Liquid level monitoring relay CM-ENS.2x

Data sheet Liquid level monitoring relay CM-ENS.2x The CM-ENS.2x is served to regulate and control liquid levels and ratios of mixtures of conductive fluids. It can be used for overflow protection, dry running protection, filling or draining applications as well as max- and min- level alarming. Suitable electrodes are available as accessories. The device is available with two different terminal versions. You can choose between the proven screw connection technology (double-chamber cage connection terminals) and the completely tool-free Easy Connect Technology (push-in terminals). 2CDC 251 003 V0015 Characteristics Devices with wide range power supply 24-240 V AC/DC Cascadable High EMC immunity Adjustable response sensitivity 0.1-1000 kω Control of one or two liquid levels (min/max) Fill (UP) or Drain (DOWN), adjustable via front-face potentiometer 3 LEDs for the indication of operational states Screw connection technology or Easy Connect Technology available Housing material for highest fire protection classification UL 94 V-0 Tool-free mounting and demounting on DIN rail 22.5 mm (0.89 in) width Approvals A UL 508, CAN/CSA C22.2 No.14 C GL (pending) R EAC L RMRS (pending) E CCC T DNV (pending) Marks a b CE RCM Order data Type Rated control supply voltage Output contacts Connection technology Order code CM-ENS.21S 24-240 V AC/DC 1 c/o (SPDT) contact Screw connection 1SVR730850R0200 CM-ENS.23S 110-130 / 220-240 V AC 1SVR730850R2200 CM-ENS.21P 24-240 V AC/DC Push-in connection 1SVR740850R0200 CM-ENS.23P 110-130 / 220-240 V AC 1SVR740850R2200

Connection technology Maintenance free Easy Connect Technology with push-in terminals CM-ENS.2xP Approved screw connection technology with double-chamber cage connection terminals CM-ENS.2xS 2CDC 253 026 F0011 2CDC 253 025 F0011 Push-in terminals Tool-free connection of rigid and flexible wires with wire end ferrule according to DIN 46228-1-A, DIN 46228-4-E Wire size: 2 x 0.5-1.5 mm², (2 x 20-16 AWG) Easy connection of flexible wires without wire end ferrule by opening the terminals No retightening necessary One operation lever for opening both connection terminals For triggering the lever and disconnecting of wires you can use the same tool (Screwdriver according to DIN ISO 2380-1 Form A 0.8 x 4 mm (0.0315 x 0.157 in), DIN ISO 8764-1 PZ1 ø 4.5 mm (0.177 in)) Constant spring force on terminal point independent of the applied wire type, wire size or ambient conditions (e. g. vibrations or temperature changes) Opening for testing the electrical contacting Gas-tight Double-chamber cage connection terminals Terminal spaces for different wire sizes: fine strand with/without wire end ferrule: 1 x 0.5-2.5 mm² (2 x 20-14 AWG), 2 x 0.5-1.5 mm² (2 x 20-16 AWG) rigid: 1 x 0.5-4 mm² (1 x 20-12 AWG), 2 x 0.5-2.5 mm² (2 x 20-14 AWG) One screw for opening and closing of both cages Pozidrive screws for pan- or crosshead screwdrivers according to DIN ISO 2380-1 Form A 0.8 x 4 mm (0.0315 x 0.157 in), DIN ISO 8764-1 PZ1 ø 4.5 mm (0.177 in) Both the Easy Connect Technology with push-in terminals and screw connection technology with double-chamber cage connection terminals have the same connection geometry as well as terminal position. 2 - Liquid level monitoring relay CM-ENS.2x Data sheet

Functions Operating controls 1 Adjustment of the function Fill Drain 2 Indication of operational states with LEDs U: green LED - Status indication of control supply voltage V Control supply voltage applied 2CDC 251 003 V0015 1 2 3 4 5 R: yellow LED - Status indication of the output relays V energized MIN/MAX: yellow LED - Status indication of the electrodes V MIN and MAX wet W MIN wet 3 Adjustment of the response sensitivity range 4 Adjustment of the response sensitivity 5 Marker label Application / Monitoring function The liquid level monitoring relay CM-ENS monitors and controls the liquid level and ratios of mixtures of conductive fluids. It is used for filling and draining applications, to protect pumps against dry-running, tanks against overflow and for signalization of the status of the monitored liquid level. Application example 1SVC 110 000 F0161 1SVC 110 000 F0162 Liquid level control - fill - selected function " " (UP) Liquid level control - drain - selected function " " (DOWN) Data sheet Liquid level monitoring relay CM-ENS.2x - 3

