MM2K

MMK OMRON | Alldatasheet

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Technical content

Mechanically Latching Relays Based on the MM Power Relay

• Low power consumption due to mechanical latch for economic op- eration.  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 ap- plications.  Ambient operating temperature: –10°C to 55°C.

Ordering Information

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. ■Available Models Open Coils (with Solder Terminals) Type Contact form Open structure Cased Solder terminals Screw terminals Plug-in (octal pins) terminals Standard DPDT MM2K MM2KB MM2KP 3PDT MM3K MM3KB MM3KP 4PDT MM4K MM4KB --- DPDT+DPST -NO --- --- MM4KP DC-switching DPDT MM2XK MM2XKB MM2XKP 3PDT MM3XK MM3XKB MM3XKP 4PDT MM4XK MM4XKB --- DPDT+DPST -NO --- --- MM4XKP Conforming to auxiliary power relay specifications DPDT+DPST -NO --- --- MM4KP-JD MM4XKP-JD Refer to Safety Precautions for All Relays. Rated coil voltage 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 8IFOZPVSPSEFS TQFDJGZUIFSBUFEWPMUBHF Type Contact form Relay model Available rated voltage Standard 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 DC-switching DPDT MM2XK 24, 100/110 VDC 3PDT MM3XK 200/(220) VAC 100/110 VDC 4PDT MM4XK 100/(110) VAC 100/110 VDC

Open Coils (with Screw Terminals) Cased Coils (Plug-in Terminals) Model Number Legend 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. Type Contact form Relay model Available rated voltage Standard 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 DC-switching 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 Type Contact form Relay model Available rated voltage Standard 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 DC-switching 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 MM@@K@ 1 2 3

■Accessories (Order Separately) Sockets Mounting Brackets Specifications ■Coil Ratings Set Coil 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. Relay DIN Track/Front-connecting Socket Back-connecting Socket Screw terminals Solder terminals MM2(X)KP MM3(X)KP MM4(X)KP 14PFA PL15 MM4(X)KP-JD 14PFA --- 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 Rated voltage (V) Rated current (mA) Coil resistance (Ω) Set volt. Max volt. Power consumption (VA or W)DP 3P, 4P Open Relays Cased Open Relays Cased

50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz DP 3P, 4P % of rated

AC 6 790 655 690 590 1,285 1,100 1,165 1,000 1.1 0.46 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)∗ 12 395 325 345 295 640 550 580 500 4.7 1.9 24 195 160 170 145 320 275 290 250 19 8.2 100/ (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/ 38.5 33/38 35 30/34 1,540 563 DC 6 340 450 17.5 13.4 DP: Approx. 2.1 3P , 4P: Approx. 2.712 176 220 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 11PFA PL11

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) 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. Rated voltage (V) Rated current (mA) Coil resistance (Ω) Reset voltage Maximum voltage Power consumption (VA or W)50 Hz 60 Hz % of rated voltage AC 6 770 690 2.3 80% max. 110% Initial: Approx. 6.5 Rated: Approx. 4.112 385 345 9.2 24 191 170 35 100/(110) 46 41/46 739 200/(220) 23 20/23 3,030 DC 6 422 14.2 Approx. 2.8 12 215 56 24 109 220 48 58 832 100/110 25/27 4,040 200/220 12.2/13.5 16,330 Rated voltage (V) Rated current (mA) Coil resistance (Ω) Set voltage Reset voltage Max. voltage Opera- tion level (JEC- 174D) Power consumption (VA or W) Set coil Reset coil Set coil Reset coil Set coil Reset coil

50 Hz 60 Hz 50 Hz 60 Hz % of rated voltage Initial Rated Initial Rated

AC 24 245 210 191 170 8.5 35 80% max. 80% max. 110% A Approx. 6.3 Approx. 5.1 Approx. 6.5 Approx. 4.1100/ (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/ 23 20.5/ 620 3,030 220 26.5 23 21 18.6 780 3,420 DC 24 94 109 255 220 Approx. 2.7 Approx. 2.8 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

