Latching Relay MMK CSM_MMK_DS_E_5_2 Mechanically Latching Relays Based on the MM Power Relay • Low power consumption due to mechanical latch for economic operation. • Relays with mixed coil specifications can be produced (e.g., AC set coil and DC reset coil). • Operational response fast enough to enable pulse signal power applications. • Ambient operating temperature: –10°C to 55°C. Refer to Safety Precautions for All Relays. Ordering Information Type Contact form Open structure Solder terminals Standard Cased Screw terminals Plug-in (octal pins) terminals DPDT MM2K MM2KB MM2KP 3PDT MM3K MM3KB MM3KP 4PDT MM4K MM4KB --- DPDT+DPST-NO --- --- MM4KP DPDT MM2XK MM2XKB MM2XKP 3PDT MM3XK MM3XKB MM3XKP 4PDT MM4XK MM4XKB --- DPDT+DPST-NO --- --- MM4XKP Conforming to auxiliary power DPDT+DPST-NO relay specifications --- --- MM4KP-JD MM4XKP-JD DC-switching Models Conforming to Auxiliary Power Relay Specifications The MM4KP-JD and MM4XKP-JD satisfy the ratings of auxiliary relays provided in JEC-2500 (1987) standards for power protective relays specified by the Japan Electromechanical Commission. Furthermore, the MM4KP-JD and MM4XKP-JD satisfy the ratings of multi-contact relays provided in JEC-174D (1979) standards for power auxiliary relays. These models work at operation level A specified by JEC-174D (1979) standards and the hot start of the relays is possible after the coils radiate heat. In accordance with JEC-2500 (1987) standards, the coil of each model withstands a 130% DC load or 115% AC load. Note: When ordering, add the rated coil voltage to the model number. Rated coil voltages are given in the coil ratings table. Example: MM2K, 6 VAC Rated coil voltage ■ Available Models Open Coils (with Solder Terminals) Type Standard DC-switching Contact form Relay model Available rated voltage DPDT MM2K 100/(110), 200/(220) VAC 12, 24, 48, 100/110, 200/220 VDC 3PDT MM3K 100/(110), 200/(220) VAC 48, 100/110 VDC 4PDT MM4K 200/(220) VAC 12, 24, 48, 100/110, 200/220 VDC DPDT MM2XK 24, 100/110 VDC 3PDT MM3XK 200/(220) VAC 100/110 VDC 4PDT MM4XK 100/(110) VAC 100/110 VDC 1 MMK Open Coils (with Screw Terminals) Type Standard DC-switching Contact form Relay model Available rated voltage DPDT MM2KB 100/(110), 200/(220) VAC 12, 24, 48, 100/110 VDC 3PDT MM3KB 100/(110), 200/(220) VAC 12, 48, 100/110 VDC 4PDT MM4KB 24, 100/(110), 200/(220) VAC 100/110 VDC DPDT MM2XKB 100/(110), 200/(220) VAC 12, 24, 48, 100/110, 200/220 VDC 3PDT MM3XKB 200/(220) VAC 24, 100/110 VDC 4PDT MM4XKB 24, 48, 100/110, 125, 200/220 VDC Cased Coils (Plug-in Terminals) Type Standard Contact form Relay model Available rated voltage DP MM2KP 6, 12, 24, 100/(110), 200/(220) VAC 12, 24, 48, 100/110, 125, 200/220 VDC 3P MM3KP 24, 100/(110), 200/(220) VAC 6, 12, 24, 48, 100/110, 125, 200/220 VDC 4P MM4KP 24, 100/(110), 200/(220) VAC 6, 12, 24, 48, 100/110, 125, 200/220 VDC DP MM2XKP 24, 100/(110), 200/(220) VAC 12, 24, 48, 100/110, 125, 200/220 VDC 3P MM3XKP 100/(110), 200/(220) VAC 24, 48, 100/110, 125, 200/220 VDC 4P MM4XKP 100/(110), 200/(220) VAC 6, 12, 24, 48, 100/110, 125, 200/220 VDC Conforming to auxiliary power relay specifications 4P MM4KP-JD 24, 100/(110), 115, 200/(220) VAC 24, 100/110, 125, 200/220 VDC Conforming to auxiliary power relay specifications for DC-switching 4P MM4XKP-JD 100/(110), 115, 200/(220) VAC 24, 48, 100/110, 125, 200/220 VDC DC-switching Model Number Legend MM@@K@ 1 2 3 1. Contact Form 2: DPDT 3: 3PDT 4: 4PDT (open structure type)/ DPDT+DPST-NO (cased type) 2. Type (see note) None: Standard X: DC-switching 3. Terminal Shape None: Solder B: Screw P: Plug-in Note: The suffix “JD” indicates models conforming to auxiliary power relay specifications. 