Omron MC-S Series Safety Interlock Switches
Compact Coded Magnetic Safety Interlock Switch and Control Unit
The MC-S Series offers compact, coded magnetic safety interlock switches and control units designed for robust machine safety applications. These switches provide a dual-channel, fully monitored system that meets stringent safety standards.
Key Features:
- Dual channel, fully monitored system; meets Category 3 (MC-S Series switch and control unit) or Category 4 (MC-S6).
- External Device Monitoring (EDM) with automatic or manual reset.
- NEMA 6 rated enclosures (plastic or stainless steel) suitable for harsh environments.
- Magnetically coded switches are tamper-resistant.
- Misalignment tolerance of 5 mm or 9 mm reduces nuisance tripping.
- A large number of switches can be used with a single MC-S Series control unit.
- MC-S6 control unit provides individual monitoring and indication for up to 6 switches and a N/O delayed output.
- Mechanical interlock switches can be used with MC-S Series controls.
- MC-S Series controls can replace safety relays in some applications.
- Auxiliary contacts available for individual guard door monitoring on MC-S switches.
Actual Size:
Diagrams illustrating the dimensions of Type 1 and Type 2 Sensors.
Description:
The MC-S Series is a tamper-resistant, non-contact switch that operates with its dedicated control unit. The dual-channel system, when combined with a single MC-S Series switch and control unit (1 or 2), fulfills Category 3 safety requirements. Control Unit 6, with 2 to 6 MC-S switches, meets Category 4 requirements for its 3 N/O outputs and Category 3 for the N/O delayed output. The control units support EDM, allowing them to replace safety relays in certain applications. The NEMA 6 encapsulated design ensures durability in demanding environments. The system allows for multiple MC-S switches to be connected to a single control unit, offering flexibility for applications with numerous guard doors. The control unit provides individual monitoring and LED indication for up to six MC-S switches. Mechanical switches can also be integrated with MC-S switches and a control unit for mixed-application requirements.
Operation
Operating Principle:
When the actuator is presented to the switch, the coded, high-intensity magnetic field causes the contacts to close. When the actuator is removed (door opened), the safety contacts open, isolating the machine.
Diagram showing the magnetic field interaction between the actuator and the sensor.
Mounting Examples:
Illustrations demonstrating various mounting configurations for the switches and actuators.
Contact Arrangements:
Details on wiring and contact configurations for different MC-S series components.
Diagrams showing wiring for 8-pin and 4-pin connectors for both male and female configurations, including color coding for wires.
Note on actuator-must-not-strike-sensor and recommended gap between sensor and actuator.
Information on misalignment tolerance for Type 1, Type 2, and Type 3 sensors.
Mention of Universal Mounting Brackets available as accessories.
Applications
Typical applications include sliding guard doors and swinging guard doors.
Diagrams illustrating typical applications on guard doors.
Wiring Diagrams:
Detailed wiring diagrams are provided for various configurations:
- Single sensor and two contactors with manual reset and EDM.
- Three sensors and two contactors with manual reset and EDM.
These diagrams illustrate the connection of MC-S sensors and control units to contactors, reset buttons, and start buttons, along with auxiliary contacts for indication. Notes are included regarding the use of multiple sensors and potential fault detection scenarios.
Specifications
| Feature | MC-S Series Control Units | MC-S Series Switches |
|---|---|---|
| Power Supply | 24 VAC/DC ± 10% (Control 1) 24 VDC ± 10% or 24/110/220 VAC (Control 2 & 6) | - |
| Power Consumption | < 2 VA (Control 1); < 4 VA (Control 2 & 6) | - |
| Safety Inputs | 1 N/O + 1 N/C (Controls 1 & 2) (x6 for Control 6) | - |
| Max Input Resistance | Red/Blue - 200 Ω; Green/Yellow - 150 Ω | - |
| Min. Approach Speed | Typically 10-17 mm/sec. | - |
| Safety Contacts | 1 N/O + 1 Semi Aux. (Control 1) 2 N/O + 1 N/C Aux. (Control 2) | 1 N/C + 1 N/O |
| Auxiliary Contacts | 1 N/C or 1 N/O | 1 N/C or 1 N/O |
| Auxiliary Contact Rating | 100 mA, 24 VDC and 230 VAC (Control 1) 2 A, 24 VDC and 230 VAC (Control 2 and 6) | 100 mA/230 VAC 100 mA/24 VDC |
| Relay Outputs | - | Control 6 Delayed Output (0.6-30 s) 3 N/O + 1 N/O Delayed, 1 N/C Aux. (Control 6) |
| N/C Operating Distance | - | On = 5 mm; Off = 11 mm (Type 1 and Type 3) On = 9 mm; Off = 12 mm (Type 2) On = 10 mm; Off = 13 mm (Type 2 stainless) |
| Max Switched AC | - | 4 A/250 VAC |
| Max Switched DC | - | 2 A/30 VDC |
| Min Switched Current/Voltage | - | 10 mA/10 V AC/DC |
| Impulse Withstand Voltage | 2500 V | - |
| Max Drop-Out Time | 25 m/sec | - |
| Max Output Fuse | 5 A quick acting on AC, 3 A quick acting on DC (3 A quick acting on AC/DC Control 6) | - |
| Reset Mode | Automatic/Manual | - |
| External Device Monitoring | N/C loop between x1 and x2 | - |
| Mounting | 35 mm (1.38 in.) DIN Rail | 4 x M4 screws, M18 x 1 mm pitch for MC-S3 |
| Case Material | Polycarbonate | ABS plastic - Type 1 & 2; nylon - Type 3; stainless steel - Type 2 stainless |
| Max Wire Size | 2 x 1 mm² (20 AWG) stranded 2 x 1.5 mm² (15 AWG) solid | Pre-wired cable to 10 m MC-S1, S2, Connector MC-SS2, MC-S3 |
| Weight | 147 g (5.2 oz.) - Control 1, 590 g (21 oz.) - Control 2, 990 g (35 oz.) - Control 6 | 100 g (3.5 oz.) plastic, 600 g (1-lb. 5-oz.) steel |
| Color | Red | Red or Stainless steel |
| Indication | LED 1: Green = Output Closed LED 2: Red = Power On (Controls 1 & 2) LED 2: Green = Power on (Control 6) | 1 x 106 |
| Mechanical Life | 1 x 106 | - |
| Protection | IP40 (NEMA 1) | IP67 (NEMA 6); (IP68 for stainless) |
| Operating Temperature | -10 to 55°C (14 to 131°F) | -10 to 55°C (14 to 131°F) Plastic -25 to 125°C (-13 to 257°F) Stainless |
| Humidity | 90% RH at 50°C (122°F) | 90% RH at 50°C (122°F) |
| Compliance Standards | EN954-1, EN1088, EN60204-1 | - |
| Approvals/Listings | CE marked for all applicable directives, UL and C-UL | - |
Note: Safety contacts are normally closed (N/C) when the guard is closed, the actuator is in place, and the machine is able to be started.