■Contact Ratings Standard Relays DC-switching Relays 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. 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) 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. 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. Item Open Relays: MM2K(B), MM3K(B), MM4K(B) Cased Relays: MM2KP, MM3KP, MM4KP Resistive load (cosφ = 1) Inductive load (cosφ=0.4, L/R=7 ms) Resistive load (cosφ = 1) Inductive load (cosφ=0.4, L/R=7 ms) 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 5 A Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC Max. switching current 10 A 5 A Max. switching power (reference value) 2,200 VA, 168 W 1,100 VA, 96W Item Open Relays: MM2XK(B), MM3XK(B), MM4XK(B) Cased Relays: MM2XKP, MM3XKP, MM4XKP Resistive load (cosφ = 1) Inductive load (cosφ=0.4, L/R=7 ms) Resistive load (cosφ = 1) Inductive load (cosφ=0.4, L/R=7 ms) Contact mechanism Single Contact material Ag Rated load 7 A at 110 VDC 6 A at 110 VDC 5 A at 110 VDC Rated current flow 10 A 5 A Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC Max. switching current 10 A 5 A Max. switching power (reference value)

800 W, 20 VA *1 660 W, 20 VA *1 700 W, 20 VA *1 600 W, 20 VA *1

(cosφ = 1) Inductive load (cosφ = 0.4, L/R= 7 ms) 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 5 A at 110 VDC Rated carry current 5 A Max. switching voltage 250 VAC, 250 VDC Max. switching current 5 A

■Characteristics Note: 1. The data shown above are initial values. 2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method. 3. The set or reset time was measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature of 23°C. 4. 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) 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. 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: 1,800 operations/hr Electrical: 1,800 operations/hr (under rated load) 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: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm double amplitude) Malfunction: 10 to 35 to 10 Hz, 0.5 mm singl e amplitude (1.0 mm double amplitude) Shock resistance Destruction: 500 m/s 2 Malfunction: 50 m/s 2 Endurance Mechanical: 2,500,000 operations min. (at 1,800 operations/hr) Electrical: 500,000 operations min. (at 1,8 00 operations/hr under rated load) (see note 5) Error rate (level P) (Reference value) (see note 6) 10 mA at 5 VDC Ambient temperature Operating: –10°C to 55°C (with no icing or condensation) Ambient humidity Operating: 5% to 85% Weight Standard Relays DC-switching Relays MM2K: Approx. 255 g MM2XK: Approx. 260 g MM3K: Approx. 390 g MM2XK: Approx. 395 g MM4K: Approx. 420 g MM4XK: Approx. 430 g MM2KP: Approx. 375 g MM2XKP: Approx. 380 g MM3KP: Approx. 550 g MM3XKP: Approx. 555 g MM4KP: Approx. 570 g MM4XKP: Approx. 580 g Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm double amplitude) Malfunction: 10 to 22 to 10 Hz, 0.5 mm singl e amplitude (1.0 mm double amplitude) Shock resistance Destruction: 300 m/s Malfunction: 30 m/s 2 Endurance Mechanical: 2,500,000 operations min. (at 1,800 operations/hr) Electrical: 500,000 operations min. (at 1,8 00 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

■Standard Relays ■DC-switching Relays 0.5 0.3 0.1 5 10 30 50 100 300 500 1,0005 10 30 50 100 300 500 1,000 0.5 0.3 0.1 Maximum Switching Power Open Relays Switching voltage (V) Cased Relays Switching current (A) AC resistive load DC resistive load DC inductive load (L/R = 7 ms) AC inductive load (cosφ = 0.4) MM@K(B) Switching current (A) Switching current (A) AC resistive load AC inductive load (cosφ = 0.4) DC resistive load DC inductive load (L/R = 7 ms) MM@KP 0 1234567 8 91 0 1,000 500 300 100 0 1234567 8 91 0 1,000 500 300 100 Endurance Curves Open Relays Cased Relays Switching current (A)

220 VAC resistive load

(cosφ = 0.4)

24 VDC resistive load

L/R = 7 ms Endurance (x10 operations) MM@K(B) Switching current (A) (cosφ = 0.4) L/R = 7 ms Endurance (x10 operations) MM@KP 5 10 30 50 100 300 500 1,000 0.5 0.3 0.1 5 10 30 50 100 300 500 1,000 0.5 0.3 0.1 Maximum Switching Power Open Relays Switching voltage (V) Cased Relays DC inductive load L/R=7 ms DC resistive load MM@XK(B) Switching current (A) Switching voltage (V) DC inductive load L/R=7 ms DC resistive load MM@XKP Switching current (A)

