2cdc 251 059 v0011 data sheet voltage monitoring relay cm- efs.2 for single-phase ac/dc voltages the cm-efs.2 is an electronic voltage monitoring relay that provides reliable monitoring of voltages as well as detection of phase loss. all devices are 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). characteristics C monitoring of dc and ac voltages (3-600 v) C trms measuring principle C one device includes 4 measuring ranges C over- and undervoltage monitoring C on- or off-delay confgurable C latching function confgurable C threshold values for >u and u and 2 - voltage monitoring relay cm-efs.2 | data sheet connection technology maintenance free easy connect technology with push-in terminals type designation cm-xxs.yyp approved screw connection technology with double-chamber cage connection terminals type designation cm-xxs.yys push-in terminals C tool-free connection of rigid and fexible 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) C easy connection of fexible wires without wire end ferrule by opening the terminals C no retightening necessary C one operation lever for opening both connection terminals C 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 ? 4.5 mm (0.177 in)) C constant spring force on terminal point independent of the applied wire type, wire size or ambient conditions (e. g. vibrations or temperature changes) C opening for testing the electrical contacting C gas-tight double-chamber cage connection terminals C terminal spaces for different wire sizes: fne- 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) C one screw for opening and closing of both cages C 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 ? 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. 2cdc 253 025 f0011 2cdc 253 026 f0011
data sheet | voltage monitoring relay cm-efs.2 - 3 functions operating controls 2cdc 251 059 v0011 1 adjustment of the threshold value >u for overvoltage 2 adjustment of the threshold value u) for overvoltage, the threshold valuemin ( 4 - voltage monitoring relay cm-efs.2 | data sheet function diagrams voltage window monitoring 1x2 c/o (spdt) contacts j on-delayed a without latching e open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u) or drops below the threshold value min ( data sheet | voltage monitoring relay cm-efs.2 - 5 voltage window monitoring 1x2 c/o (spdt) contacts j off-delayed b without latching e open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u) or drops below the threshold value min ( 6 - voltage monitoring relay cm-efs.2 | data sheet voltage window monitoring 1x2 c/o (spdt) contacts j on-delayed a with latching f open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u) or drops below the threshold value min ( data sheet | voltage monitoring relay cm-efs.2 - 7 voltage window monitoring 1x2 c/o (spdt) contacts j off-delayed b with latching f open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u) or drops below the threshold value min ( 8 - voltage monitoring relay cm-efs.2 | data sheet voltage window monitoring 2x1 c/o (spdt) contact i on-delayed a without latching e open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u: 11-14 (15-18) 11-12 (15-16) u: 11-14 (15-18) 11-12 (15-16) data sheet | voltage monitoring relay cm-efs.2 - 9 voltage window monitoring 2x1 c/o (spdt) contact i off-delayed b without latching e open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u: 11-14 (15-18) 11-12 (15-16) u: 11-14 (15-18) 11-12 (15-16) 10 - voltage monitoring relay cm-efs.2 | data sheet voltage window monitoring 2x1 c/o (spdt) contact i on-delayed a with latching f open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u: 11-14 (15-18) 11-12 (15-16) u: 11-14 (15-18) 11-12 (15-16) data sheet | voltage monitoring relay cm-efs.2 - 11 voltage window monitoring 2x1 c/o (spdt) contact i off-delayed b with latching f open-circuit principle h the voltage to be monitored (measured value) is applied to terminals b-c. the control supply voltage applied to terminals a1-a2 is displayed by the glowing green led. if the measured value exceeds the threshold value max (>u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u) or drops below the threshold value min (u), or 21 25 -22 26 /24 28 (u), or 21 25 -22 26 /24 28 (u: 11-14 (15-18) 11-12 (15-16) u: 11-14 (15-18) 11-12 (15-16) 12 - voltage monitoring relay cm-efs.2 | data sheet electrical connection a1 a2 21 25 22 26 24 28 a1 11 15 21 25 b 24 28 22 26 a2 11 15 12 16 14 18 14 18 12 16 c b c 2cdc 252 207 f0005 a1-a2 rated control supply voltage b-c measuring ranges: 3-30 v, 6-60 v, 30-300 v, 60-600 v 11 15 -12 16 /14 18 output contacts - open- or closed-circuit principle 21 25 -22 26 /24 28 connection diagram dip switches closed open 2x1 c/o 1x2 c/o position 4 1 2 3 on off 2cdc 252 274 f0005 1 on off-delay off on-delay 2 on closed-circuit principle off open-circuit principle 3 on latching function activated off latching function not activated 4 on 2x1 c/o (spdt) contact off 1x2 c/o (spdt) contacts off = default