Dimensions
Detailed dimensional drawings are provided for Control Units 1, 2, and 6, as well as for Type 1, Type 2, and Type 3 switches and actuators. These include measurements in both millimeters and inches.
Ordering
| Model | Contacts | Wiring Entry | Part No. |
|---|---|---|---|
| CONTROL UNITS | |||
| Unit 1 MC-S1 Control (24VAC/DC) (1 switch input) | 1 N/O + 1 N/C Semi Aux. | - | 44531-0010 |
| Unit 2 MC-S2 Control (24VAC/DC + 110/220VAC) (1 switch input) | 2 N/O + 1 N/C Aux. | - | 44531-0020 |
| Unit 6 MC-S6 Control (24VAC/DC + 110/220VAC) (6 switch inputs) | 3 N/O + 1 N/O Delayed, 1 N/C Aux. | - | 44531-0040 |
| PLASTIC CASE SWITCHES | |||
| Type 1 MC-S1PC3 Switch & Actuator | 1 N/C + 1 N/O | 3 m cable | 44531-0100 |
| MC-S1PC10 Switch & Actuator | 1 N/C + 1 N/O | 10 m cable | 44531-0110 |
| MC-S1XCPC3 Switch & Actuator w/ signal contacts | 2 N/C + 1 N/O (N/C Aux. Contact) | 3 m cable | 44531-0150 |
| MC-S1XOPC3 Switch & Actuator w/ signal contacts | 1 N/C + 2 N/O (N/O Aux. Contact) | 3 m cable | 44531-0155 |
| MC-S1XCPC10 Switch & Actuator w/ signal contacts | 2 N/C + 1 N/O (N/C Aux. Contact) | 10 m cable | 44531-0160 |
| MC-S1XOPC10 Switch & Actuator w/signal contacts | 1 N/C + 2 N/O (N/O Aux. Contact) | 10 m cable | 44531-0165 |
| Type 2 MC-S2PC3 Switch & Actuator | 1 N/C + 1 N/O | 3 m cable | 44531-0200 |
| MC-S2PC10 Switch & Actuator | 1 N/C + 1 N/O | 10 m cable | 44531-0210 |
| MC-S2XCPC3 Switch & Actuator w/ signal contacts | 2 N/C + 1 N/O (N/C Aux. Contact) | 3 m cable | 44531-0250 |
| MC-S2XOPC3 Switch & Actuator w/signal contacts | 1 N/C + 2 N/O (N/O Aux. Contact) | 3 m cable | 44531-0255 |
| MC-S2XCPC10 Switch & Actuator w/ signal contacts | 2 N/C + 1 N/O (N/C Aux. Contact) | 10 m cable | 44531-0260 |
| MC-S2XOPC10 | 1 N/C + 2 N/O (N/O Aux. Contact) | 10 m cable | 44531-0265 |
| Type 3 MC-S3PCC Switch & Actuator | 1 N/C + 1 N/O | connector | 44531-0300 |
| STAINLESS STEEL CASE SWITCHES | |||
| MC-SS2XOSCC5 | 1 N/C + 2 N/O (N/O Aux. Contact) | connector + 5 m cable | 44531-0450 |
| MC-SS2XCSCC5 | 2 N/C + 1 N/O (N/C Aux. Contact) | connector + 5 m cable | 44531-0455 |
| MC-SS2X0SC6 | 1 N/C + 2 N/O (N/O Aux. Contact) | 6 m cable | 44531-0460 |
| MC-SS2XCSC6 | 2 N/C + 1 N/O (N/C Aux. Contact) | 6 m cable | 44531-0465 |
| Spare MC-S Type 1 Actuator, Plastic | - | - | 44531-0710 |
| Spare MC-S Type 2 Actuator, Plastic | - | - | 44531-0720 |
| Spare MC-S Type 3 Actuator, Plastic | - | - | 44531-0730 |
| Spare MC-SS2 Actuator, Stainless Steel | - | - | 44531-0740 |
Information regarding Universal Mounting Brackets and accessories is available on www.sti.com.