■Relays Conforming to Auxiliary Power Relay Specifications 0 1234567 8 91 0 1,000 500 300 100 01 2 3 4 5 6 7 8 91 0 1,000 500 300 100 Endurance Curves Open Relays Cased Relays Switching current (A)

110 VDC resistive load

110 VDC inductive load

(L/R 7 ms) Endurance (x10 operations) MM@XK(B) Switching current (A)

110 VDC

L/R=7 ms Endurance (x10 operations) MM@XKP 5 10 30 50 100 300 500 1,000 0.5 0.3 0.1 5 10 30 50 100 300 500 1,000 0.5 0.3 0.1 0 1234567 8 91 0 1,000 500 300 100 0 1234567 8 91 0 1,000 500 300 100 Maximum Switching Power MM4KP-JD MMX4KP-JD Endurance Curves MM4KP-JD MM4XKP-JD AC resistive load AC inductive load cosφ = 0.4 DC resistive load DC inductive load L/R = 7 ms Switching voltage (V) DC resistive load DC inductive load L/R = 7 ms Switching voltage (V) End urance (x 10 ) cosφ = 0.4 L/R = 7 ms Switching current (A) End urance (x 10 ) L/R = 7 ms Switching current (A) Switching current (A) Switching current (A)

-40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 5.0A 5.0A 2.5A 2.5A Y X 60 min. 60 min. Reset 60 min. 60 min. -40 -20 0 20 40 60 80 5.0A 5.0A 2.5A 2.5A Ambient Temperature vs. Set and Reset Voltage MM4KP AC (60 Hz) Ambient Temperature vs. Coil Temperature Rise MM4KP 110 VAC (60 Hz) Malfunctioning Shock MM4(X)KP MM4KP DC MM4KP DC M ust-operate and reset voltage ( Number of Relays: 5 Set voltage Reset voltage Ambient temperature (°C) Coil temperature rise (°C) Number of Relays: 5 Contact carry current Set coil Reset coil Ambient temperature (°C) Unit: m/s2 Number of samples: 3 Measurement conditions: Impose a shock o 50 m/s2 in the ±X, ±Y , and ±Z directions thr times each with the Relay energized and no energized to check the shock values that ca the Relay to malfunction. M ust-operate and reset voltage ( Number of Relays: 5 Set voltage Reset voltage Ambient temperature (°C) Coil temperature rise (°C) Number of Relays: 5 Contact carry current Set coil Reset coil Ambient temperature (°C) Shock direction

Note: All units are in millimeters unless otherwise indicated. ■Open Relays with Solder Terminals ■Open Relays with Screw Terminals 86 max. 44 max. ±0.2 50 max. 94 max. ±0.234 ±0.2 MM2(X)K, MM3(X)K, MM4(X)K MM2(X)K MM3(X)K 94 max. 63 max. MM4(X)K MM2K 15 max. Two, M4 mounting holes 58.5 max. Side View 2P 1P 3P 1P2P 4P 2P3P 1P Common C Stationary A Stationary B Set coil Reset coil Note: Connect the common (C) of MM@XK to positive (+). ±0.2 ±0.2 MM2(X)KB, MM3(X)KB, MM4(X)KB MM2KB 92 max. Ten, M3.5 x 5.5 terminal screws 60 max. MM2(X)KB Thirteen, M3.5 x 5.5 terminal screws 101 max. ±0.2 MM3(X)KB Sixteen, M3.5 x 5.5 terminal screws 68 max. ±0.2 101 max. MM4(X)KB 15 max. Two, M4 mounting holes 58.5 max. ±0.2 Side View 60 max. 2P 1P 2P 1P3P 2P 1P3P4P Common C Station-ary A Station-ary B Set coil Reset coil 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) R99-03 (S KANAGU) FOR MM@ The S Bracket can be used to mount a Relay with open solder or screw terminals. W H % 60±0.2 5029±0.2 Item R99-03 (S KANAGU) FOR MM2K.611K (DPDT) R99-03 (S KANAGU) FOR MM3K.612K (3PDT) R99-03 (S KANAGU) FOR MM4K.613K (4PDT) l 22±0.2 28 ±0.2 34 ±0.2 D 71 max. 71 max. 71 max. W 33 max. 39 max. 45 max. H 6 max. 6 max. 6 max.

