Safety Locking Door Switches
Brand :
MISUMI
Caution
Product Overview
The E-MSM2 series safety door locks are the most commonly used door interlock technology. They use a key installed at the switch opening to detect the movement of the safety door. With their compact and lightweight design, diverse contact configurations, and locking function, safety door locks are usually the most cost-effective solution. In addition, the use of flexible keys increases their misalignment tolerance, making them suitable for a wide range of applications. The E-MSM2 series safety door locks allow the switch head to be rotated four times at 90° angles, the key can be inserted into the switch in seven different positions, and the solenoid can be set to operate with power on or power off. This provides a variety of options for the switch’s operating modes and installation methods on protective doors. This increases the flexibility of the switch, making it suitable for use on various types of doors.
◆ Built-in multiple contact structure options;
◆ Locking force of 1300N;
◆ IP67 protection rating;
◆ Housing made of PA66 flame-retardant material;
◆ Suitable for general or micro loads.
◆ Built-in multiple contact structure options;
◆ Locking force of 1300N;
◆ IP67 protection rating;
◆ Housing made of PA66 flame-retardant material;
◆ Suitable for general or micro loads.
■ Locking method description
| Mechanical locking / electromagnetic release | After the operating key is inserted, the contacts of the safety control circuit close (normally closed contacts), and the operating key is automatically locked by the mechanical locking mechanism and cannot be removed. After the internal electromagnet is powered, the mechanical locking mechanism is released, allowing the operation key to be removed normally. Once the operation key is removed, the contacts of the safety control circuit open. |
| Electromagnetic Locking / Mechanical Release | After the operation key is inserted, it can still be removed normally at this time. Only when the internal electromagnet is powered will the operation key be locked and cannot be removed, and the contacts of the safety control circuit will close (normally closed contacts). When the internal electromagnet is powered off, the electromagnetic locking mechanism is released, and the operating key can be removed. |
| Even when the internal electromagnet is powered on, the lock can be released by turning the mechanical lock knob from the LOCK position to the UNLOCK position using a release tool. At this point, the operating key can also be removed normally. After the operating key is removed, the contacts of the safety control circuit are disconnected. |
Dimensional Drawing
★ Rear unlock key not provided
Specification Overview
■ Technical Parameters
| Compliance standards | IEC61508 SIL2 TUV EN 60947-5-1:2017 | |
| Material | PA66 flame retardant | |
| Mechanical life | Over 1,000,000 cycles | |
| Electrical life | Over 150,000 cycles (240 V AC 3 A, resistive load) | |
| Type of use | AC-15 | DC-13 |
| Rated operational voltage (Ue) | 240V | 24V |
| Rated operational current (Ie) | 3A | 2A |
| Electromagnetic coil | ||
| Rated operational voltage | DC24V | |
| Power | 4.8W | |
| Rated current | Approx. 200 mA | |
| Insulation | Class B (130°C) | |
| LED indicator | ||
| Rated operational voltage | DC24V | |
| Rated current | Approx. 2 mA | |