2 MMK ■ Accessories (Order Separately) Sockets Relay DIN Track/Front-connecting Socket Back-connecting Socket Screw terminals Solder terminals MM2(X)KP 11PFA PL11 MM3(X)KP MM4(X)KP 14PFA PL15 MM4(X)KP-JD 14PFA --- Mounting Brackets Contact form Model DPDT R99-03 (S KANAGU) FOR MM2K.611K 3PDT R99-03 (S KANAGU) FOR MM3K.612K 4PDT R99-03 (S KANAGU) FOR MM4K.613K Specifications ■ Coil Ratings Set Coil Rated voltage (V) Rated current (mA) DP Open Relays 50 Hz AC DC 60 Hz Coil resistance (Ω) 3P, 4P Cased 50 Hz 60 Hz Open Relays Set volt. Max volt. Power consumption (VA or W) Cased 50 Hz 60 Hz 50 Hz 60 Hz DP 3P, 4P 6 790 655 690 590 1,285 1,100 1,165 1,000 1.1 0.46 12 395 325 345 295 640 550 580 500 4.7 1.9 24 195 160 170 145 320 275 290 250 19 8.2 50 94 78 82 70 154 132 140 120 82 34 100/ (110) 47 39/45 41 35/40 77 66/76 70 60/68 340 141 200/ (220) 23.5 19.5/ 22.5 20.5 17.5/ 20 38.5 33/38 35 30/34 1,540 563 6 340 450 17.5 13.4 12 176 220 68 54 24 87 94 275 255 48 41 52 1,180 930 100/ 110 17/19 22/24.5 5,750 4,500 200/ 220 8.6/9.5 11/12 23,200 18,000 % of rated voltage 80% max. 110% Initial: DP: Approx. 6.2 3P, 4P: Approx. 12 Rated: DP: Approx. 3.5 (3.9) 3P, 4P: Approx. 6 (6.6)∗ DP: Approx. 2.1 3P, 4P: Approx. 2.7 Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and ±15% for DC coil resistance. 2. Performance characteristic data are measured at a coil temperature of 23°C. 3. The AC coil resistance values are reference values. 4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of 23°C and not continuously. ∗Values in parentheses are for open relays. 3 MMK Reset Coil Rated voltage (V) Rated current (mA) 50 Hz AC DC Coil resistance (Ω) 60 Hz 6 770 690 2.3 12 385 345 9.2 24 191 170 35 50 92 82 175 100/(110) 46 41/46 739 200/(220) 23 20/23 3,030 6 422 14.2 12 215 56 Reset voltage Maximum voltage % of rated voltage 80% max. 110% Power consumption (VA or W) Initial: Approx. 6.5 Rated: Approx. 4.1 Approx. 2.8 24 109 220 48 58 832 100/110 25/27 4,040 200/220 12.2/13.5 16,330 Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and ±15% for DC coil resistance. 2. Performance characteristic data are measured at a coil temperature of 23°C. 3. The AC coil resistance values are reference values. 4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of 23°C and not continuously. Coils (Conforming to Auxiliary Power Relay Specifications) Rated voltage (V) Rated current (mA) Set coil 50 Hz AC DC 60 Hz Reset coil 50 Hz 60 Hz Coil resistance Set Reset Max. Opera(Ω) voltage voltage voltage tion level Set Reset (JECcoil coil % of rated voltage 174D) 24 245 210 191 170 8.5 35 50 117 102 92 82 36 175 100/ (110) 58.5 51/58 46 41/46 150 739 110 53 46 42 37.3 182 835 115 51 44 40 35.7 210 885 200/ (220) 29 25.5/ 29 23 20.5/ 23 620 3,030 220 26.5 23 21 18.6 780 3,420 24 94 109 255 220 48 52 58 930 832 100/ 110 22/24.5 25/27 4,500 4,040 125 22 23.5 5,800 5,330 200/ 220 11/12 12.2/13.5 18,000 16,330 80% max. 80% max. 110% A Power consumption (VA or W) Set coil Initial Rated Reset coil Initial Rated Approx. Approx. Approx. Approx. 6.3 5.1 6.5 4.1 Approx. 2.7 Approx. 2.8 Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and ±15% for DC coil resistance. 2. The AC coil resistance and coil inductance values are for reference only. 3. Performance characteristic data are measured at a coil temperature of 23°C. 4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of 23°C and not continuously. 