■Cased Relays with Plug-in Terminal Cases on Models for Switching DC Loads As shown at the right, there are three holes with a 10-mm diameter in the case. Terminal Arrangement/ Internal Connections (Bottom View) Note: Connect the common (C) to positive (+). Make s ure that all common connections are the same in polarity. The markings of the common connections on the casing all sho w "+" but the polarity of the common connections can be ei- ther all negati ve or all positive. Standard Relays MM2KP DC-switching Relays MM2XKP MM2(X)KP MM2KP 80.5 max. 54.5 max. (see note) 119 max. 64.5 max. 3.5 7 Note: It is recommended that 55 mm min. is allowed for this side because the MM2XKP has a c urved protective plate on the side. Terminal Arrangement/ Internal Connections (Bottom View) Note: Connect the common (C) to positive (+). Make s ure that all common connections are the same in polarity. The markings of the common connections on the casing all sho w "+" but the polarity of the common connections can be either all negative or all positive. Standard Relays MM3KP DC-switching Relays MM3XKP MM3(X)KP MM4(X)KP 80.5 max. 72.5 max. (see note) 123 max. 3.5 64.5 max. MM4KP MM4KP MM4XKP Note: It is recommended that 73 mm min. is allo wed for this side because the MM3XKP and MM4XKP ha ve a c urved protective plate on the side. 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.

■Sockets Note: When using the MM@KP-JD by itself, the PL15 Back-connecting Socket cannot be used. ■Height with Socket Relay model DIN Track/Front-connecting Socket Back-connecting Socket Screw terminals Solder terminals MM2(X)KP MM3(X)KP MM4(X)KP 14PFA PL15 MM4(X)KP-JD 14PFA --- MM4KP-JD Terminal Arrangement/ Internal Connections (Bottom View) Note: The MM4KP-JD is DPDT and DPST - NO. MM4XKP-JD Note: The MM4XKP-JD is DPDT and DPST - NO. Make sure that all common connec- tions are the same in polarity. The mark- ings of the common connections on the casing all sho w "+" but the polarity of the common connections can be either all negati ve or all positive. 70.5 max. 72.5 max. 123 max. 64.5 max. 3.5 7 3.5 7 70.5 max. 73 max. 123 max. 64.5 max. 11PFA PL11 DIN Track/Front-connecting Socket Back-connectin g Socket Note: @PFA can be both track-mounted and screw-mounted. MM3KP MM3XKP MM4KP MM4XKP MM4(X)KP-JD 151.5 MM2KP MM2XKP 151 11PFA 14PFA 155147.5 PL11 PL15 124 128 MM2KP MM2XKP MM3KP MM3XKP MM4KP MM4XKP

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. Be sure to mount the Relay so that the movable contact is in the downward direction. ■Connection

• When connecting a load to the cont act terminals of a model for switching DC loads (“X” models), consider the polarity of the con- tact 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 dis- connected. Make sure that the tightening torque applied to each ter- minal 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 sub- stance before soldering the Relay terminals. Finish soldering the Relay terminals quickly, otherwise the coil wire may be broken. ■Circuits  Y ou cannot use single contact to demagnetize the set coil as shown below.  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 milli- seconds when the set coil turns ON and OFF while the Relay is latched. Design your circuits to allow for this.  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 continu- ously because they will latch properl y with a single pulse of suffi- cient 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. ■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. Th is can cause shor t-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. 20 mm min. MMK MMK Normal mounting direction Top Bottom Latching Relay coil NC contact of the Relay Load MMK contact (NC) The contact may fail to hold itself. Relay coil In the interest of product improvement, specifications are subject to change without notice. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

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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 environmen ts. 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 no t 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. 2018.3 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 2018 All Right Reserved.