Operating mode with three electrodes The CM-ENS.2x measures the electrical resistance of the liquid between two immersion electrodes and a reference electrode. The function fill ( ) or drain ( ) can be selected via a front-face potentiometer. If the fill function is selected, the output relay is energized until the MAX-electrode becomes wet. Then it is de-energized and not re-energized until the MINelectrode becomes dry. If the drain function is selected, the output relay energizes as soon as the MAX-electrode becomes wet. It remains energized until the liquid level has dropped below the MIN-electrode. 2CDC 252 013 F0015 Operation with three electrodes Operating mode with two electrodes If only one level should be controlled, only the MAX-electrode shall be connected at the monitoring relay (see picture Operation with two electrodes). If the fill function ( ) is selected, the output relay is energized as long as the MAX-electrode is dry and it returns to the original state once the MAX-electrode gets in contact with the monitored medium. If the drain function ( ) is selected, the output relay is energized as long as the MAX-electrode is wet and it returns to the original state once the MAX-electrode is no longer in contact with the monitored medium. 2CDC 252 073 F0004 Operation with two electrodes 4 - Liquid level monitoring relay CM-ENS.2x Data sheet

Cascading of several devices With the CM-ENS.2x it is possible to use two devices in one tank. This enables, to realize a pre-warning with additional electrodes. In this way, two additional alarm outputs for exceeding or dropping below the normal level can be implemented in addition to the filling levels MAX and MIN. Also reserve pump can be connected to the additional device. Pump control Alarm, empty Pump control Reserve pump for filling Device A Device B Device A Device B C MAX MIN C MAX MIN C MAX MIN C MAX MIN Control pump Alarm 2CDC 252 015 F0215 Control pump Reserve pump 2CDC 252 016 F0215 Fillling with alarm empty Filling with reserve pump Pump control Alarm, full Pump control Reserve pump for draining Device A Device B Device A Device B C MAX MIN C MAX MIN C MAX MIN C MAX MIN Control pump Alarm 2CDC 252 017 F0215 Control pump Reserve pump 2CDC 252 018 F0215 Draining with alarm full Draining with reserve pump Electrical connection A1 11 C MAX MIN C MAX MIN 11 A1 A2 12 14 14 12 A2 2CDC 252 006 F0015 A1 A2 Control supply voltage 11 12/14 1 c/o (SPDT) contact C Reference electrode MAX Maximum level electrode MIN Minimum level electrode Connection diagram CM-ENS.21 A1 11 A3 C MAX MIN C MAX MIN 11 A1 A3 A2 12 14 14 12 A2 2CDC 252 005 F0015 A1 A2 Control supply voltage 220-240 V AC A3-A2 Control supply voltage 110-130 V AC 11 12/14 1 c/o (SPDT) contact C Reference electrode MAX Maximum level electrode MIN Minimum level electrode Connection diagram CM-ENS.23 Data sheet Liquid level monitoring relay CM-ENS.2x - 5

Function diagrams A1-A2/A2-A3 Liquid level max. min. 11-14 11-12 U: green LED R: yellow LED MIN/MAX: yellow LED 2CDC 252 004 F0015 Drain CM-ENS.x A1-A2/A2-A3 max. min. Liquid level 11-14 11-12 U: green LED R: yellow LED MIN/MAX: yellow LED 2CDC 252 003 F0015 Fill CM-ENS.x 6 - Liquid level monitoring relay CM-ENS.2x Data sheet

Technical data Data at T a = 25 C and rated values, unless otherwise indicated Input circuit Type Supply circuit Rated control supply voltage U s CM-ENS.21: A1-A2 24-240 V AC/DC CM-ENS.23: A1-A2 220-240 V AC CM-ENS.23: A3-A2 110-130 V AC Rated control supply voltage U s tolerance -15...+10 % Rated frequency 50/60 Hz Frequency range 47-63 Hz Typical current / power consumption 24 V AC 25 ma / 0.6 W 110-130 V AC 20 ma / 2.6 VA 220-240 V AC 8.5 ma / 2.1 VA 24-240 V AC/DC 11 ma / 2.6 VA Power failure buffering time min. 20 ms Start-up time t s Range 0.1-1 kω max. 900 ms Range 1-10 kω max. 900 ms Range 10-100 kω max. 1.3 s Range 100-1000 kω max. 6.3 s CM-ENS.2x Measuring circuit MAX-MIN-C Sensor type electrode Monitoring functions fill or drain, selectable Measuring principle conductivity measurement Number of electrodes 3 Response sensitivity adjustable: 0.1-1000 kω Maximum electrode voltage 6 V AC Maximum electrode current 2 ma Electrode supply line max. cable capacity max. cable length Range 0.1-1 kω 200 nf 1000 m Range 1-10 kω 200 nf 1000 m Range 10-100 kω 20 nf 100 m Range 100-1000 kω 4 nf 20 m Max. measuring cycle Range 0.1-1 kω 700 ms Range 1-10 kω 700 ms Range 10-100 kω 1.1 s Range 100-1000 kω 5 s User interface Indication of operational states Control supply voltage U Green LED Output relay energized R Yellow LED Electrode / alarm status MAX/MIN Yellow LED Data sheet Liquid level monitoring relay CM-ENS.2x - 7

