How Do You Select Control Cable for a Packaging Machine?

Select each cable route by answering five questions: what circuit it serves, which voltage and conductor arrangement it requires, whether EMI shielding is needed, whether the route is fixed or moving, and which temperature, abrasion, oil, chemical or washdown conditions apply.

Packaging machines rarely use one universal cable. A protected PLC cabinet may use conventional multicore control cable, a noise-sensitive sensor route may need screened or twisted-pair construction, and a moving carriage may require a cable with documented continuous-flex performance. Motor power, encoder and industrial communication connections must follow their own equipment requirements.

Divide the Packaging Machine into Cable Zones

Start with the machine layout and electrical schematic. Mark each route as fixed, exposed, occasionally moving or continuously moving, then identify the circuit carried through that zone.

Match the Cable to Each Machine Subsystem

PLC control cabinets

Protected cabinet wiring usually prioritizes voltage rating, conductor cross-section, identification, routing and termination. LiYY or YY may be evaluated for general low-interference control circuits, while LiYCY or CY may suit compatible routes that require screening.

Photoelectric and proximity sensors

Confirm the sensor voltage, output configuration, conductor arrangement, route length, connector and EMI exposure. A suitable sensor and actuator cable can serve standard device connections; selected analogue circuits may require twisted pairs or screening.

Solenoid valves and pneumatic actuators

Match conductor size and voltage drop to coil current and cable length. Consider switching transients at the circuit level, including the protection specified for the valve and controller.

Servo drives and VFD systems

Drive sections can introduce interference into nearby control and measurement wiring. Screened control cable may suit compatible control signals, but it does not automatically replace the motor power, encoder, feedback or communication cable specified by the drive manufacturer.

HMI and operator panels

Stationary switches and indicators may use general control wiring. Adjustable arms or moving operator stations require a defined motion profile, while communication interfaces need protocol-compatible cable. Safety circuits follow the approved machine safety design.

LiYY, LiYCY, YY, CY and SY: What Changes?

These common flex control cable families provide different combinations of conductor arrangement, shielding and mechanical protection.

Copper braid and steel-wire braid serve different purposes: CY-type copper screening supports EMC control in suitable circuits, while SY steel-wire braid adds mechanical protection. Neither the family name nor the word “flexible” proves washdown, high-temperature, communication or continuous-motion suitability.

Flexible Cable vs. Continuous-Flex Cable

Installation flexibility describes how a cable can be handled or bent under its permitted conditions. Continuous-flex performance describes repeated dynamic movement and requires a construction evaluated for that duty.

For a moving carriage, gantry, sealing head or drag chain, specify:

• Minimum dynamic bend radius and cable carrier geometry
• Travel length, acceleration and operating speed
• Expected cycles and the test conditions used to support them
• Torsion, temperature, abrasion and chemical exposure
• Installation, guidance and strain-relief requirements

Standard LiYY, LiYCY, YY, CY and SY descriptions do not establish drag-chain suitability. Use exact product documentation that covers the required motion profile.

How to Manage EMI in Packaging Machine Wiring

Unstable analogue readings, communication errors or unexpected input changes can occur when sensitive circuits share an unfavorable electromagnetic environment with motors, drives and switching equipment. Cable selection is one part of the remedy.

Choose the Jacket for the Real Environment

PVC can be an economical choice for protected industrial control wiring when its documented temperature and mechanical properties fit the route. LSZH may be specified where smoke and halogen-related fire requirements matter, but the designation does not establish chemical, washdown or continuous-flex performance.

Food, beverage, pharmaceutical and cleaning-intensive lines may expose cables, glands and connectors to water, detergents, disinfectants, oils and process chemicals. Confirm compatibility with the actual substances, concentration, temperature and cleaning frequency. For sealing stations, evaluate the cable-route temperature rather than the temperature of the packaged product or heater setpoint.

Example: Automatic Carton Packaging Line

Consider an automatic line with an infeed conveyor, product sensors, pneumatic pushers, folding equipment, a sealing station and discharge conveyor. A central PLC controls the line while motors and VFDs drive the conveyors.

The final schedule follows the complete schematic, mechanical layout, environmental requirements and product data. The broader power and control cable solution can support product-family evaluation for machinery projects.

Build a Packaging Machine OEM Cable Specification

A route-by-route cable schedule improves purchasing consistency, assembly documentation and after-sales maintenance. It also separates standard cabinet wiring from screened, exposed and dynamic applications.

OEMs can standardize approved groups for cabinet control, screened analogue signals, sensor connections and verified dynamic-motion wiring. Standardization should still preserve differences in voltage, circuit function, environment and movement.

Common Packaging Machine Cable Selection Mistakes

Frequently Asked Questions