data sheet | voltage monitoring relay cm-efs.2 - 13 technical data data at t a = 25 c and rated values, unless otherwise indicated input circuits supply circuit a1-a2 rated control supply voltage u s 24-240 v ac rated control supply voltage u s tolerance -15...+10 % rated frequency 50/60 hz typical current / power consumption 24 v dc 30 ma / 0.75 w 115 v ac 17 ma / 1.9 va 230 v ac 11 ma / 2.6 va power failure buffering time 20 ms transient overvoltage protection varistors measuring circuit b-c monitoring function over- and undervoltage monitoring measuring method trms measuring principle measuring inputs terminal connection b-c measuring range 3-30 v, 6-60 v, 30-300 v, 60-600 v input resistance 600 k pulse overload capacity t < 1 s 800 v continuous capacity 660 v threshold value >u and 14 - voltage monitoring relay cm-efs.2 | data sheet output circuits kind of output 11-12/14 21-22/24 relay, 1st c/o (spdt) contact relay, 2nd c/o (spdt) contact 1 x 2 c/o (spdt) contacts (common signal) or 2 x 1 c/o (spdt) contact (separate signal for >u and data sheet | voltage monitoring relay cm-efs.2 - 15 electrical connection screw connection technology easy connect technology (push-in) wire size fine- strand with(out) wire end ferrule 1 x 0.5-2.5 mm2 (1 x 20-14 awg) 2 x 0.5-1.5 mm2 (2 x 20-16 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) 2 x 0.5-1.5 mm2 (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 -20...+60 c storage -40...+85 c damp heat, cyclic (iec 60068-2-30) 55 c, 6 cycle vibration, sinusoidal (iec/en 60255-21-1) class 2 shock (iec/en 60255-21-2) class 2 isolation data rated insulation voltage u i (vde 0110, iec/en 60947-1, iec/en 60255-5) supply / measuring circuit / output 600 v supply / output 1 / output 2 250 v rated impulse withstand voltage u imp (iec/en 60947-1, iec/en 60255-5) supply / measuring circuit / output 6 kv 1.2/50 s supply / output 1 / output 2 4 kv 1.2/50 s test voltage between all isolated circuits (type test) rated insulation voltage 250 v 2.0 kv, 50 hz rated insulation voltage 600 v 2.5 kv, 50 hz pollution degree (vde 0110, iec/en 60664, iec/en 60255-5) 3 overvoltage category (vde 0110, iec/en 60664, iec/en 60255-5) iii standards product standard iec/en 60255-6 low voltage directive 2006/95/ec emc directive 2004/108/ec rohs directive 2002/95/ec electromagnetic compatibility interference immunity to iec/en 61000-6-2 electrostatic discharge iec/en 61000-4-2 level 3 radiated, radio-frequency, electromagnetic field iec/en 61000-4-3 level 3 electrical fast transient / burst iec/en 61000-4-4 level 3 surge iec/en 61000-4-5 level 3 conducted disturbances, induced by radio-frequency fields iec/en 61000-4-6 level 3 interference emission iec/en 61000-6-3 high-frequency radiated iec/cispr 22, en 55022 class b high-frequency conducted iec/cispr 22, en 55022 class b
16 - voltage monitoring relay cm-efs.2 | data sheet technical diagrams load limit curves 300 200 100 80 60 50 40 30 20 10 12 46 10 ia v v 0.1 0.2 0.5 r esistive load 2cdc 252 194 f0205 ac load (resistive) 300 200 100 80 60 50 40 30 20 10 1 2 4 6 10 ia v v 0.1 0.2 0.5 r esistive load 2cdc 252 193 f0205 dc load (resistive) cos ? f 0.5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.6 0.7 0.8 0.9 1 . 0 2cdc 252 192 f0205 derating factor f for inductive ac load switching curr ent [a] switching cycles 250 v re sistive load 2cdc 252 148 f0206 contact lifetime
data sheet | voltage monitoring relay cm-efs.2 - 17 dimensions in mm and inches 113.4 4.47? 22.5 0.89? 85.6 3.37? 103.7 4.08? 105.9 4.17? 2cdc 252 009 f0011 accessories in mm and inches 22.5 0.89? 68 2.68? 110.5 4.31? 8 0.32? 4.8 0.19? front to back 2cdc 252 010 f0011 6.5 62.5 60 10 11.5 20 0.256? 2.461? 2.362? 70 2.756? 0.394? 0.787? 0.453? 2cdc 252 008 f0010 19.9 4t22 7.85 0.309? 0.783? 22.2 0.874? 2cdc 252 020 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 c020x cm-efs.2 instruction manual 1svc 730 570 m0000 you can find the documentation on the internet at www.abb.com/lowvoltage -> control products -> electronic relays and controls -> single phase monitors
abb stotz?kontakt gmbh p. o. box 10 16 80 69006 heidelberg, germany phone: +49 (0) 6221 7 01-0 fax: +49 (0) 6221 7 01-13 25 e-mail: info.desto@de.abb.com you can find the address of your local sales organisation on the abb home page http://www.abb.com/contacts -> low voltage products and systems contact us note: we reserve the right to make technical changes or modify the contents of this document without prior notice. with regard to purchase orders, the agreed particulars shall prevail. abb ag does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. we reserve all rights in this document and in the subject matter and illustrations contained therein. any reproduction, disclosure to third parties or utilization of its contents C in whole or in parts C is forbidden without prior written consent of abb ag. copyright? 2010 abb all rights reserved document number 2cdc 112 174 d0201 (11.2011)
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