The RM-216 CB EasyLine is a filter control system designed for managing compressed air pulse cleaning in filtering separators. It operates by controlling 24 V DC solenoid valves, ensuring the efficient and automatic cleaning of filter elements. Once connected to the supply voltage, the device functions fully automatically without requiring further activation, making it a straightforward solution for industrial filtration needs.
Function Description
The primary function of the RM-216 CB is to initiate and manage the cleaning process of filter elements using compressed air pulses. This involves sequentially activating solenoid valves, which in turn trigger the release of compressed air strokes to clean the filter membranes. The system is designed to handle various operational scenarios, including continuous cleaning, down-time cleaning, and cleaning triggered by an external differential pressure (Δp) switch.
In its default configuration, with the down-time cleaning input (E1, E2) bridged at the factory, the system automatically detects the number of connected valves and controls them consecutively. This ensures that cleaning starts at the first valve and proceeds in sequence. If the cleaning process is interrupted, for example, via the start/stop input (D1, D2), the control sequence will resume at the valve following the last one activated during the next cleaning procedure. A restart is also performed if the control is reactivated after a mains voltage failure.
The RM-216 CB supports expansion modules (RM-LV8 or RM-LV16) to accommodate systems with more than 16 valves. Up to seven RM-LV16 expansion modules can be connected, allowing for a maximum of 128 valve outputs. This modularity makes the system adaptable to various filter sizes and configurations.
The device also features relay outputs (S1, S2) for controlling extractor elements, such as cellular wheel sluices or trough conveyor worms, which are used for dust removal. These outputs ensure that the extractor elements are operational during both regular cleaning and down-time cleaning.
An "Alarm" relay output (A1, A2, A3) provides critical feedback on the system's status. This relay closes (A1, A2) and opens (A2, A3) when the supply voltage is present. Conversely, it opens (A1, A2) and closes (A2, A3) in the event of a supply voltage failure, an internal voltage failure, a fault in a connected O module, or if the total number of valves is set incorrectly. This alarm function helps in quickly identifying and addressing potential issues.
Usage Features
The RM-216 CB offers several operating modes and configurable parameters to suit different application requirements:
- Operation Mode: This is the standard mode where the equipment is ready for operation, performing automatic filter cleaning.
- Parameter Selection Mode: In this mode, operators can browse and select various parameters to check or modify their values.
- Parameter Setting Mode: This mode allows for the adjustment of selected parameter values.
Key parameters that can be configured include:
- Pulse Time (P01): Defines the duration of a control pulse on the valve outputs, ranging from 15 ms to 2500 ms.
- Pause Time (P02): Sets the time period between two consecutive control pulses from the valve outputs during cleaning, from 1 s to 500 s.
- Down Time Interval Time (P03): Specifies the pause time during down-time cleaning, from 1 s to 100 s.
- Total No. of Valves (P04): Allows the user to set the total number of valves connected to the system. This parameter is crucial for internal monitoring, and an alarm is issued if the set value differs from the actual number of controlled valves.
- Down Time Cleaning Cycles (P05): Determines the number of cleaning cycles performed during down-time cleaning, from 0 to 32.
- Operating Hours (P06): Displays the total operating hours of the system.
- Language (P07): Allows selection of the display text language (e.g., German, English, French).
- Test Mode (P08): Provides diagnostic functions, including:
- Valve Test (Mode 1): Activates each connected valve sequentially and displays it on the text display.
- Input Test (Mode 2): Displays the signal statuses of the inputs on the text display.
- Test Mode Off (Mode 0): Disables test mode.
Down-Time Cleaning: This feature allows for cleaning of filter elements after the system is shut down. To activate it, the factory-fitted wire jumper on input E1, E2 (terminals 10, 11) must be removed, and a free auxiliary contact of the fan contactor connected. When the fan is switched off, this contact opens, activating the down-time cleaning for the set number of cycles (P05).
Cleaning via Start/Stop Input (External Δp Switch): For systems where cleaning is controlled by an external differential pressure switch, the isolated contact of this switch must be connected to the start/stop input D1, D2 (terminals 12, 13). During down-time cleaning, this input is inactive.
Text Messages on the Display: The device provides informative text messages to indicate its status, such as "Reset RM204VXX" (reset status and text version), "Stand By" (controller not enabled), "Cleaning Off/On" (cleaning enabled/stopped or enabled/started), "DTC Cleaning ON" (down-time cleaning active), "Call Service" (service hours alarm exceeded), and "RM-LVX Alarm" (fault in O module or incorrect valve count).
Maintenance Features
The RM-216 CB incorporates features that aid in maintenance and troubleshooting:
- Service Operating Hours Alarm (P10): An alarm is issued when the operating hours set for the maintenance interval have elapsed. This helps in scheduling preventive maintenance. If set to 0 h, the alarm is switched off.
- Service Operating Hours Code (P11): A specific code needs to be entered to change the set value for the service operating hours, preventing unauthorized modifications.
- Troubleshooting Guide: The manual provides a comprehensive troubleshooting table that lists common errors, their possible causes, and recommended actions. For example:
- If the "ON" LED is not lit and input E1, E2 is bridged, possible causes include no mains voltage, a defective device fuse, or an activated emergency stop. Recommended actions include checking the power feed, replacing the fuse, or checking the emergency stop.
- If there is no valve activity, it could be due to no control system release, interrupted wiring, or a faulty magnet coil. Solutions involve bridging input E1, E2, checking cables, or replacing the coil.
- Ineffective cleaning might be caused by an interval time that is too long, pressure that is too low, a faulty valve, or a pulse time that is too short. Corresponding actions include adjusting parameter P02, checking pressure, replacing valves, or adjusting parameter P01.
- An "Alarm" LED being on could indicate that the number of valves is set incorrectly, prompting the user to correct parameter P04.
The device's design, with its text display and intuitive button interface, simplifies parameter setting and monitoring. The automatic return to operation mode after 4 minutes of inactivity in parameter selection or setting mode ensures that the system does not remain in a configuration state indefinitely. The clear indication of the current mode (operation, parameter selection, or parameter setting) via symbols on the display further enhances usability.
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