block depending on specific sub-revision, usually DB9 for CPU315).
• Warning: Do not hot-swap this CPU unless the system is explicitly configured for it (rare for standalone units). Always power down for safety.

IC695CPU315-CD GE

FAQ

Q: What is the difference between CPU315 and CPU320?
A: The CPU315 has a 64 MHz processor and 2 MB memory, while the CPU320 has a 1 GHz processor and 10 MB memory. The 320 is significantly faster and supports larger programs/I/O counts. Choose based on application complexity.Q: Does the “CD” suffix mean it has different ports?
A: No. The “CD” typically refers to a manufacturing revision or packaging configuration. The port layout (2 Ethernet, 1 Serial, 1 USB) remains standard for the CPU315 model.Q: Can I use this CPU for redundancy?
A: No. The IC695CPU315 is a standalone CPU. Redundancy requires specific redundant CPU models (e.g., CPU3xxR) and a redundancy kit.Q: What software is required to program this?
A: You need Proficy Machine Edition (PME). Older software like Logicmaster 90-30 is not compatible with the RX3i architecture.Q: How long does the battery last?
A: Typically 3 to 5 years under normal conditions. The “BAT” LED will illuminate when the voltage drops below a safe threshold, indicating immediate replacement is needed to prevent data loss during power cycles.Q: Is this compatible with 90-30 I/O modules?
A: No. The RX3i (IC695) uses a different backplane and connector than the 90-30 (IC693) series. You must use RX3i-specific I/O modules. Communication between the two systems is possible via Ethernet or Serial.

Quality Transparency Strategy (SOP)

1. Incoming Inspection

• Origin Verification: Validate serial number format against Emerson/GE production records.
• Suffix Check: Confirm “CD” revision label matches expected hardware build.
• Physical Inspection: Check Ethernet ports for bent pins, housing cracks, and backplane connector cleanliness.
• Battery Check: Measure internal battery voltage. Replace if < 3.0V DC.

2. Live Functional Testing

• Test Rack Setup: Installed in an RX3i backplane with dummy I/O modules.
• Boot Sequence: Verify successful boot and “OK” LED stability within 20 seconds.
• Memory Test: Write/Read test patterns across the full 2 MB memory space to verify integrity.
• Comm Stress Test: Run simultaneous Ethernet (SRTP/Modbus) and Serial traffic for 4 hours. Monitor for packet loss.
• Test Report: Document firmware version, battery voltage, and pass/fail status of all ports.

3. Electrical Testing

• Backplane Continuity: Verify continuity on all 96 pins.
• Port Integrity: Test Ethernet link negotiation (10/100 Mbps) and Serial loopback.
• Power Draw: Measure 5V current consumption to ensure it matches specs (~0.8A).

4. Firmware/Revision Verification

• Firmware Version: Document pre-loaded firmware. Update to latest stable version if requested.
• Configuration Backup: Save existing hardware config before wiping.
• Visual Record: High-res photos of the label showing “CPU315-CD” and serial number.

5. Final QC & Packaging

• QC Sign-off: Technician verifies all functional tests.
• ESD Protection: Sealed in anti-static bag with desiccant.
• Packaging: Double-boxed with foam inserts to protect connectors.
• Documentation: Include test report and battery installation date.

Technical Pitfall Guide

• Memory Limitations:
  • Risk: Trying to load a massive program (>1.5 MB) onto the 2 MB CPU315.
  • Result: Download fails or runtime performance degrades severely due to memory fragmentation.
  • Fix: Estimate memory usage early. If >2 MB is needed, upgrade to CPU320 or CPU330.
• Battery Neglect:
  • Scenario: Ignoring the “BAT” LED during routine checks.
  • Consequence: Power flicker causes total program loss.
  • Prevention: Replace batteries proactively every 3 years. Keep a backup of the program on a PC.
• Ethernet Switch Misconfiguration:
  • Detail: The CPU has a built-in switch.
  • Risk: Creating network loops by incorrectly wiring the two ports to the same switch without spanning tree protocol.
  • Fix: Use one port for HMI/SCADA and the other for daisy-chaining remote I/O or drives, or configure VLANs if supported.
• Software Version Mismatch:
  • Scenario: Using an old version of Proficy Machine Edition that doesn’t support the “CD” revision firmware.
  • Result: Connection errors or inability to go online.
  • Fix: Check the firmware version on the CPU label and ensure your PME software has the appropriate support packs installed.
• Backplane Pin Damage:
  • Risk: Forcing the module into the slot.
  • Consequence: Bent pins break communication lines.
  • Protocol: If resistance is felt, stop immediately. Inspect alignment. Never force the levers.