Renishaw A-2115-001-24 Original Industrial Spare OMI Compatible

Product Overview

Renishaw A-2115-001-24 Original Industrial Spare OMI Compatible: System Stability & Maintenance Value

The Renishaw A-2115-001-24 is an original Optical Machine Interface (OMI) receiver unit designed for use with Renishaw’s radio and optical transmission systems on CNC machine tools. As a critical link between the machine tool spindle probe and the CNC controller, the OMI-1.5 KTI ensures reliable, interference-free signal transmission — making it an indispensable component for maintaining measurement accuracy, process control, and overall system stability on the shop floor.

For maintenance engineers and procurement teams managing aging CNC infrastructure, securing a verified original spare of the A-2115-001-24 is a proactive step toward eliminating unplanned downtime. Whether you are replacing a failed unit, building a critical-spares inventory, or extending the service life of a legacy Renishaw probing system, this module delivers the original performance specification your machine demands.

Critical Technical Specs

Preventive Maintenance Strategy

The A-2115-001-24 OMI receiver sits at the heart of your CNC probing circuit. When planning a scheduled maintenance window or responding to a measurement fault alarm, it is best practice to inspect the entire signal chain rather than replacing the OMI unit in isolation. A systematic approach significantly reduces the risk of repeat failures and shortens the time to restore full production capability.

Begin with the Renishaw OMP60 or OMP400 spindle probe — the transmitting end of the optical link. A degraded probe stylus, a cracked probe body, or a depleted probe battery (common in OMP40/OMP60 units) can mimic OMI receiver faults and lead to misdiagnosis. Inspect the probe’s optical window for coolant contamination and verify battery voltage before condemning the A-2115-001-24.

Next, examine the interface cable and connector assembly between the OMI and the CNC controller’s skip-signal input. Vibration-induced connector fretting and coolant ingress at the M12 or D-sub connector are common failure modes on high-cycle machining centres. Stocking a spare Renishaw interface cable (e.g., A-1335-0500 or equivalent machine-specific cable) alongside the OMI unit eliminates a second service call if the cable is found to be the root cause.

The 24 V DC power supply module feeding the OMI should also be verified. Voltage sag or ripple on the 24 V rail — often caused by a failing DIN-rail power supply (PSU) shared with other machine peripherals — can cause intermittent OMI dropouts that are difficult to reproduce during static testing. A calibrated multimeter check or a temporary substitution with a known-good bench PSU will confirm rail integrity.

Within the control cabinet, inspect the I/O module or skip-signal input card on the CNC controller (Fanuc, Siemens SINUMERIK, Mitsubishi M70, or Heidenhain TNC series, depending on your machine). A faulty digital input channel can absorb a perfectly functional OMI signal without triggering the expected skip response. Swapping the skip input to an adjacent channel is a low-risk diagnostic step that requires no parts.

For machines using a Renishaw RMP60 or RMP600 radio probe system in parallel with an optical OMI circuit, also verify the RMI (Radio Machine Interface) receiver and its antenna orientation. Cross-interference between optical and radio channels is rare but has been documented in dense multi-machine cells.

Finally, review the condition of the machine tool’s coolant filtration system and air purge circuit. Contaminated coolant mist is the leading cause of premature OMI optical window fouling. If your machine is equipped with an air purge nozzle directed at the OMI window, confirm that the solenoid valve and air regulator for the purge circuit are functioning correctly. Scheduling replacement of these low-cost pneumatic components during the same maintenance window as the A-2115-001-24 swap maximises uptime between service intervals.

Strategic Replacement Solutions

The Renishaw A-2115-001-24 is a direct replacement for earlier OMI variants used across a wide installed base of machining centres manufactured from the late 1990s through to the present day. Its compatibility with the KTI (Kinematic Tool Interface) optical protocol means it can be retrofitted into systems originally equipped with older OMI-1 or OMI-2 receivers without requiring CNC parameter changes in most cases — consult your machine’s Renishaw installation manual to confirm the skip-signal polarity setting.

For facilities managing a mixed fleet of CNC machines from multiple OEMs, standardising on the A-2115-001-24 as the single OMI spare across compatible machines simplifies inventory management and reduces the total number of line items in your critical-spares register. A single verified spare held on-site can cover multiple machines, reducing capital tied up in slow-moving inventory while maintaining the ability to respond to a failure within the same shift.

When a legacy machine’s CNC controller is due for a retrofit or upgrade, the A-2115-001-24 OMI is fully compatible with modern Fanuc 0i-MF, Siemens 840D sl, and Mitsubishi M80 series controllers, provided the skip-signal interface is correctly configured. This forward compatibility protects your investment in the Renishaw probing system and avoids the cost of a full probe system replacement during a controller upgrade project.

All units supplied by TOPNLMS are tested for optical signal output and trigger response prior to shipment. Each unit is dispatched with protective packaging suitable for international freight and is covered by a 12-month warranty against manufacturing defects and functional failure under normal operating conditions.

Support FAQ

Q1: How do I verify that the A-2115-001-24 is compatible with my existing Renishaw probing system?
The A-2115-001-24 is designed for use with Renishaw’s OMI-1.5 KTI optical transmission system and is compatible with OMP40, OMP60, OMP400, and OMP600 spindle probes. Check the part number on your existing OMI unit and cross-reference with your Renishaw system documentation. If you are unsure, provide your machine model and existing probe part number to our team at [email protected] and we will confirm compatibility before you order.

Q2: What is included in the 12-month warranty and what does the pre-shipment test cover?
Every A-2115-001-24 unit is functionally tested for optical signal reception, trigger output integrity, and supply voltage compliance before dispatch. The 12-month warranty covers failure under normal operating conditions and excludes damage caused by incorrect installation, overvoltage, or physical impact. In the event of a warranty claim, we arrange collection and replacement or refund at no additional cost to the buyer.

Q3: How should I manage spare-part inventory for the OMI receiver to minimise downtime risk?
For facilities running two or more CNC machines equipped with Renishaw optical probing systems, we recommend holding a minimum of one A-2115-001-24 on-site as a critical spare. Given the typical lead time for sourcing original Renishaw components through standard distribution channels, a locally held spare eliminates the risk of a multi-day production stoppage. Pair the OMI spare with a spare probe battery kit and interface cable to cover the most common failure modes in a single maintenance kit.

Q4: Can the A-2115-001-24 be installed by in-house maintenance staff, or does it require a Renishaw service engineer?
Installation of the A-2115-001-24 is straightforward for qualified maintenance technicians familiar with CNC machine tool electrical systems. The unit mounts to the machine column or enclosure using the existing bracket, and the electrical connections follow the original wiring diagram. No specialist tooling is required. Renishaw’s installation guide (available from Renishaw’s documentation portal) provides step-by-step instructions including skip-signal verification using the machine’s diagnostic screen. For first-time installations or controller-specific configuration questions, our technical team is available via email or phone.