4 MMK ■ Contact Ratings Standard Relays Item Open Relays: MM2K(B), MM3K(B), MM4K(B) Resistive load (cosφ = 1) Cased Relays: MM2KP, MM3KP, MM4KP Inductive load (cosφ=0.4, L/R=7 ms) Resistive load (cosφ = 1) Contact mechanism Single Contact material Ag Rated load 10 A at 220 VAC 7 A at 24 VDC 5 A at 220 VAC 4 A at 24 VDC Rated carry current 10 A 5A Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC Max. switching current 10 A 5A Max. switching power (reference value) 2,200 VA, 168 W 1,100 VA, 96W Inductive load (cosφ=0.4, L/R=7 ms) DC-switching Relays Item Open Relays: MM2XK(B), MM3XK(B), MM4XK(B) Resistive load (cosφ = 1) Contact mechanism Single Contact material Ag Cased Relays: MM2XKP, MM3XKP, MM4XKP Inductive load (cosφ=0.4, L/R=7 ms) 6 A at 110 VDC Resistive load (cosφ = 1) Rated load 7 A at 110 VDC Rated current flow 10 A 5 A at 110 VDC 5A Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC Max. switching current 10 A Max. switching power (reference value) 800 W, 20 VA *1 Inductive load (cosφ=0.4, L/R=7 ms) 5A 660 W, 20 VA *1 700 W, 20 VA *1 600 W, 20 VA *1 Note: 1. When switching DC inductive loads at 125 V or more, an unstable region exists for a switching current of between 0.5 and 2.5 A. The Relay will not turn OFF in this region. Use a switching current of 0.5 A or less when switching 125 VDC or more. 2. If L/R exceeds 7 ms when switching DC inductive loads, an arc-breaking time of up to 50 ms must be considered in application and the circuit must be designed to ensure that an arc-breaking time of 50 ms is not exceeded. *1.Refer to Switching an Switching an AC Load with a DC-switching Model (“X” Model) on page 13. Contacts (Conforming to Auxiliary Power Relay Specifications) Item MM4KP-JD Resistive load (cosφ = 1) Inductive load (cosφ = 0.4, L/R= 7 ms) Contact mechanism Single Contact material Ag Rated load 5 A at 220 VAC, 4 A at 24 VDC Rated carry current 5A Max. switching voltage 250 VAC, 250 VDC Max. switching current 5A MM4XKP-JD Resistive load (cosφ = 1) Inductive load (cosφ = 0.4, L/R= 7 ms) 5 A at 110 VDC Note: 1. When switching DC inductive loads at 125 V or more, an unstable region exists for a switching current of between 0.5 and 2.5 A. The Relay will not turn OFF in this region. Use a switching current of 0.5 A or less when switching 125 VDC or more. 2. If L/R exceeds 7 ms when switching DC inductive loads, an arc-breaking time of up to 50 ms must be considered in application and the circuit must be designed to ensure that an arc-breaking time of 50 ms is not exceeded. 5 MMK ■ Characteristics Item Open or bifurcated-contact Relays Contact resistance (see note 2) 50 mΩ max. Set time (see note 3) AC: 30 ms max.; DC: 60 ms max. (minimum pulse width for AC and DC: 100 ms) Reset time (see note 3) 30 ms max. (minimum pulse width for AC and DC: 100 ms) Max. operating frequency Mechanical: Electrical: Insulation resistance (see note 4) 100 MΩ min. (at 500 VDC) Dielectric strength 1,500 VAC, 50/60 Hz for 1 min between contacts of same polarity 2,000 VAC, 50/60 Hz for 1 min between contacts of different polarity, between contacts and coil, and between set and reset coils Vibration resistance Destruction: Malfunction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm double amplitude) 10 to 35 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) Shock resistance Destruction: Malfunction: 500 m/s2 50 m/s2 Endurance Mechanical: Electrical: 2,500,000 operations min. (at 1,800 operations/hr) 500,000 operations min. (at 1,800 operations/hr under rated load) (see note 5) Error rate (level P) (Reference value) (see note 6) 10 mA at 5 VDC 1,800 operations/hr 1,800 operations/hr (under rated load) Ambient temperature Operating: –10°C to 55°C (with no icing or condensation) Ambient humidity Operating: 5% to 85% Weight Standard Relays MM2K: Approx. 