Dinel CDSU Level Control Relay

Dinel CDSU Level Control Relay are dual-channel units designed to evaluate the states of the conductive probes. They include power supply 5 V AC for supplying the probes. The DIP switches enable to select a basic mode (an independent function of two limit sensors) or the level control mode between the maximum and minimum level (pump control). The level control relay allows continuous sensitivity adjustment and time delay set up by trimmer.

Dinel CDSU Features

The function of pump control (Low-high level control) or independent 2-channel function
For connection of one or two probes
Continuous sensitivity adjustment and time delay set up
Optical state indication
Cases for wall mounting or for mounting on DIN rail 35mm

Function description

Basic mode – “LC” switch in OFF position

Activation of the probe connected to IN 1 input causes the closing of the output relay RE 1 terminal 14; 15 (CDSU–522) or 7; 6 (CDSU–522–W) is closed and shining LED indicator “OUT 1”.
Activation of the probe connected to IN 2 input causes the closing of the output relay RE 2 terminals 4; 3 (CDSU–522) or 10, 11 (CDSU–522–W) is closed and shining LED indicator “OUT 2”.

Pump-up function – “LC” switch in ON position

When the level drops below the probe connected to IN 1 (MIN) input, the output relay RE 1 terminal 14; 15 (CDSU–522) or 7; 6 (CDSU–522–W) are closed. The LED indicator “OUT 1” starts shining. This starts the active device (pump, valve, etc.) and the level goes up. When the level reaches the position of the probe connected to IN 2 (MAX) input, the output relay RE 1 terminal 14; 15 (CDSU–522) or 7; 6 (CDSU–522–W) 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 probe connected to IN 2 (MAX) input, the output relay RE 1 terminal 14; 16 (CDSU–522) or 7; 8 (CDSU–522–W) is 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 probe connected to IN 1 (MIN) input, the output relay RE 1 terminal 14; 16 (CDSU–522) or 7; 8 (CDSU–522–W) is open. This stops the active device and the level goes up. The LED indicator “OUT 1” starts shining.

Dinel CDSU Specifications

	CDSU – 522	CDSU – 522 – W
Nominal supply voltage	230 V AC / 50 Hz (± 10 %)	230 V AC / 50 Hz (± 10 %)
Nominal power demand	4 VA	4 VA
Output voltage to supply probes	5 V AC / 70 Hz	5 V AC / 70 Hz
Output short circuit current	0.2 mA	0.2 mA
Max. duration of output short-circuit	Unlimited	Unlimited
No. of connecting probes	1 or 2 (+ common)	1 or 2 (+ common)
No. of switching channels	2	2
Input currents	0 … 0.2 mA *	0 … 0.2 mA *
Range of continuous sensitivity	10 … 250 kΩ	10 … 250 kΩ
Output delay	1 s	0.5 … 10 s
Contact rating
Max. load current	2A	2A
Max. switching voltage	250 V	250 V
Max. switching power	500 VA	500 VA
Max. switching frequency at maximum load	360 / h	360 / h
Contact life at maximum load	Min. 106 cycles	Min. 106 cycles
Ambient temperature range	-20 … +50°C	-20 … +50°C
Maximum / recommended conductor size	4 mm2 / 0.5 … 1 mm2	2.5 mm2 / 0.14 … 0.5 mm2
Protection class	IP20	IP65
Weight	Approx. 0.2 kg	Approx. 0.35 kg
* by adjusted sensitivity