Level switch HRH-5 ! Relay is designed for monitoring levels in wells, basins, reservoirs, tanks... ! In one device you can choose the following configurations: - one-level switch of conductive liquids (by connecting H and D) - two-level switch of conductive liquids ! One-state device monitors one level, two-state device monitors two levels (switches on one level and switches off on another level) ! Choice of function PUMP UP, PUMP DOWN ! Adjustable time delay on the output (0.5 - 10s) ! Sensitivity adjustable by a potentiometer (5-100kΩ) ! Measuring frequency 10Hz prevents polarization of liquid and raising oxidation of measuring probes ! Galvanically separated supply voltage UNI 24.. 240 VAC/DC ! Output contact 1xchangeover/SPDT EAN code HRH-5: 8595188136396 ! 1-MODULE, mounting onto a Technical parameters HRH-5 Functions: Supply terminals: Voltage range: Input: Toleration of voltage range: Measuring circuit Sensitivity ( input resistance): Voltage n electrodes: Current in probes: Time response: Max. capacity of probe cable: Time delay (t): Time delay after switching on (t1): Accuracy Accuracy in setting (mechanical): Output Number of contacts: Current rating: Switching voltage: Switched voltage: Min. switched output DC: Mechanical life (AC1): Electrical life: Other information Operational temperature: Storing temperature: Electrical strenght: Operational position: Mounting: Protection degree: Overvltage category: Pollution degree: Profile of connecting wires (mm2): Dimensions: Weight: Standards: Recommended measuring probes: 2 A1 - A2 24... 240 V AC/ DC (AC 50 - 60 Hz) max. 2 VA -15 %; +10 % adjustable in range 5 kΩ -100 kΩ max. AC 3.5 V AC <0.1 mA max. 400 ms 800 nF (sensitivity 5kΩ), 100 nF (sensitivity 100 kΩ) adjustable, 0.5 -10 sec 1.5 sec ±5% 1x changeover/ SPDT (AgNi / Silver Alloy ) 8 A / AC1 2500 VA , 240 W 250 V AC1 / 24 V DC 500 mW 1x107 1x105 Device description Supply voltage terminals Terminals for conection of probes H, D Indication of supply voltage Choice of function Output indication Sensitivity setting of probe Choice of function Adjustment of delay on output Terminal for connection of probe C Output contacts Connection Monitoring of two levels Monioring of one level Un A1 16 18 C D H A2 15 Un A1 A2 A1 A2 H D H D 16 C 15 18 max max -20 °C to +55 °C (-4 °F to 131 °F) -30 °C to +70 °C (-22 °F to 158 °F) 3.75 kV (supply - sensors) any DIN rail EN 60715 IP 40 from font panel / IP 10 terminals III. 2 AWG 10 (2.5 mm2) 90 x 17.6 x 64 mm (3.5˝ x 0.7˝ x 2.5˝) 72 g (2.5 oz.) EN 60255-6, EN 61010-1 see pg. 98 Symbol 94 8A/250V AC1 DIN rail min Tank with monitored level 16 C 15 18 Tank with monitored level Function Function PUMP UP Function PUMP DOWN Un max level min 15-18 red LED Un max level min t t 15-18 t t red LED Relay is designated for monitoring of levels of conductive liquids with possibility of functions: PUMP UP or PUMP DOWN. To prevent polarization and liquid electrolysis of liquid, and undesirable oxidation of measuring probes, alternating current is used. For measuring use three measuring probes: H- upper level, D- lower level, C - common probe. In case you use a tank made of a conductive material, you can use it as probe C. In case you require monitoring of one level only, it is neccessary to connect inputs H and D and connect them to one probe - in this case sensitivity is lowered by half (2.5... 50kΩ). Probe C can be connected with a protective wire of supply system (PE). To prevent undesirable switching out output contacts by various influences (sediment on probes, humidity...) it is possible to set sensitivity of the device according to conductivity of monitored liguid (corresponding to “resistance” of liquid) range 5 up to 100kΩ. To reduce infuences of undesirable switching of output contacts by liquid gorgle in tanks, it is possible to set delay of output reaction 0.5 - 10s.