The sensor type selection on the unit is performed by switching the DIP switch to P position (sensors PO, PC) or to N position (other types of sensors). Mutual combination of PO, PC sensors with other types is not permissible. Combining sensors NO, NC, with SO and SC is possible.
OPERATING ELEMENTS
DSU–1222–W
- Switch “CH1”, “CH2”
- position P: The unit reacts to the current fl owing into the input terminals (10, 13). Designed for PNP type sensors.
- position N: The unit reacts to the current fl owing from the input terminals (10, 13). Designed for NPN and S type sensors.
- Switch “LC”
- position OFF: Activation of the basic mode.
- position ON: Activation of the pump control mode.
SDSU–1222–W
- Switch “CH1”, “CH2”
- position OFF: Sensor 1 (“CH1”) or 2 (“CH2”) is not ready to set by buttons “SETTING”
- position ON: Sensor 1 (“CH1”) or 2 (“CH2”) is ready to set by buttons “SETTING”
- Switch “LC”
- position OFF: Activation of the basic mode.
- position ON: Activation of the pump control mode.
- Button “SETTING ON”: Setting the selected sensor to open state.
- Button “SETTING OFF”: Setting the selected sensor to closed state.
FUNCTION DESCRIPTION
Basic mode – LC switch in OFF position
- Activation the sensor connected to IN 1 input causes closing the output relay RE 1 (terminals • 7-6 are closed) and shining LED indicator “OUT 1”.
- Activation the sensor connected to IN 2 input causes closing the output relay RE 2 (terminals 4-3 are closed) and shining LED indicator “OUT 2”.
Pump-up function – “LC” switch in ON position
- When the level drops below the sensor connected to IN 1 (MIN) input, the output relay RE 1 closes (terminals 7-6 are closed), LED indicator “OUT 1” start shining. This starts the active device (pump, valve, etc.) and the level goes up. When the level reaches the position of the sensor connected to IN 2 (MAX) input, the output relay RE 1 opens (terminals 7-6 are open). This stops the active device and the level goes down. LED indicator “OUT 1” darkens
Pump-down function – “LC” switch in ON position
- When the level drops below the sensor connected to IN 2 (MAX) input, the output relay RE 1 opens (terminals 7-8 are closed), LED indicator “OUT 1” darkens. This starts the active device (pump, valve, etc.) and the level goes down. When the level reaches the position of the sensor connected to IN 1 (MIN) input, the output relay RE 1 closes (terminals 7-8 are open). This stops the active device and the level goes up. LED indicator “OUT 1” start shining.
Note: DSU–1222–W and SDSU–1222–W units in pump function mode:
- For minimum level, select such sensor, which is open when the liquid level is not present (PO, NO, SO).
- For maximum level, select such sensor, which is closed when the liquid level is not present (PC, NC, SC).
SAFETY, PROTECTION AND COMPATIBILITY
Evaluation switching units are equipped with protection against current overload. Units are sheltered by fuse T 50 mA. Electrical
equipment of protection group II. Electrical safety according to EN 61010-1.
Electromagnetic compatibility according to EN 55022, EN 61000-4-2, -3, -4, -5, -6, -11 and EN 6100-6-2.
