ZYGO PC200 CS1115-801-346 Laser interferometer cable

ZYGO PC200 CS1115-801-346 Laser interferometer cable

Product Overview

ZYGO PC200 CS115-801-346 is a dedicated signal transmission cable designed specifically for ZYGO PC200 series laser interferometers. Its core positioning is to achieve high-precision signal transmission and power supply (some models) between the interferometer host, measurement probe, optical components (such as spectrometers and reflectors), and data acquisition module in the laser interferometry measurement system. It is a key connecting component to ensure the integrity and stability of laser interferometry measurement signals. Its design strictly matches the interface specifications and signal transmission requirements of the ZYGO PC200 series equipment. It is not recommended to replace it with universal cables to avoid measurement signal attenuation and increased interference due to impedance mismatch and insufficient shielding performance, which may affect the measurement accuracy at the micrometer and nanometer levels.

Specification parameters

（1） Electrical performance parameters

Parameter category/specific indicators

Transmission signal type

Laser interference signal (light intensity feedback signal), control command signal (some models include low-voltage power supply signal)

Characteristic impedance

50 Ω± 5% (suitable for high-frequency transmission requirements of laser interference signals)

Signal attenuation

≤ 0.5dB/m (at 100MHz frequency, room temperature 25 ℃)

Crosstalk attenuation

≥ 60dB (between adjacent signal lines, at 100MHz frequency)

Working voltage (power supply core, if included)

DC 5V ± 0.2V (providing auxiliary power supply for probes and other components)

Maximum power supply current (power supply core, if included)

≤1A

（2） Physical structural parameters

Parameter category/specific indicators

Cable structure

Multi core shielding structure, including signal core wire, ground wire (some including power supply core wire)

Core wire specifications

Signal core wire: 24AWG (silver plated copper conductor to enhance conductivity and corrosion resistance); Power supply core wire (if included): 22AWG (pure copper conductor)

Insulation material

Core wire insulation: polytetrafluoroethylene (PTFE), temperature resistance range -60 ℃ -200 ℃; Outer sheath: polyvinyl chloride (PVC) or polyurethane (PU), flame retardant grade UL94 V-0

Shielding layer

Double layer shielding: inner layer aluminum foil (coverage ≥ 95%)+outer layer tin plated copper braided mesh (coverage ≥ 90%), effectively isolating electromagnetic interference

Outer diameter of cable

8mm-10mm (slightly different depending on the number of core wires and shielding layer structure)

Standard length

3m, 5m, 10m (regular models, longer lengths can be customized, such as 20m, please pay attention to signal compensation for long-distance transmission)

Interface type

One end: DB9 male/female head (compatible with interferometer host interface); On the other end: SMA connector/micro rectangular connector (compatible with measuring probes or optical component interfaces, subject to equipment matching), gold-plated interface to reduce contact resistance

（3） Environmental and durability parameters

Parameter category/specific indicators

Working temperature

-40 ℃ -85 ℃ (conventional outer sheath); -60 ℃ -200 ℃ (High temperature customized outer sheath, such as PU material)

Storage temperature

-50℃-100℃

Relative humidity

≤ 95% (no condensation, at 25 ℃)

Bending performance

Minimum bending radius: Static 10 times the outer diameter of the cable, dynamic 15 times the outer diameter of the cable (can withstand more than 10000 reciprocating bends without core wire breakage or shielding layer detachment)

Tensile strength

≥ 100N (along the axial direction of the cable to avoid tensile fracture of the core wire)

Chemical resistance

Resistant to oil stains and conventional industrial solvents such as alcohol and acetone, with no swelling or cracking of the outer sheath in short-term contact

Performance characteristics

High precision signal transmission capability: Using 24AWG silver plated copper signal core wire and PTFE insulation material, combined with a 50 Ω characteristic impedance design, it can effectively reduce the transmission attenuation and signal distortion of laser interference high-frequency signals, ensure the accurate transmission of nanoscale measurement signals from the probe to the host, and guarantee the accuracy of measurement data.