255 g MM3K: Approx. 390 g MM4K: Approx. 420 g MM2KP: Approx. 375 g MM3KP: Approx. 550 g MM4KP: Approx. 570 g DC-switching Relays MM2XK: Approx. 260 g MM2XK: Approx. 395 g MM4XK: Approx. 430 g MM2XKP: Approx. 380 g MM3XKP: Approx. 555 g MM4XKP: Approx. 580 g Note: 1. 2. 3. 4. The data shown above are initial values. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method. The set or reset time was measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature of 23°C. The insulation resistance was measured with a 500-VDC megger applied to the same places as those used for checking the dielectric strength. 5. The electrical endurance was measured at an ambient temperature of 23°C. 6. This value was measured at a switching frequency of 60 operations per minute. ■ Characteristics (Conforming to Auxiliary Power Relay Specifications) Vibration resistance Destruction: Malfunction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm double amplitude) 10 to 22 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) Shock resistance Destruction: Malfunction: 300 m/s2 30 m/s2 Endurance Mechanical: Electrical: 2,500,000 operations min. (at 1,800 operations/hr) 500,000 operations min. (at 1,800 operations/hr under rated load) (see note 2) Error rate (level P) (Reference value) (see note 3) 10 mA at 5 VDC Ambient temperature Operating: –10°C to 40°C (with no icing or condensation) Ambient humidity Operating: 5% to 85% Weight MM4KP-JD: Approx. 570 g MM4XKP-JD: Approx. 580 g Note: 1. The data shown above are initial values. 2. The electrical endurance was measured at an ambient temperature of 23°C. 3. This value was measured at a switching frequency of 60 operations per minute. 6 MMK Engineering Data ■ Standard Relays Maximum Switching Power Open Relays Cased Relays MM@K(B) MM@KP Switching current (A) Switching current (A) AC resistive load AC inductive load (cosφ = 0.4) DC resistive load AC resistive load AC inductive load (cosφ = 0.4) DC resistive load DC inductive load (L/R = 7 ms) DC inductive load (L/R = 7 ms) Switching voltage (V) Switching current (A) Endurance Curves Open Relays Cased Relays 10,000 5,000 3,000 220 VAC resistive load Inductive load (cosφ = 0.4) 1,000 500 300 24 VDC resistive load Inductive load L/R = 7 ms MM@KP Endurance (x10 3 operations) Endurance (x103 operations) MM@K(B) 10,000 5,000 3,000 220 VAC resistive load Inductive load (cosφ = 0.4) 1,000 500 300 Switching current (A) 24 VDC resistive load Inductive load L/R = 7 ms Switching current (A) ■ DC-switching Relays Maximum Switching Power Open Relays Cased Relays DC resistive load DC inductive load L/R=7 ms Switching voltage (V) MM@XKP Switching current (A) Switching current (A) MM@XK(B) DC resistive load DC inductive load L/R=7 ms Switching voltage (V) 7 MMK Endurance Curves Open Relays Cased Relays MM@XKP Endurance (x10 3 operations) 10,000 5,000 3,000 110 VDC resistive load 1,000 500 110 VDC inductive load (L/R 7 ms) 300 Endurance (x10 3 operations) MM@XK(B) 10,000 5,000 3,000 110 VDC resistive load Inductive load L/R=7 ms 1,000 500 300 Switching current (A) Switching current (A) ■ Relays Conforming to Auxiliary Power Relay