1 monitoring technique ? 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 level sensing relay mk 9151 varimeter mk 9151 / 22.04.04 d function diagrams circuit diagrams mk 9151.11 mk 9151.12 1-point level control 2-point level control approvals and marking notes 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. green led: on, when supply connected yellow led: on, when output relay active indicators application ? 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 0221581 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. level / niveau max 0 supply u h 11-14 11-14 11-12 11-12 com com x1 x1 m6620_d ttt ttt level / niveau max min 0 supply u h 11-14 11-14 11-12 11-12 com com x1 x1 m6621_f tt t tt t x1 x2 a2 min max com a1 m7659_a a1 11 max min com x1 x2 14 12 a2 11 14 12 x1 com a2 min max a1 m7660_a a1 11 21 max min com 24 22 x1 14 12 a2 11 21 14 24 12 22 canada / usa * * see variants
2 technische daten wire connection: 2 x 1,5 mm 2 solid or 2 x 1,0 mm 2 stranded wire with sleeve din 46 228-1/-2/-3/-4 wire fixing: flat terminals with self-lifting clamping piece iec/en 60 999-1 mounting: din rail iec/en 60 715 weight: 155 g dimensions width x height x depth: 22,5 x 82 x 99 mm input setting range of the fluid resistance: 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 u h : ac 24, 42 ... 48, 110 ... 127, 220 ... 240, 380 ... 415 v dc 24 v voltage range of u h ac: 0,8 ... 1,1 u n dc: 0,85 ... 1,25 u n nominal power consumption ac: approx. 2 va dc: approx. 1 w frequency range: 45 ... 400 hz output contacts mk 9151.11: 1 changeover contact mk 9151.12: 2 changeover contacts thermal current i th : 5 a switching capacity to ac 15 no contact: 3 a / ac 230 v iec/en 60 947-5-1 nc contact: 1 a / ac 230 v iec/en 60 947-5-1 electrical life iec/en 60 947-5-1 to ac 15 at 1 a, ac 230 v: 5 x 10 5 switching cycles permissible operating: 6 000 switching cycles / h short-circuit strength max. fuse rating: 4 a gl iec/en 60 947-5-1 mechanical life: 30 x 10 6 switching cycles general data operating mode: continuous operation temperature range: - 20 ... + 60 c clearance and creepage distances overvoltage category / contamination level iec 60 664-1 input/auxiliary circuit: 6 kv / 2 (1 kv for dc 24 v-devices) input/output circuit: 6 kv / 2 (4 kv for mk 9151.12) auxiliary/output circuit: 4 kv / 2 emc electrostatic discharge: 8 kv (air) iec/en 61 000-4-2 hf irradiation: 10 v / m iec/en 61 000-4-3 fast transients: 2 kv iec/en 61 000-4-4 surge voltages: 1 kv iec/en 61 000-4-5 interference suppression: limit value class b en 55 011 degree of protection: housing: ip 40 iec/en 60 529 terminals: ip 20 iec/en 60 529 housing: thermoplastic with v0 behavior according to ul subject 94 vibration resistance: amplitude 0,35 mm, frequency 10 ... 55 hz, iec/en 60 068-2-6 climate resistance: 20 / 060 / 04 iec/en 60 068-1 terminal designation: en 50 005 technical data accessories oa 5640: standard probe mk 9151._ _/60 csa approval mk 9151. _ _ /001: time delay on min level mk 9151. _ _ /002: time delay on max level mk 9151. _ _ /400: with sealable transparent cover mk 9151. _ _ /106: 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 variants mk 9151.11 2 ... 450 k ? ac 220 ... 240 v article number: 0044505 stock item ? output: 1 changeover contact ? measuring range: 2 ... 450 k ? ? auxiliary voltage u h : ac 220 ... 240 v ? width: 22,5 mm standard type applications level/niveau min a1 supply u a2 h max 12 11 14 22 21 24 com x1 m6612 12 22 14 24 11 21 1-point level control level/niveau min a1 supply u a2 h max 12 11 14 22 21 24 com x1 m6613 12 22 14 24 11 21 2-point level control e. dold & s?hne 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
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