Strong electromagnetic shielding performance: The double-layer shielding structure (aluminum foil+tinned copper braided mesh) has a coverage rate of over 90%, which can significantly weaken the impact of external electromagnetic interference (such as high-frequency radiation from industrial equipment and power grid noise) on signals, especially suitable for use in complex electromagnetic environments such as laser processing workshops and precision manufacturing plants.

Excellent environmental adaptability: The core wire insulation and outer sheath are made of high and low temperature resistant, flame-retardant materials, which can work stably in a wide temperature range of -40 ℃ -85 ℃ (conventional version). The outer sheath has good tensile, bending and chemical corrosion resistance, and can adapt to the mobile wiring and long-term use needs of measurement sites.

High reliability interface design: The interface is treated with gold plating, which not only reduces contact resistance (≤ 50m Ω), but also enhances oxidation and corrosion resistance, reducing signal interruption or fluctuation caused by poor interface contact; At the same time, the interface specifications are strictly matched with ZYGO PC200 series devices to ensure smooth insertion and secure connection.

Multi functional integration (some models): Some specifications of cables integrate signal transmission and low-voltage power supply functions, without the need to lay additional power cables for measurement probes, simplifying system wiring, reducing on-site installation complexity, and avoiding interference and stacking problems caused by multiple cables running in parallel.

Working principle

The core function of the ZYGO PC200 CS115-801-346 laser interferometer cable is to achieve "bidirectional signal transmission" and "auxiliary power supply (some models)". Its working logic revolves around "ensuring signal integrity", and the specific process is as follows:

Signal transmission path: The feedback signal of the light intensity captured by the laser interferometer measurement probe (reflecting the key information of the displacement and contour of the measured object) is transmitted to the interferometer host through the signal core wire inside the cable; At the same time, control commands issued by the host (such as probe sensitivity adjustment and measurement mode switching commands) are transmitted in reverse to the probe through another set of signal core wires, achieving bidirectional signal interaction.

Shielding and anti-interference mechanism: The double-layer shielding layer (aluminum foil+copper braided mesh) forms an "electromagnetic barrier", which on the one hand prevents external electromagnetic noise (such as the radiation of frequency converters and motors in the workshop) from entering the interior of the cable and interfering with the measurement signals in the signal core wire; On the other hand, it prevents high-frequency signals inside the cable from radiating outward, avoiding interference with other devices and ensuring that the signal is "pure and distortion free" during transmission.

Power supply support (some models): If the cable contains a power core wire, the interferometer host provides a stable DC 5V low-voltage power supply to the measurement probe through this core wire, meeting the working power requirements of the internal photoelectric conversion components (such as photodiodes) of the probe, without the need for additional independent power supply, ensuring the synchronization of power supply and signal transmission, and avoiding the impact of power supply fluctuations on the signal acquisition accuracy of the probe.

Signal integrity assurance: The characteristic impedance matching (50 Ω) design ensures that the impedance of the cable is consistent with the input/output impedance of the interferometer host and probe, reducing signal reflection loss at the interface; The combination of silver plated copper core wire and PTFE insulation material reduces the resistance and dielectric loss of the core wire, ensuring that the attenuation of the signal is controlled within an acceptable range (≤ 5dB/10m) during long-distance transmission (such as 10m or more), without the need for additional signal amplifiers.

Precautions

（1） Selection and installation precautions

Accurate matching of models: Based on the specific sub models (such as PC200-1, PC200-3) of the ZYGO PC200 series interferometer and the interface types of the connecting devices (probes, optical components), select the corresponding interface specifications of cables (such as DB9+SMA, DB9+micro rectangular connectors), and confirm whether integrated power supply function is needed to avoid connection failure or signal transmission abnormalities caused by model mismatch.

