Cedal FO 12.0007.A PC Retrofit-Ready Fiber Optic for FO Series: Compatible Upgrade for Legacy Control Systems
The Cedal FO 12.0007.A PC (SKU: FO 12.0007) is a precision fiber optic sensor cable engineered for seamless integration into existing FO Series photoelectric sensor installations. Designed with retrofit compatibility as a core requirement, this cable addresses the growing demand for reliable replacement components in aging automation lines where original Cedal FO Series hardware has reached end-of-life or is no longer available through standard distribution channels.
Industrial facilities operating legacy photoelectric detection systems frequently encounter the challenge of sourcing discontinued sensing cables that maintain exact optical and mechanical specifications. The FO 12.0007.A PC is purpose-built to resolve this challenge — providing a verified drop-in replacement that preserves the original detection range, bend radius tolerance, and connector interface geometry of the FO Series platform without requiring modifications to the sensor amplifier, mounting bracket, or PLC input card wiring.
Whether you are managing a planned control cabinet upgrade, responding to an unplanned cable failure, or executing a phased modernization of a production line, the FO 12.0007.A PC delivers the dimensional accuracy and optical transmission consistency required to restore system performance with minimal engineering intervention. The cable is compatible with standard M3 and M4 fiber optic amplifier heads commonly used across the FO Series range, and its plastic optical fiber (POF) construction ensures reliable light transmission in environments subject to vibration, coolant mist, and moderate temperature cycling.
For engineers coordinating a broader retrofit scope, the FO 12.0007.A PC integrates naturally alongside other FO Series components including the Cedal FO 12.0001.A amplifier unit, FO 12.0003 bifurcated fiber assemblies, and FO 12.0010 right-angle tip variants. In control cabinet configurations where the fiber cable interfaces with a Cedal SA Series sensor amplifier or a third-party amplifier such as the Autonics FX Series or Panasonic FX-301, the FO 12.0007.A PC’s standardized tip diameter and sheath flexibility ensure compatibility without optical coupling loss.
Upgrade Compatibility Table
| Parameter | FO 12.0007.A PC Specification | Retrofit Notes |
|---|---|---|
| Fiber Type | Plastic Optical Fiber (POF) | Compatible with all FO Series POF amplifier heads |
| Tip Diameter | Ø1.0 mm (standard M3 thread) | Direct replacement for M3 fiber tip sockets |
| Effective Sensing Range | Up to 100 mm (through-beam configuration) | Verify amplifier sensitivity setting after installation |
| Bend Radius (min.) | R10 mm | Route away from sharp cabinet edges; use cable clips |
| Sheath Material | PVC jacket, Ø2.2 mm OD | Compatible with standard FO Series cable clamps |
| Connector Interface | Bare tip / push-fit amplifier socket | No soldering or crimping required |
| Communication Compatibility | Passive optical — no protocol dependency | Signal output governed by amplifier (NPN/PNP selectable) |
| Replacement Scope | Direct substitute for FO 12.0007 and FO 12.0007.A variants | Confirm tip style (PC = perpendicular cut) before ordering |
| Installation Requirement | No tools required for fiber insertion | Clean tip with lint-free cloth before insertion |
| Warranty | 12 Months | Covers manufacturing defects; excludes mechanical damage |
Retrofit Planning for Existing Automation Systems
A successful retrofit using the FO 12.0007.A PC begins with a systematic audit of the existing fiber routing path. In most FO Series installations, the fiber cable is routed from the amplifier head — typically mounted on a DIN rail inside the control cabinet — through a cable conduit or drag chain to the sensing tip positioned at the detection point on the machine. Before removing the legacy cable, document the routing path, measure the required free length between the amplifier socket and the sensing tip, and confirm that the replacement cable’s 2-meter or custom length variant matches the installation geometry.
When the FO 12.0007.A PC is used as a replacement within a photoelectric detection cell that feeds a digital input to a Siemens S7-300 or S7-1200 PLC via a Cedal SA 12 amplifier, engineers should verify that the amplifier’s light-on / dark-on switching mode and output polarity (NPN or PNP) remain correctly configured after cable substitution. The fiber cable itself is passive and introduces no signal processing, but a mismatched amplifier sensitivity setting can cause false triggering or detection failure after installation.