Output circuits Kind of output 11-12/14 relay, 1 c/o (SPDT) contact Operating principle open- or closed-circuit principle (selectable) Contact material AgNi alloy, Cd free Rated operational voltage U e (IEC/EN 60947-1) 250 V AC Minimum switching voltage / Minimum switchting current 12 V / 10 ma Maximum switchting voltage / Maximum switching current See Load limit curves on page 10 Rated operational current I e AC-12 (resistive) at 230 V 4 A (IEC/EN 60947-5-1) AC-15 (inductive) at 230 V 3 A DC-12 (resistive) at 24 V 4 A DC-13 (inductive) at 24 V 2 A AC rating (UL 508) Utilization category (Control Circuit Rating Code) B 300, pilot duty general purpose (250 V, 4 A, cos ϕ 0.75) max. rated operational voltage 300 V AC max. continuous thermal current at B 300 5 A max. making/breaking apparent power at B 300 3600/360 VA Mechanical lifetime 10 x 10 6 switching cycles Electrical lifetime AC12, 230 V, 4 A 0.1 x 10 6 switching cycles Maximum fuse rating to achieve n/c contact 6 A fast-acting short-circuit protection n/o contact 10 A fast-acting Conventional thermal current I th acc. IEC/EN 60947-1 4 A General data MTBF on request Duty time 100 % Dimensions (W x H x D) product dimensions 22.5 x 85.6 x 103.7 mm (0.89 x 3.37 x 4.08 in) packaging dimensions 30 x 97 x 109 mm (1.18 x 3.82 x 4.29 in) Weight Screw connection technology Easy Connect Technology (push-in) net weight CM-ENS.21 0.125 kg (0.276 lb) 0.117 kg (0.258 lb) CM-ENS.23 0.154 kg (0.340 lb) 0.147 kg (0.324 lb) gross weight CM-ENS.21 0.150 kg (0.331 lb) 0.142 kg (0.313 lb) CM-ENS.23 0.179 kg (0.395 lb) 0.172 kg (0.379 lb) Mounting Mounting position DIN rail (IEC/EN 60715), snap-on mounting without any tool any Minimum distance to other units CM-ENS.21: not necessary CM-ENS.23: 10 mm if contact current > 2 A Material of housing UL 94 V-0 Degree of protection housing IP50 terminals IP20 Electrical connection Screw connection technology Easy Connect Technology (push-in) Wire size fine strand with(out) 1 x 0.5-2.5 mm² (1 x 20-14 AWG) 2 x 0.5-1.5 mm² wire end ferrule 2 x 0.5-1.5 mm² (2 x 20-16 AWG) (2 x 20-16 AWG) rigid 1 x 0.5-4 mm² (1 x 20-12 AWG) 2 x 0.5-1.5 mm² 2 x 0.5-2.5 mm² (2 x 20-14 AWG) (2 x 20-16 AWG) Stripping length 8 mm (0.32 in) Tightening torque 0.6-0.8 Nm (5.31-7.08 lb.in) - Environmental data Ambient temperature ranges operation -25...+60 C storage -40...+85 C Damp heat, cyclic (IEC/EN 60068-2-30) 6 x 24 h cycle, 55 C, 95 % RH Climatic class (IEC/EN 60721-3-3) 3K5 (no condensation, no ice formation) Vibration, sinusoidal (IEC/EN 60255-21-1) Class 2 Shock, half-sine (IEC/EN 60255-21-2) Class 2 8 - Liquid level monitoring relay CM-ENS.2x Data sheet

