User Manual Q&AAnswer
Dec 09, 2025 - 11:05 AM
To address potential interference issues when using the , follow these guidelines:
1. **Spatial Separation of Cables:** Ensure that line power cables are routed with spatial separation from signal and data transmission cables. Analog and digital signal cables should also be separated to prevent interference.
2. **Use Shielded Cables:** It is recommended to use shielded cables for analog signals. Make sure that cable shields are not interrupted by intermediate terminals. The shielding should be earthed directly after the cable enters the cabinet.
3. **Interference Suppressors:** When switching inductive loads (e.g., coils of contactors, relays, solenoid valves), install interference suppressors. RC snubbers or varistors are suitable for AC voltage, and freewheeling diodes are recommended for DC voltage loads. Connect the suppressing elements as close to the coil as possible.
4. **Proper Arrangement of Power and Signal Cabling:** Avoid laying power and signal wiring in parallel cable trays as it can cause interferences in monitored and control signals. Proper arrangement of power and signal cabling is crucial for the operation of the entire control system.
5. **Use AC/DC Power Suppliers:** Power controllers/modules with AC/DC power suppliers for better and more stable insulation compared to AC/AC transformer systems. AC/AC transformer systems may transmit disturbances and transient phenomena like surges and bursts to devices.
6. **External Protection Devices:** Protect power supply systems for the product with external devices that limit overvoltage and effects of lightning discharges.
7. **Avoid Single Power Source:** Avoid powering the product and its controlled/monitored devices, especially high-power and inductive loads, from a single power source to prevent disturbances from the loads to the control devices.
By following these guidelines and recommendations from the iSMA-B-4I4O-H-IP module manual, you can minimize potential interference issues and ensure the smooth operation of your system.
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