In retrofit projects involving broader control system modernization — for example, migrating from a legacy Siemens S5 rack to an S7-300 system with ET 200M distributed I/O — the FO 12.0007.A PC is often replaced as part of a complete sensor refresh. In these scenarios, the fiber cable replacement is coordinated alongside the rewiring of terminal blocks, the reconfiguration of Profibus DP or Profinet communication links, and the update of HMI screen tag assignments in WinCC or TP700 Comfort panels. Ensuring that the fiber sensor signal is correctly mapped to the new PLC input address before commissioning prevents logic errors in the updated program.
For installations where the fiber cable passes through a cable entry plate or EMC gland on the control cabinet, confirm that the Ø2.2 mm sheath diameter of the FO 12.0007.A PC is compatible with the existing gland size. In most standard Rittal or Hoffman enclosure configurations, the existing M16 or M20 cable glands accommodate the FO Series sheath diameter without modification. If the cabinet also houses a Cedal power supply module or a 24 VDC SITOP PSU100S, verify that the fiber routing does not pass within 50 mm of high-current conductors to avoid optical interference from mechanical vibration transmitted through the cabinet structure.
Where the retrofit scope includes I/O expansion — for example, adding a Siemens SM 321 digital input module or a Phoenix Contact Inline I/O terminal to accommodate additional fiber sensors — the FO 12.0007.A PC can be deployed across multiple detection points on the same amplifier channel using a bifurcated fiber assembly. This approach reduces amplifier count and simplifies cabinet layout while maintaining detection reliability across all sensing positions.
Downtime Control During System Migration
Minimizing production downtime during a fiber optic cable replacement requires preparation that begins before the maintenance window opens. The recommended approach is to pre-route the replacement FO 12.0007.A PC alongside the existing cable during a scheduled inspection period, leaving the legacy cable active until the moment of cutover. This parallel-routing method allows the new cable to be positioned, trimmed to length, and inserted into the amplifier socket in a single operation, reducing the active replacement time to under five minutes in most installations.
Before initiating the cutover, place the PLC in manual mode or activate the relevant safety interlock to prevent unintended machine motion during the sensor signal interruption. If the system uses a Siemens S7 CPU with a structured control program, use the STEP 7 or TIA Portal diagnostic buffer to confirm that the input associated with the fiber sensor is in the expected state before and after cable substitution. This verification step protects the original program logic from triggering fault responses due to a momentary signal loss during the cable swap.
After inserting the FO 12.0007.A PC into the amplifier socket, perform a static detection test by placing a reference target at the nominal sensing distance and confirming that the amplifier output indicator illuminates correctly. Adjust the amplifier sensitivity potentiometer if the detection margin is insufficient. Once the static test is confirmed, restore the PLC to automatic mode and observe the first five machine cycles to verify that the sensor signal timing matches the original program expectations. Document the final amplifier sensitivity setting and cable routing path in the machine maintenance record for future reference.
Retrofit Support FAQ
Q: Is the FO 12.0007.A PC a direct replacement for the original FO 12.0007 without any amplifier reconfiguration?
A: In the majority of installations, yes. The FO 12.0007.A PC maintains the same tip diameter, sheath OD, and optical transmission characteristics as the original FO 12.0007. However, we recommend performing a sensitivity check on the amplifier after installation, as fiber tip cleanliness and routing geometry can affect the received light intensity margin.
Q: Can this cable be used with amplifier heads from brands other than Cedal, such as Autonics or Keyence?
A: The FO 12.0007.A PC uses a standard Ø1.0 mm POF tip compatible with most M3-socket fiber amplifier heads. Compatibility with specific third-party amplifiers should be confirmed against the amplifier manufacturer’s fiber specification sheet, particularly regarding minimum fiber OD and tip cut style (PC = perpendicular cut).
Q: What pre-shipment testing is performed on the FO 12.0007.A PC?
A: Each unit undergoes optical continuity verification and dimensional inspection prior to dispatch. Units are shipped in protective packaging to prevent tip contamination. The 12-month warranty covers manufacturing defects in fiber transmission and connector integrity under normal operating conditions.
Q: How do I confirm the correct cable length for my installation before ordering?
A: Measure the distance from the amplifier socket to the sensing tip along the actual routing path (including bends and conduit runs), then add a minimum 150 mm service loop at the amplifier end. Contact our technical team with your routing diagram if you require a custom length or a bifurcated configuration for multi-point detection.
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