| Emitting color (LED) | Green | |
| Environment | ||
| Operating ambient temperature | -10°C to +55°C, no freezing | |
| Operating ambient humidity | 95% RH or less | |
| Electrical | ||
| Contact resistance | 200 mΩ or less | |
| Rated open thermal current (Ith) | 10A | |
| Rated insulation voltage (Ui) | 300V | |
| Electric shock protection class | Class II (double insulation) | |
| Impulse withstand voltage (EN60947-5-1) | 2.5 kV | |
| Insulation resistance | 100 MΩ or more | |
| Short-circuit protection device | Requires a quick-blow fuse, 10 A, 250 V | |
| Vibration resistance | 10-55Hz, double amplitude 1.5 mm | |
| Shock resistance | Durability 1000 m/s2 | |
| Conditional short-circuit current | 100A | |
| Contact gap | 2 x 2 mm or more | |
| Operating characteristics | ||
| Pre-travel for positive opening | 10 mm or more | |
| Operating speed | 0.1 m to 0.5 m/s | |
| Permissible operating frequency | Maximum 30 operations per minute | |
| Pull-out strength when locked | 1300N | |
Specification Table
| Including operating key model | Safety door lock model | Operating key model | Contact Type | Locking Method | Material | Door lock holding force | Rated Operating Voltage/Current | Safety Level |
| E-MSM2AFG-K1 | E-MSM2AFG | 1NC/1NO+1NC/1NO | 24 V DC Electromagnetic Locking/Mechanical Release | Safety Door Lock Material: PA66 Operating Key | 1300N | 24 V DC, 200 mA | IEC61508 SIL2 TUV 60947-5-1:2017 | |
| E-MSM2AFA-K1 | E-MSM2AFA | T Shape  E-MSMD2-K1 | Mechanical Locking/24 V DC Electromagnetic Release | |||||
| E-MSM2CFG-K1 | E-MSM2CFG | 2NC+1NC/1NO | 24 V DC Electromagnetic Locking/Mechanical Release | |||||
| E-MSM2DFG-K1 | E-MSM2DFG | 2NC+2NC | ||||||
| E-MSM2DFA-K1 | E-MSM2DFA | Mechanical Locking/24 V DC Electromagnetic Release | ||||||
| E-MSM2TFG-K1 | E-MSM2TFG | 3NC+1NC | 24 V DC Electromagnetic Locking/Mechanical Release | |||||
| E-MSM2OFG-K1 | E-MSM2OFG | 1NC+3NC | ||||||
| E-MSM2AFG-K2 | E-MSM2AFG | 1NC/1NO+1NC/1NO | 24 V DC Electromagnetic Locking/Mechanical Release | |||||
| E-MSM2AFA-K2 | E-MSM2AFA | L Shape  E-MSMD2-K2 | Mechanical Locking/24 V DC Electromagnetic Release | |||||
| E-MSM2CFG-K2 | E-MSM2CFG | 2NC+1NC/1NO | 24 V DC Electromagnetic Locking/Mechanical Release | |||||
| E-MSM2DFG-K2 | E-MSM2DFG | 2NC+2NC | ||||||
| E-MSM2DFA-K2 | E-MSM2DFA | Mechanical Locking/24 V DC Electromagnetic Release | ||||||
| E-MSM2TFG-K2 | E-MSM2TFG | 3NC+1NC | 24 V DC Electromagnetic Locking/Mechanical Release | |||||
| E-MSM2OFG-K2 | E-MSM2OFG | 1NC+3NC | Mechanical Locking/24 V DC Electromagnetic Release |
Product Features
■ Wiring diagram
Inside the top of the door
Door lock structure
· Do not wire the switch while it is powered on. Otherwise, electric shock may occur.
· When wiring, do not allow small wires or other fine particles to enter the switch body.
· When connecting terminals using an insulating tube or M3.0 crimp terminals, make sure they are not pressed against the housing or cover.
· Applicable wire size: AWG20 to AWG18 (0.5 to 0.75 mm). Use wires of appropriate length for wiring. Otherwise, the cover may bulge or may not be properly secured.
· Do not insert crimp terminals into the gaps of the housing, as this may cause damage or deformation of the housing.
· To prevent the terminal from contacting the inside of the switch housing, use terminals with a thickness of less than 0.5 mm.