Specifications Maximum Switching Power MMX4KP-JD AC inductive load cosφ = 0.4 DC resistive load AC resistive load Switching current (A) Switching current (A) MM4KP-JD DC resistive load DC inductive load L/R = 7 ms DC inductive load L/R = 7 ms Switching voltage (V) Switching voltage (V) Endurance Curves MM4XKP-JD 220 VAC resistive load Inductive load cosφ = 0.4 Endurance (x 10 4 ) Endurance (x 10 4 ) MM4KP-JD 110 VDC resistive load Inductive load L/R = 7 ms 24 VDC resistive load Inductive load L/R = 7 ms Switching current (A) Switching current (A) 8 MMK MM4KP AC (60 Hz) MM4KP 110 VAC (60 Hz) Number of Relays: 5 Set voltage Reset voltage Coil temperature rise (° C) Ambient Temperature vs. Coil Temperature Rise Must-operate and reset voltage (%) Ambient Temperature vs. Set and Reset Voltage Malfunctioning Shock MM4(X)KP 60 min. Reset Number of Relays: 5 60 min. 60 min. 60 min. 60 min. Contact carry current Set coil Reset coil 60 min. Unit: m/s2 Number of samples: 3 Ambient temperature (°C) MM4KP DC Number of Relays: 5 Set voltage Reset voltage Coil temperature rise ( ° C) Must-operate and reset voltage (%) MM4KP DC Ambient temperature (°C) Number of Relays: 5 Measurement conditions: Impose a shock of 50 m/s2 in the ±X, ±Y, and ±Z directions three times each with the Relay energized and not energized to check the shock values that cause the Relay to malfunction. Shock direction Contact carry current Set coil Reset coil Ambient temperature (°C) Ambient temperature (°C) 9 MMK Dimensions Note: All units are in millimeters unless otherwise indicated. ■ Open Relays with Solder Terminals MM2(X)K, MM3(X)K, MM4(X)K MM2(X)K 2P MM4(X)K MM3(X)K 1P 3P 2P 1P Side View Common C 4P 3P 2P 1P Stationary A Stationary B 86 max. Set coil 94 max. 94 max. Reset coil 22 ±0.2 44 max. MM2K 15 max. 29 ±0.2 34 ±0.2 63 max. 28 ±0.2 50 max. Two, M4 mounting holes 58.5 max. Note: Connect the common (C) of MM@XK to positive (+). ■ Open Relays with Screw Terminals MM2(X)KB, MM3(X)KB, MM4(X)KB MM2(X)KB 2P MM3(X)KB 1P 3P 2P 1P 4P 3P 2P Side View 1P Thirteen, M3.5 x 5.5 terminal screws Ten, M3.5 x 5.5 terminal screws 92 max. MM4(X)KB Common C Sixteen, M3.5 x 5.5 terminal screws Stationary A Stationary B Set coil 101 max. 101 max. Reset coil 22 ±0.2 60 max. MM2KB 28 ±0.2 60 max. 34 ±0.2 68 max. Two, M4 mounting holes 29 ±0.2 58.5 max. 15 max. Note: Connect the common (C) of MM@XKB to positive (+). Mounting Holes (Direct Mounting) Note: The tolerance is ±0.2. Two, 4.5-dia. mounting holes 29±0.2 Dimensions of : l 2-pole: 22±0.2 mm 3-pole: 28±0.2 mm 4-pole: 34±0.2 mm l Mounting Bracket (S Bracket) Item R99-03 (S KANAGU) FOR MM@ H W The S Bracket can be used to mount a Relay with open solder or screw terminals. D 29±0.2 60±0.2 50 R99-03 R99-03 R99-03 (S KANAGU) (S KANAGU) (S KANAGU) FOR MM2K.611K FOR MM3K.612K FOR MM4K.613K (DPDT) (3PDT) (4PDT) l 22±0.2 28±0.2 D 71 max. 71 max. 71 max. W 33 max. 39 max. 45 max. H 6 max. 6 max. 6 max. 34±0.2 l 10 MMK ■ Cased Relays with Plug-in Terminal MM2(X)KP Terminal Arrangement/ Internal Connections (Bottom View) 54.5 max. (see note) 22 3.5 119 max. 7 Standard Relays MM2KP 5 RESET 80.5 max. 64.5 max. MM2KP DC-switching Relays MM2XKP Note: It is recommended that 55 mm min. is allowed for this side because the MM2XKP has a curved protective plate on the side. MM3(X)KP MM4(X)KP RESET SET SET Note: Connect the common (C) to positive (+). Make sure that all common connections are the same in polarity. The markings of the common connections on the casing all show "+" but the polarity of the common connections can be either all negative or all positive. 