Monitoring relays and float switch 72 SЕRIES Industrial washing machines Swimming pools Control and management of water Bottling plant Milk processing plant Control panels for pumps
FINDER reserves the right to alter characteristics at any time without notice. FINDER assumes no liability for damage to persons or property, caused as a result of the incorrect use or application of its products.
72 SERIES Monitoring relays 72 SERIES 72.01 Level control relays for conductive liquids 72.11 Type 72.01 -- Adjustable sensitivity -- Available also for supply 400 V -- Available also with sensitivity range (5…450)kΩ adjustable -- Available also for contact loads down to 5 V, 1 mA Type 72.11 -- Fixed sensitivity • Emptying or filling functions • Sensitivity range (5…150)kΩ adjustable • LED indicator • Reinforced insulation (6 kV - 1.2/50 µs) between: • Delay time (0.
72 SERIES 72 SERIES Monitoring relays 72.42 Special relay for alternating loads, for applications with pumps, compressors, air conditioning or refrigeration units Type 72.42 -- Priority change relay • 2 independent NO output, 12 A • 4 functions • 2 independent control signals, insulated from supply • 110…240 V and 24 V AC/DC supply versions • Modular housing, 35 mm wide • 35 mm rail (EN 60715) mount • Cd-free contact material • Multi-function (MI, ME, M2, M1) 72.
72 SERIES Monitoring relays 72 SERIES Ordering information Example: 72 series level control relay, adjustable sensitivity range, (230…240)V AC supply voltage. 7 2 . 0 Series Type 0 = Level control relay, sensitivity range adjustable (5…150)kΩ 1 = Level control relay, sensitivity fixed 150 kΩ 4 = Priority change relay No. of poles 1 = 1 CO (SPDT) 2 = 2 NO (DPST-NO) 1 . 8 . 2 4 0 . 0 0 0 Contact material 0 = Standard AgCdO for 72.01/72.11, AgNi for 72.
72 SERIES 72 SERIES Monitoring relays Technical data Insulation 72.01/72.11 Insulation between supply and contacts 72.42 Dielectric strength Impulse (1.2/50 µs) 4000 V AC 6 kV 6 kV between supply and control (for 110…240 V version only) 2500 V AC — 4 kV between electrodes, Z1-Z2 and supply* 4000 V AC 6 kV — between contacts and electrodes 4000 V AC 6 kV — between open contacts 1000 V AC 1.5 kV 1.5 kV Reference standard 72.01/72.11 72.
2 SERIES Monitoring relays 72 SERIES Functions for 72.01 and 72.11 U B1 = Supply voltage = Max level electrode B2 = Min level electrode B3 = Common = Contact 11-14 Z1-Z2 = Link to select emptying (Type 72.11) LED Contacts Supply voltage NO output contact Open Closed OFF Open 11 - 14 11 - 12 ON Open 11 - 14 11 - 12 ON Open (Timing in Progress) 11 - 14 11 - 12 ON Closed 11 - 12 11 - 14 Function and Run-on time Type 72.01 Type 72.
72 SERIES 72 SERIES Monitoring relays Emptying functions Wiring diagram Examples with 3 electrodes Type 72.01 Emptying Control - between Max. and Min. levels. Under normal operation the liquid level can be expected to cycle between the Maximum and the Minimum electrodes, B1 and B2 (plus a degree of over and under-shoot).
72 SERIES Monitoring relays 72 SERIES Functions for 72.
72 SERIES 72 SERIES Monitoring relays MI function example This shows the 72.42 Priority change relay working in conjunction with a single 72.01 level controller. Under normal conditions the liquid level is expected to remain within the range shown as Min to Max. In this case the function of the 72.42 will be to alternate the duty between both pumps, to even wear across both pumps. There is no provision to run both pumps simultaneously. ME function example This shows the 72.
72 SERIES Monitoring relays 72 SERIES Accessories for 72.01 and 72.11 Suspended electrode for conductive liquids, complete with cable. Suitable for level monitoring in wells and reservoirs not under pressure. • Electrode compatible with food processing applications (according to European Directive 2002/72 and cod. FDA title 21 part 177): 072.01.06 Cable length: 6 m (1.5 mm2) 072.01.06 Cable length: 15 m (1.5 mm2) 072.01.
72 SERIES 72 SERIES Monitoring relays Accessories for 72.01 and 72.11 Floor water sensor, designed for the detection and reporting of the presence of floor surface water. 072.11 Technical data Electrode material stainless steel (AISI 301) Wire capability of terminals Max screw torque Max. wire size 072.11 Wire strip length Nm 0.
72 SERIES Monitoring relays 72 SERIES Accessories for 72.01 and 72.11 Electrode holder with three poles. Electrode not incuded. Order appropriate number of electrodes holders - additional to the relay. 072.53 Technical data Max liquid temperature 072.53 Electrode material °C +70 stainless steel (AISI 303) Electrode and electrode connector, multiple electrodes may be interconneced to provide required length E Technical data 072.
72 SERIES 72 SERIES Monitoring relays Application notes for 72.01 and 72.11 Applications The main application for these relays is for the sensing and control of the level of conductive liquids. Selectable options allow for this control to be achieved either through a filling operation or through an emptying operation, and in either case “positive logic” is used. Level control can be achieved around a single level - using 2 electrodes, or between Minimum and Maximum levels - using 3 electrodes.
72 SERIES Float switch 72 SERIES 72.A1.0000.xxxx Float switch suitable for fluid level regulation • 1 CO • 10 A (resistive load) • 8 A (inductive load) • 2 or 3 watertight chambers resistant to high 72.A1.0000.xx02 72.B1.0000.
72 SERIES Float switch 72 SERIES Ordering information Example: 72 Series, float switch, 1 CO. 7 2 . A 1 . 0 0 0 0 . 0 5 0 0 Series Cable 00 = PVC 01 = H07 RN F 02 = ACS Certified version Type A = 2 chamber float switch B = 3 chamber float switch No. of pole 1 = 1 CO Cable length 05 = 5 meters 10 = 10 meters 15 = 15 meters 20 = 20 meters Accessories - Included in the package Counterweight for type 72.A1 Fixing Kit for type 72.B1 Counterweight (230 g) for Type 72.A1.
72 SERIES Float switch 72 SERIES Applications Type 72.A1 Emptying function Filling function E 45˚ 45˚ 45˚ When45˚black and brown wires are used, the circuit opens when the float is down and closes when the float in up. In this case the blue/grey wire must be insulated. 45˚ 45˚ Type 72.B1 Emptying function 20˚ 45˚ 20˚ 45˚ IV-2018，www.findernet.com 20˚ 20˚ 45˚ When black and blue/grey wires are used, the circuit opens when the float is up and closes when the float in down.
72 SERIES 72 SERIES Float switch Outline drawings Type 72.A1 Type 72.B1 IV-2018，www.findernet.
