Description
Product Introduction & Engineering Value
Standard PLC inputs perform well for conventional digital signals, but they can miss high-frequency pulses when encoder speeds increase or turbine flowmeters generate rapid pulse trains. That’s exactly where the GE IC693APU300 fits into a control system.
Designed for the Series 90-30 PLC, this dedicated High-Speed Counter module performs pulse processing internally instead of relying solely on CPU scan time. The result is more accurate counting, improved response to encoder feedback, and dependable operation in applications where timing accuracy directly affects production.
Technical Specifications
Manufacturer: GE Fanuc (Emerson)
Series: Series 90-30
Module Type: High-Speed Counter (HSC)
Rack Occupancy: Single-slot specialty module
Maximum Counting Frequency: Up to 80 kHz
Logic Inputs: 12 positive-logic inputs
Logic Outputs: 4 positive-logic outputs
Input Voltage: 5 VDC or 10–30 VDC positive logic
Backplane Power: 5 VDC
Current Consumption: Approximately 250 mA @ 5 VDC
Counter Modes:
- Up Count
- Down Count
- Up/Down
- Differential Counting
- Configurable as 1, 2, or 4 counters depending on the application
Configuration Software: Proficy Machine Edition, VersaPro, Logicmaster 90, with many parameters configurable directly from the application program. No hardware DIP switches are required.
IC693APU300
IC693APU300
Field Application & The “Trench” Experience
A packaging plant experienced intermittent carton length errors on a high-speed conveyor. The PLC logic appeared correct, and the encoder tested within specification. After monitoring pulse activity, maintenance engineers discovered that the standard digital input scan could not consistently capture the encoder pulses during rapid acceleration.
Replacing the standard input solution with an IC693APU300 allowed pulse counting to occur directly within the module. Encoder counts immediately stabilized, product positioning returned to specification, and the production line completed the shift without additional mechanical adjustments.
Typical application scenarios include:
- Turbine flowmeter pulse accumulation in custody transfer systems.
- Rotary encoder feedback for indexing conveyors and palletizers.
- High-speed cut-to-length machines using incremental encoder feedback.
Transparency SOP: QA & Testing
Every New Surplus or Refurbished IC693APU300 is evaluated through a documented verification process before shipment.
- ✔ Confirm part number, hardware revision, and serial identification.
- ✔ Inspect PCB assemblies, connectors, terminal blocks, and enclosure for physical damage.
- ✔ Install the module in a Series 90-30 test rack.
- ✔ Verify LED operation, configuration status, and CPU communication.
- ✔ Simulate high-frequency pulse inputs across multiple counter modes.
- ✔ Test discrete outputs and confirm proper response to preset count conditions.
- ✔ Package the module using ESD-safe materials with impact protection for transport.
The Veteran’s Tech Trap Guide
⚠️ Don’t Assume Standard PLC Inputs Can Replace an HSC
An encoder producing tens of thousands of pulses per second can easily exceed normal PLC scan capability. If count accuracy matters, use the dedicated High-Speed Counter instead of conventional digital inputs.
⚠️ Use Shielded Encoder Cables
Electrical noise from VFDs and large motors frequently causes false counts. Shielded signal cables and proper grounding are recommended for the IC693APU300 installation.
PRO TIP: Before replacing the module, compare the encoder output with an oscilloscope. Many “counter failures” are actually caused by weak encoder signals or loose terminal connections rather than a defective HSC module.
⚠️ Verify Counter Configuration
The module can operate as one, two, or four counters. Loading an incorrect hardware configuration can produce unexpected count behavior even when the hardware is functioning normally.
Dynamic FAQ
Q1. What is the primary purpose of the IC693APU300?
It is a dedicated High-Speed Counter that accurately processes encoder and pulse signals beyond the capabilities of standard PLC input scanning, making it suitable for motion, metering, and positioning applications.
Q2. What types of sensors can be connected?
The module commonly interfaces with incremental encoders, turbine flowmeters, proximity sensors, pulse generators, and other high-speed pulse-producing devices operating with compatible logic levels.
Q3. Does the module require hardware jumpers or DIP switch settings?
No. Configuration is performed through supported GE programming software and application parameters. There are no onboard DIP switches for normal configuration.
Q4. Can the IC693APU300 operate without constant CPU intervention?
Yes. The module performs pulse detection, counting, and output control internally, reducing dependence on CPU scan time and improving response for high-speed events.
Q5. Are New Surplus modules unused?
Yes. New Surplus inventory consists of unused OEM inventory that has not been installed in production equipment. Cosmetic packaging may vary depending on storage history.
Q6. Is technical documentation available?
Yes. Installation, wiring, counter modes, memory mapping, and configuration procedures are documented in the GE High-Speed Counter manuals, including the GFK-0293 series documentation.
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