72.5 max. (see note) 123 max. 80.5 max. Note: It is recommended that 73 mm min. is allowed for this side because the MM3XKP and MM4XKP have a curved protective plate on the side. 64.5 max. MM4KP Terminal Arrangement/ Internal Connections (Bottom View) Standard Relays MM3KP DC-switching Relays MM3XKP MM4KP MM4XKP Note: Connect the common (C) to positive (+). Make sure that all common connections are the same in polarity. The markings of the common connections on the casing all show "+" but the polarity of the common connections can be either all negative or all positive. Cases on Models for Switching DC Loads As shown at the right, there are three holes with a 10-mm diameter in the case. Case Protective Plate Be sure the polarity is correct when connecting Exposed Models. This example is for the MN2XK. This also applies to models with 3 or 4 poles. 11 MMK Terminal Arrangement/ Internal Connections (Bottom View) MM4KP-JD 72.5 max. 123 max. 70.5 max. 64.5 max. Note: The MM4KP-JD is DPDT and DPST-NO. MM4XKP-JD 73 max. 123 max. 70.5 max. 64.5 max. Note: The MM4XKP-JD is DPDT and DPSTNO. Make sure that all common connections are the same in polarity. The markings of the common connections on the casing all show "+" but the polarity of the common connections can be either all negative or all positive. Accessories ■ Sockets Relay model DIN Track/Front-connecting Socket Back-connecting Socket Screw terminals Solder terminals MM2(X)KP 11PFA PL11 MM3(X)KP MM4(X)KP 14PFA PL15 MM4(X)KP-JD 14PFA --- Note: When using the MM@KP-JD by itself, the PL15 Back-connecting Socket cannot be used. ■ Height with Socket DIN Track/Front-connecting Socket MM2KP MM2XKP 151 147.5 155 MM3KP MM3XKP MM4KP MM4XKP MM4(X)KP-JD Back-connecting Socket 124 MM2KP MM2XKP 151.5 PL11 11PFA 128 MM3KP MM3XKP MM4KP MM4XKP PL15 14PFA Note: @PFA can be both track-mounted and screw-mounted. 12 MMK Safety Precautions Refer to Safety Precautions for All Relays. ■ Mounting Make sure that the Relay is free from iron powder or iron core, otherwise the iron dust may adhere to the Relay. As a result the movable contact may not operate properly. An arc may be generated between the contacts in switching operation. Be sure to keep combustible objects away from the Relay. If the arc will have a bad effect around the Relay, the use of a model with a casing is recommended. A model switching DC load incorporates an insulation base with a small built-in permanent magnet. Be sure to keep magnets or ferrous objects away from the permanent magnet, otherwise the capacity of the maximum switching current may drop. The PL Back-connecting Socket must be flush-mounted from the surface of the panel. To minimize the influence of heat, separate Relays from each other by at least 20 mm for cooling when mounting multiple Relays together. 20 mm min. Top MMK MMK Normal mounting direction Bottom Be sure to mount the Relay so that the movable contact is in the downward direction. • NC contacts can remain open for a few milliseconds when the reset coil turns ON and OFF. NO contact can remain open for a few milliseconds when the set coil turns ON and OFF while the Relay is latched. Design your circuits to allow for this. MMK contact (NC) The contact may fail to hold itself. Relay coil • Do not allow voltage to be applied simultaneously to both the set and reset coil. If voltage is applied simultaneously, the Relay will be set. • There is no reason to apply voltage