Reasonable length planning: Priority should be given to selecting standard length cables that match the measurement site wiring distance. If customized long-distance cables (such as exceeding 10m) are required, ZYGO technical support should be consulted to confirm whether a signal compensation module needs to be added to the host end to prevent excessive signal attenuation caused by long-distance transmission; Avoid redundant winding caused by excessively long cables, reduce the number of bends and signal interference risks.

Standardized wiring installation: When wiring, it is necessary to stay away from strong electromagnetic interference sources (such as high-power transformers, high-frequency welding machines, servo motor drivers), and the parallel distance with power cables (such as 380V AC motor cables) should be ≥ 30cm. When crossing, it should be perpendicular to reduce electromagnetic coupling interference; When fixing cables, use insulated clamps to avoid direct contact between the cables and metal brackets or high-temperature equipment, and to prevent wear of the outer sheath or high-temperature aging.

Correctly plug and unplug interfaces: When plugging and unplugging interfaces, hold the interface shell to avoid pulling the cable itself and prevent the core wire from breaking at the interface welding point; Ensure alignment with the positioning pin when inserting the interface to avoid bending or damaging the interface pins due to forced insertion and removal; When not in use for a long time, a dust cap should be placed on the interface to prevent dust and oil from entering and affecting the contact performance.

（2） Precautions for use and maintenance

Avoid excessive bending and stretching: Do not bend the cable below the minimum bending radius during use, especially when moving the probe, reserve sufficient cable length to avoid excessive pulling of the cable; It is prohibited to use cables as "load-bearing ropes" for hanging equipment to prevent core wire breakage and shielding layer detachment caused by stretching.

Regularly check the status of cables: visually inspect the outer sheath of cables every month for damage, cracking, swelling (if in contact with chemical solvents), and whether the shielding layer is exposed; Check the interface quarterly for looseness and oxidation of the gold plating layer (such as blackening or rusting of the interface). If oxidation is found, gently wipe the interface with a cotton swab of anhydrous alcohol to remove the oxidation layer (do not use sandpaper or hard cloth to polish, to avoid damaging the gold plating layer).

Cleaning and Storage: When cleaning cables, wipe the outer sheath with a dry soft cloth. If there is oil stains, dip a small amount of neutral cleaning agent (such as soapy water) to wipe. Do not use highly corrosive solvents (such as gasoline and toluene); When storing for a long time, the cable should be coiled into a coil with a diameter of ≥ 30cm (avoiding excessive bending), stored in a dry, ventilated, and non corrosive gas environment, away from high temperatures and sharp objects.

Troubleshooting and Replacement: If the laser interferometer experiences signal interruption or significant fluctuations in measurement data, the cable can be checked first: replace the backup cable. If the fault disappears, it is determined that the original cable is damaged; If the fault persists, check the interface between the host and the probe again. After the cable is damaged, it is necessary to replace it with the original cable of the same model. It is forbidden to splice the cable or replace the interface by oneself to avoid damaging the impedance matching and shielding structure, which will affect the measurement accuracy.

（3） Precautions for use in special environments

High temperature environment (such as near heating equipment and metallurgical workshops): High temperature customized cables (with PU outer sheath and temperature resistance of -60 ℃ -200 ℃) should be selected. At the same time, high-temperature protective sleeves (such as ceramic fiber sleeves) should be installed in the sections of the cable near the high temperature source to avoid melting of the outer sheath and insulation failure of the core wire.

Damp or dusty environments (such as food processing workshops and mining inspection sites): Waterproof tape should be wrapped around the interface or waterproof joints should be installed to prevent water vapor and dust from entering the interface; Regularly use compressed air (pressure ≤ 0.3MPa) to blow away dust on the surface of the cable, avoiding dust accumulation that affects heat dissipation or seeps into the interior of the cable.

Frequent movement scenarios (such as dynamic measurement with robot mounted probes): Choose cables with high flexibility outer sheaths (such as PU material) to ensure that the cables can withstand high-frequency bending; Install cable drag chains in sections with frequent cable bending, such as robot joints, to reduce friction between cables and other components and extend their service life.