Standards Product standard IEC/EN 60255-1 Other standards EN 50178, IEC/EN 60204 Low Voltage Directive 2006/95/EC EMC Directive 2004/108/EC RoHS Directive 2011/65/EC Isolation data Type Rated impulse withstand supply circuit / measuring circuit 4 kv voltage U imp between all isolated circuits supply circuit / output circuits 4 kv (IEC/EN 60947-1, IEC/EN 60664-1) measuring circuit / output circuits 4 kv output circuit 1 / output circuit 2 4 kv Pollution degree (IEC/EN 60664-1) 3 Overvoltage category (IEC/EN 60664-1) III Rated insulation voltage U i (IEC/EN 60947-1, IEC/EN 60664-1) Basis isolation for rated control supply voltage (IEC/EN 60664-1) Protective separation (IEC/EN 61140, EN 50178) Test voltage between all isolated circuits, routine test (IEC/EN 60255-5) Test voltage between all isolated circuits, type test (IEC/EN 60255-5) supply circuit / measuring circuit 300 V supply circuit / output circuits 300 V measuring circuit / output circuits 300 V output circuit 1 / output circuit 2 300 V supply circuit / measuring circuit 250 V AC / 300 V DC supply circuit / output circuits 250 V AC / 300 V DC measuring circuit / output circuits 250 V AC / 300 V DC output circuit 1 / output circuit 2 250 V AC / 300 V DC supply circuit / measuring circuit 250 V AC / 300 V DC supply circuit / output circuits 250 V AC / 300 V DC measuring circuit / output circuits 250 V AC / 300 V DC supply circuit / measuring circuit 2.0 kv, 50 Hz, 1 s supply circuit / output circuits 2.0 kv, 50 Hz, 1 s measuring circuit / output circuits 2.0 kv, 50 Hz, 1 s supply circuit / measuring circuit 2.0 kv, 50 Hz, 1 s supply circuit / output circuits 2.0 kv, 50 Hz, 1 s measuring circuit / output circuits 2.0 kv, 50 Hz, 1 s Electromagnetic compatibility Type Interference immunity to EN 61000-6-1, EN 61000-6-2, EN60255-26 electrostatic discharge IEC/EN 61000-4-2 Level 3 (6 kv / 8 kv) radiated, radio-frequency, IEC/EN 61000-4-3 Level 3 (10 V/m) electromagnetic field electrical fast transient / burst IEC/EN 61000-4-4 Level 3, 2 KV / 5 khz surge IEC/EN 61000-4-5 Level 3, installation class 3, supply circuit and measuring circuit 1 kv L-L, 2 kv L-earth conducted disturbances, induced by IEC/EN 61000-4-6 Level 3, 10 V radio-frequency fields voltage dips, short interruptions and IEC/EN 61000-4-11 Class 3 voltage variations Interference emission IEC/EN 61000-6-3, IEC/EN 61000-6-4 high-frequency radiated IEC/CISPR 22, EN 55022 CM-ENS.21: Class A, CM-ENS.23: Class B high-frequency conducted IEC/CISPR 22, EN 55022 CM-ENS.21: Class A, CM-ENS.23: Class B Data sheet Liquid level monitoring relay CM-ENS.2x - 9

Technical diagrams Load limit curves V V 300 200 100 80 60 50 40 30 20 10 0.1 0.2 0.5 resistive load 1 2 4 6 10 I A 2CDC 252 194 F0205 V V 300 200 100 80 60 50 40 30 20 10 0.1 0.2 0.5 resistive load 1 2 4 6 10 I A 2CDC 252 193 F0205 AC load (resistive) DC load (resistive) 1.0 0.9 Switching cycles 250 V resistive load F 0.8 0.7 0.6 0.5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 cos ϕ 2CDC 252 192 F0205 Switching current [A] 2CDC 252 148 F0206 Reduction factor F for inductive AC load Contact life time / number of operations N 220 V 50 Hz 1 AC, 360 operations/h 10 - Liquid level monitoring relay CM-ENS.2x Data sheet

Dimensions in mm and inches 113.4 4.47 105.9 4.17 22.5 0.89 85.6 3.37 103.7 4.08 2CDC 252 009 F0011 Accessories in mm and inches 22.5 0.89 8 0.32 4.8 0.19 6.5 0.256 62.5 2.461 60 2.362 70 2.756 10 11.5 0.394 0.453 20 0.787 2CDC 252 008 F0010 22.2 0.874 4T22 19.9 0.783 7.85 0.309 2CDC 252 020 F0011 68 2.68 front to back 110.5 4.31 2CDC 252 010 F0011 ADP.01 Adapter for screw mounting MAR.12 Marker label for devices with DIP switches COV.11 Sealable transparent cover Further documentation Document title Document type Document number Electronic products and relays Technical catalogue 2CDC 110 004 C02xx Operating and installation instructions CM-ENS Instruction manual 1SVC 730 680 M0000 You can find the documentation on the internet at http://new.abb.com/low-voltage/products/epr/monitors/liquid-level-monitoring-relays CAD system files You can find the CAD files for CAD systems at http://abb-control-products.partcommunity.com/portal/portal/abb-control-products -> Low Voltage Products & Systems -> Control Products -> Electronic Relays and Controls -> Liquid Level Monitoring Relays. Data sheet Liquid level monitoring relay CM-ENS.2x - 11

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