to Latching Relays continuously because they will latch properly with a single pulse of sufficient width. Continuously applying voltage will only waste power. • A model for DC loads incorporates a permanent magnetic for arc suppression. Keep floppy disks away from the Relay, otherwise the data on the floppy disk may be damaged. • Arcing when switching DC power can cause nitric gas to be generated. The case of the MM@XKP contains holes to allow the gas to escape. This, however, makes it possible for dust and dirt to enter the case. Be sure to use the MM@XKP in a suitable environment. ■ Connection • When connecting a load to the contact terminals of a model for switching DC loads (“X” models), consider the polarity of the contact terminals so that the generated arcs on the adjacent poles will not collide. (For example, if the common connections of the Relay are all positive or all negative, no arc collision will occur.) • Use proper crimp terminals or 1.2- to 2-mm-dia. single-conductor wire to connect screw terminals. Screw Terminal Model Do not bend the coil terminals, otherwise the coil wire may be disconnected. Make sure that the tightening torque applied to each terminal is 1.27 N • m and the insertion force is 49 N for 10 s. Solder Terminal Model Make sure that Relay terminals are free of flux or other foreign substance before soldering the Relay terminals. Finish soldering the Relay terminals quickly, otherwise the coil wire may be broken. ■ Circuits • You cannot use single contact to demagnetize the set coil as shown below. Load ■ Switching an AC Load with a DC-switching Model (“X” Model) DC-switching Relays (“X” models) use a magnet to extinguish arcs. The polarity must be correct when you connect the switching section. However, if you connect an AC load, the positive and negative poles of the power supply alternate. This can cause short-circuits due to the collision of arcs that occur when the Relay turns OFF. Therefore, the switching capacity for an AC load is specified as 20 VA or less to prevent short circuits caused by arc collisions. Take sufficient caution if you switch an AC Load with a DC-switching model (“X” models). ■ Refer to the technical guide on your OMRON website for technical descriptions and FAQs on the product. Latching Relay coil NC contact of the Relay ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. In the interest of product improvement, specifications are subject to change without notice. 13 Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. 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Omron Companies shall not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice, recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above warranty. See http://www.omron.com/global/ or contact your Omron representative for published information. Limitation on Liability; Etc. OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted. Suitability of Use. Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases. NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. Programmable Products. Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence thereof. Performance Data. Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability. Change in Specifications. Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to confirm actual specifications of purchased Product. Errors and Omissions. Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions. 2014.10 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2014 All Right Reserved.