CONTROLS CONTROLS NRT SERIES LIQUID LEVEL CONTROL CONSTANT LEVEL PUMP UP UL listed * * * * CSA recognized 100 k Sensitivity 10 Amp SPDT Relay Maintain Constant Level Four Mounting Options The NRT series is applied for maintaining a constant level of conductive liquid. When the liquid decreases below the probe, the relay is energized after a 4 second time delay to avoid wave disturbances. The relay de-energizes when the liquid reaches the probe. A common electrode is needed if the container is non-conductive. s Level R T 0 T 0.3 s t SPECIFICATIONS: WIRING DIAGRAM: Input . . . . . . . . . . . . . . . . . . . . . . . . 24 VAC, 48 VAC, 110 VAC 220 VAC, 15%, 50/60 Hz Maximum power consumption . . . 24 VAC: 1.5 VA 48 VAC: 1.7 VA 110 VAC: 2 VA 220 VAC: 2 VA Output . . . . . . . . . . . . . . . . . . . . . . SPDT Relay Contact material . . . . . . . . . . . . . . AgCdO Maximum loading . . . . . . . . . . . . . 10 A AC resistive 8 A Dc resistive Maximum switching voltage . . . . . 250 VAC 250 VDC Relay maximum power rating . . . . 2500 VA 80 W Mechanical life of relay . . . . . . . . . 3 x 10 7 operations Electrical life of relay . . . . . . . . . . . 2 x 10 5 at 2200 VA resistive load Probe isolation . . . . . . . . . . . . . . . Switching contact 2000 VAC Electrodes: 2000 VAC Probe sensitivity . . . . . . . . . . . . . . 100 k Probe voltage . . . . . . . . . . . . . . . . 24 VAC, 60 Hz Probe current . . . . . . . . . . . . . . . . . 1 mA max. Operating temperature . . . . . . . . . +14F to +140F -10C to +60C Weight . . . . . . . . . . . . . . . . . . . . . . 7 oz. (200g) DNRT LNRT PNRT S S S Max C A1 11 C min max C 6 5 R 12 14 8 3 9 R 10 2 A2 4 7 4 1 11 Max 5 3 6 R 2 1 7 8 Note: The probe cables (max. 300ft) need not be shielded; however, it is not advisable to run the probe cables with power cables. If shielded cable is used, the shield and common should be connected. ORDERING INFORMATION: MOUNTING D = DIN-rail or panel mounting L = 11 pin plug-in P = 8 pin plug-in N = open PC board P NRT 110A MOUNTING SERIES INPUT POWER SERIES NRT = Enclosed NNRT = Open PC board version mounting dimensions same as NNR INPUT POWER 24A = 24 VAC 48A = 48 VAC 110A = 110 VAC 220A = 220 VAC Products and specifications subject to change without notice. Consult factory for application assistance. 204 Airline Drive, Suite 300, Coppell, Texas 75019 / Tel: (800) 677-5311 / FAX: (800) 677-3865 / www.crouzet-usa.com 5-10