Protection RS485 Modbus RTU User Manual | 9 Current limit Current limits can be configured to avoid crushing when meeting an obstacle. These values can be adjusted according to your preferences. Use default values or fine-tune your current limits with 0.25 A/bit. It is important to note that current limits should not be relied upon as a general stop function, as this will potentially stress the mechanics and could lead to long-term damage to the actuator. Furthermore, current limits do not correlate directly with the actuator’s load curves, meaning they should not be used as indicators of load. Various tolerances in components such as the spindle, nut, and gears can also affect the current consumption of the actuator. Operation in environments with temperatures below 0°C will also increase the current consumption. When temperature drops below 0°C, the default current limit will change to a higher value. Actuator specific current limit values (above and below reference temp.) can be found in the respective actuator user manual or in the Actuator Connect ™ service tool under ‘Protection’. Parallel The industrial LINAK ® actuators can be ordered with parallel functionality. If this feature is enabled, it is possible to run up to 8 actuators in a parallel system with just one actuator occupying one node. The system works as a critical parallel, meaning that all actuators must be present in the system and have the exact same configuration (both mechanical and software functionality). Below is a checklist to ensure that the system operates as intended: Action Set up parallel in Actuator Connect Wire up the system Check cable lengths Check power supply Description Each actuator must be configured to operate in parallel (2-8 actuators). This can be set up using the Actuator Connect tool. Please note: In some cases this is pre-configured from factory. The actuators feature internal communication for parallel synchronisation and error codes. Parallel communication utilises two wires, which must be separately connected in a junction box (see connection diagram). Keep the total length of the communication line below 40 meters to avoid communication dropouts. In a parallel system with 8 actuators this would result in signal cable lengths of <5 metres. It is also possible to use two or more separate power supplies in parallel under the condition that they have the same voltage and wattage output. It is essential that all power supplies share a common ground connection (Blue wire). Please respect actuator specifications regarding voltage level and current consumption!
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