Description
Product Introduction & Engineering Value
Precision measurement failures often begin with a controller that can no longer communicate correctly with aging measurement heads or production equipment. The KEYENCE LS-7601 was designed as the high-performance controller unit for the LS-7000 digital micrometer platform, providing measurement processing, display, calibration, and production judgment functions.
For manufacturing lines where dimensional inspection is integrated directly into production equipment, the LS-7601 helps maintain existing measurement systems without replacing the complete optical measurement setup. It supports two sensor heads and includes monitor functionality for compatible measuring heads.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | KEYENCE |
| Model | LS-7601 |
| Series | LS-7000 |
| Controller Type | High-performance controller with monitor function |
| Sensor Head Connection | 2 heads |
| Display | 5.5-inch TFT LCD |
| Minimum Display Unit | 0.01 µm to 100 µm (7 selectable levels) |
| Display Range | ±99.99999 to ±9,999.9 mm |
| Power Supply | 24 VDC ±10% |
| Power Consumption | 1.2 A max. |
| Communication Interface | RS-232C |
| Video Output | NTSC-compatible output |
| Protection Rating | IP64 (panel surface only) |
| Operating Temperature | 0 to +40 °C |
| Weight | Approx. 1,010 g |
Field Application & The “Trench” Experience
A precision machining facility running automotive transmission components experienced intermittent measurement alarms on an inspection station using an LS-7000 optical micrometer system. The original LS-7601 controller had been installed for years, and the production team needed a replacement without changing sensor alignment or PLC measurement logic.
The maintenance engineer verified the controller model, connected sensor heads, and RS-232C communication settings before replacement. After installation, the replacement controller restored measurement display, tolerance judgment, and production data communication.
Common application scenarios include:
- Automotive shaft diameter inspection with in-line optical measurement
- Electronic component thickness verification during high-speed assembly
- Precision extrusion diameter monitoring and statistical quality control
LS-7601
LS-7601
Transparency SOP: QA & Testing
Before an LS-7601 unit is released as New Surplus or Refurbished stock, the inspection process should include:
1. Identification Check
- Verify KEYENCE label information.
- Confirm LS-7601 model designation.
- Check housing, connectors, and terminal condition.
2. Hardware Inspection
- Inspect LCD condition.
- Examine communication ports and I/O terminals.
- Check for corrosion, contamination, or physical damage.
3. Functional Testing
- Apply correct 24 VDC power input.
- Confirm display startup.
- Verify controller response and measurement functions when compatible LS-series equipment is available.
4. Shipment Preparation
- Protect connectors and display surfaces.
- Record inspection results for traceability.
The Veteran’s Tech Trap Guide
⚠️ Sensor Head Compatibility Is Not Optional
The LS-7601 works with LS-7000 series measuring heads, but incorrect sensor head combinations or missing configuration data can prevent normal measurement operation. Confirm the complete measurement setup before installation.
⚠️ Check Communication Settings
When replacing an LS-7601 in an automated inspection cell, RS-232C parameters, output format, and PLC communication handling must be verified. A controller can power on correctly while still failing production communication.
PRO TIP: Save existing measurement programs before removing the original controller whenever possible. The LS-7601 supports program memory functions, and lost parameters can increase commissioning time.
⚠️ Do Not Ignore Calibration
Precision measurement systems depend on correct calibration values. After replacement, confirm zero position, measurement mode, and tolerance settings before returning equipment to production.
Dynamic FAQ
Q1: What is the KEYENCE LS-7601 used for?
The LS-7601 is a high-performance controller for the KEYENCE LS-7000 digital micrometer system. It processes measurement signals, displays values, performs calculations, and manages inspection outputs.
Q2: How many sensor heads can connect to the LS-7601?
The LS-7601 supports connection of two sensor heads and is compatible with LS-7000 series head types.
Q3: Does the LS-7601 require 24 VDC power?
Yes. The controller operates on 24 VDC ±10% with maximum power consumption of approximately 1.2 A.
Q4: Can an LS-7601 replace an existing unit directly?
Replacement is possible when the installed system configuration matches, including sensor heads, wiring, programs, and communication settings.
Q5: Is a refurbished KEYENCE LS-7601 reliable for production use?
A refurbished unit should be evaluated through electrical inspection, functional testing, and verification of measurement-related functions before installation.
Q6: How can buyers confirm New Surplus LS-7601 authenticity?
Verify original KEYENCE labeling, model markings, physical condition, and supplier inspection documentation. New Surplus status should refer to unused inventory condition rather than simply a clean appearance.
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