Contact Structure and Operation
| Model | Contact Type | Contact Form | Operation Mode | ||
| Door Monitoring | Lock Monitoring | ■ Contact ON | □ Contact OFF | ||
  |  | ||||
| E-MSM2AFG | 1NC/1NO+1NC/1NO |  |  | ||
| E-MSM2AFA | |||||
| E-MSM2CFG | 2NC+1NC/1NO |  |  | ||
| E-MSM2DFA | 2NC+2NC |  |  | ||
| E-MSM2DFG | |||||
| E-MSM2TFG | 3NC+1NC |  |  | ||
| E-MSM2OFG | 1NC+3NC |  |  | ||
■Operating characteristics
·Electromagnetic locking, mechanical release
·Electromagnetic locking, mechanical release
| Contact configuration For example: 2NC+1NC/NO | Factory state (key not inserted) | Door closed state (key inserted) | Door closed state (key inserted and locked) | Door open state (key removed) | Manual unlocking - perform unlocking |
| Contact change status |  |  |  |  |  |
| Electromagnetic coil status | Power off | Power off | Power on | Power off | Power off |
| Manual unlock knob status | | | | | |
| Safety door status | Open | Closed | Closed | Open | Closed |
| Note | Door is open Equipment cannot operate Electromagnet is de-energized | Door is closed Equipment cannot operate Electromagnet is de-energized | Door is closed Equipment is operating Electromagnet is energized | Door is open Equipment cannot operate Electromagnet is de-energized | Door is closed Equipment cannot operate Do not perform manual unlocking while powered on. Do not keep the coil energized for a long time when the door is open or in the unlocked position. |
Electromagnetic/mechanical door lock with operation key kit model.
·Mechanical locking, electromagnetic release
| Contact configuration For example: 2NC+1NC/NO | Factory state (key not inserted) | Door closed state (key inserted and locked) | Door unlocked state (key inserted) | Door open state (key removed) | Manual unlocking - perform unlocking |
| Contact change status | | | | | |
| Electromagnetic coil status | Power off | Power off | Power on | Power off | Power off |
| Manual unlock knob status | | | | | |
| Safety door status | Open | Closed | Closed | Open | Closed |
| Note | Door is open Equipment cannot operate Electromagnet is de-energized | Door is closed Equipment is operating Electromagnet is de-energized | Door is closed and unlocked Equipment cannot operate Electromagnet is energized | Door is open Equipment cannot operate Electromagnet is de-energized | Door is closed Equipment cannot operate Electromagnet is de-energized |
Note: When the operation key is inserted, it is locked by the force of the spring. Therefore, it remains locked during a power outage and unlocks when the solenoid coil is energized. In an emergency, manual unlocking is also possible (turn to the UNLOCK position with a Phillips screwdriver).
Usage Method
■ Combined use with safety door latch
(Latch model: E-MSMSKF10-LK)
Installation on right-side movable door
1. Use six M6*16 mm screws to secure the latch base
2. Use two M5*16 mm screws to secure the key adapter
3. Use four M4*34 mm countersunk screws to secure the safety door lock
4. Use two M6*16 mm screws to secure the door lock base
5. Use two M4*8 mm fixing screws to secure the door lock key
2. Use two M5*16 mm screws to secure the key adapter
3. Use four M4*34 mm countersunk screws to secure the safety door lock
4. Use two M6*16 mm screws to secure the door lock base
5. Use two M4*8 mm fixing screws to secure the door lock key
Installation on left-side movable door
1. Use 6 M6*16 mm screws to secure the latch base
2. Use 2 M5*16 mm screws to secure the key adapter
3. Use 4 M4*34 mm countersunk screws to secure the safety door lock
4. Use 2 M6*16 mm screws to secure the door lock base
5. Use 2 M4*8 mm fixing screws to secure the door lock key
1. Use 6 M6*16 mm screws to secure the latch base
2. Use 2 M5*16 mm screws to secure the key adapter
3. Use 4 M4*34 mm countersunk screws to secure the safety door lock
4. Use 2 M6*16 mm screws to secure the door lock base
5. Use 2 M4*8 mm fixing screws to secure the door lock key
■ Installation method for the stopper base
During installation, please be careful not to drop the product from a height. Otherwise, it may cause personal injury.
Do not use the main unit as a stopper. Be sure to install the stopper as shown in the diagram to prevent the flange of the operating key from hitting the head.
During installation, please be careful not to drop the product from a height. Otherwise, it may cause personal injury.
Do not use the main unit as a stopper. Be sure to install the stopper as shown in the diagram to prevent the flange of the operating key from hitting the head.
