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| Monitoring technique Level sensing relay MK 9151 varimeter * * * * * * * * * * * * * * * According to IEC/EN 60 255, DIN VDE 0435-303 3 probe connections for 2-point and 1-point level control Also for use as moisture detector High interference resistance of the measuring circuit, which is isolated from the mains Max. wire length to the probes: 1500 m Large setting range: 2 ... 450 k this permits differentiation between fluid and foam Adjustable response and release time delay: 0,2 ... 20 s Programmable for open circuit operation (without bridge) or closed circuit operation(bridge X1-X2 or X1-COM) For auxiliary voltages of 24 ... 415 V AC or 24 V DC Green LED for operation Yellow LED for contact position 1 or 2 changeover contacts Also available with sealable transparent cover Available with safe separation according to IEC/EN 61 140, IEC/EN 60 947-1 Width 22,5 mm Approvals and marking 0221581 Function diagrams Supply UH 0 Level / Niveau MAX * Canada / USA * see variants COM X1 11 - 14 11 - 12 11 - 14 11 - 12 Application t t t COM X1 t t t M6620_d * Level monitoring and control for conductive liquids and powders, e.g. maximum and minimum filling levels, overfilling and protection against dry running * Monitoring and control of the mixing ratio of conductive liquids * General resistance monitoring tasks, e.g. limit temperature detection with PTC Indicators 1-point level control Supply UH 0 Level / Niveau MAX MIN green LED: yellow LED: Notes on, when supply connected on, when output relay active All commercially available probes are suitable. The reference probe for level measurement is generally located at the lowest point of the container and must always be connected to the "COM" terminal. The container itself can be used as a reference probe if it consists of conductive material. 1-point level control (see Figure) is especially suitable for protection against overfilling and dry running on containers with a free inlet/outlet. In this configuration, all that is required besides the reference probe "COM" is the "MAX", which must be located at the desired limit level. The output relay switches over after the set delay time if the fluid level exceeds or falls below the limit level, which permits fluid to be pumped out or added. COM X1 11 - 14 11 - 12 11 - 14 11 - 12 t t t COM X1 t t t M6621_f 2-point level control Circuit diagrams A1 11 MIN MAX COM A1 11 21 MIN MAX COM A2 X1 X2 11 A2 X1 COM 11 21 A1 MIN MAX COM X1 X2 12 14 A1 MIN MAX 12 14 22 24 22 24 X1 M7659_a 12 14 A2 M7660_a 12 14 A2 MK 9151.11 MK 9151.12 All technical data in this list relate to the state at the moment of edition. We reserve the right for technical improvements and changes at any time. 1 MK 9151 / 22.04.04 d Technical data Input Setting range of the fluid resistance: Technische Daten Wire connection: 2 x 1,5 mm2 solid or 2 x 1,0 mm2 stranded wire with sleeve DIN 46 228-1/-2/-3/-4 Flat terminals with self-lifting clamping piece IEC/EN 60 999-1 DIN rail IEC/EN 60 715 155 g 2 ... 450 k (other ranges on request) Setting: on logarithmically divided absolute scale Switching point hysteresis: approx. 3 % (at 450 k) ... 6 % (at 2 k) of the set value Voltage and temperature influence: < 2 % of the set value Max. cable length to the probes: Set value Cable length (at 100 nF/km) 450 k 50 m 100 k 200 m 35 k 500 m 10 k 1500 m 5 k 3000 m Max. sensing voltage: approx. AC 10 V Max. sensing current: approx. AC 1,5 mA (internally generated) Response and release times: 0,2 ... 20 s Setting on logarithmically-divided absolute scale Auxiliary circuit Auxiliary voltage UH: AC 24, 42 ... 48, 110 ... 127, 220 ... 240, 380 ... 415 V DC 24 V Voltage range of U H AC: 0,8 ... 1,1 UN DC: 0,85 ... 1,25 UN Nominal power consumption AC: approx. 2 VA DC: approx. 1 W Frequency range: 45 ... 400 Hz Output Contacts MK 9151.11: MK 9151.12: Thermal current I th : Switching capacity to AC 15 NO contact: NC contact: Electrical life to AC 15 at 1 A, AC 230 V: Permissible operating: Short-circuit strength max. fuse rating: Mechanical life: General data Operating mode: Temperature range: Clearance and creepage distances overvoltage category / contamination level input/auxiliary circuit: input/output circuit: auxiliary/output circuit: EMC Electrostatic discharge: HF irradiation: Fast transients: Surge voltages: Interference suppression: Degree of protection: Housing: Vibration resistance: Climate resistance: Terminal designation: Continuous operation - 20 ... + 60C Wire fixing: Mounting: Weight: Dimensions Width x height x depth: Standard type 22,5 x 82 x 99 mm MK 9151.11 2 ... 450 k AC 220 ... 240 V Article number: 0044505 * Output: 1 changeover contact * Measuring range: 2 ... 450 k * Auxiliary voltage UH: AC 220 ... 240 V * Width: 22,5 mm Variants MK 9151._ _/60 MK 9151. _ _ /001: MK 9151. _ _ /002: MK 9151. _ _ /400: MK 9151. _ _ /106: stock item CSA approval time delay on Min level time delay on Max level with sealable transparent cover with save separation according to VDE 0106 Ordering example for Variants MK 9151 .12 /_ _ _ 2 ... 450 k AC 220 ... 240 V Auxiliary voltage Measuring range Variant, if required Contacts Type Accessories OA 5640: Applications Standard probe 1 changeover contact 2 changeover contacts 5A 3 A / AC 230 V 1 A / AC 230 V IEC/EN 60 947-5-1 IEC/EN 60 947-5-1 IEC/EN 60 947-5-1 5 x 105 switching cycles 6 000 switching cycles / h 4 A gL IEC/EN 60 947-5-1 30 x 106 switching cycles A1 Supply U H A2 MIN 12 11 14 12 14 11 MAX COM 22 21 24 22 24 21 X1 Level/Niveau M6612 1-point level control IEC 60 664-1 (1 kV for DC 24 V-devices) (4 kV for MK 9151.12) A1 Supply U H A2 MIN MAX 12 11 14 12 14 11 COM 22 21 24 22 24 21 X1 6 kV / 2 6 kV / 2 4 kV / 2 8 kV (air) IEC/EN 61 000-4-2 10 V / m IEC/EN 61 000-4-3 2 kV IEC/EN 61 000-4-4 1 kV IEC/EN 61 000-4-5 Limit value class B EN 55 011 Housing: IP 40 IEC/EN 60 529 Terminals: IP 20 IEC/EN 60 529 Thermoplastic with V0 behavior according to UL subject 94 Amplitude 0,35 mm, frequency 10 ... 55 Hz, IEC/EN 60 068-2-6 20 / 060 / 04 IEC/EN 60 068-1 EN 50 005 Level/Niveau M6613 2-point level control E. DOLD & SOHNE KG * D-78114 Furtwangen e-mail dold-relays@t-online.de * internet http://www.dold.com * Postf. 1251 * Tel. +49 7723 654 0 * Telefax +49 7723 654 356 2 |
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