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  3. Control and Electrical Equipment
  4. Safety Equipment
  5. Safety Relay
  6. Safety Relay Unit "SM1-301"

Safety Relay Unit "SM1-301"

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last updated:Aug 26, 2025

ライン精機
ライン精機
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Safety relay unit

- Space-saving type with a width of 23mm - Applicable to safety category 4 environments - Up to 25 units of the SS4 series can be connected in series (even in multiple connections, applicable to safety category 4 environments) - Capable of monitoring contacts for emergency stop switches and limit switches - Equipped with 3 circuits of safety output (N.O.) with a forced-guided contact mechanism

    Safety Relay
SM1.jpg

Safety Relay Unit "SM1-301"

SM1.jpg
SM1.jpg
  • Related Link - https://www.line.co.jp/product/category/safety/#re…

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basic information

Power Supply Voltage: AC / DC 24V (-15%/+10%) Power Consumption: 5VA (AC) 2.5W (DC) Short Circuit Protection Circuit: Electronic Fuse Input: Number of Input Channels: N.O. Input x 2 Channels Input Current: 166mA Max. per Channel Safety Output: N.O. Contacts x 3 (AC250V 6A (resistive load) / AC250V 5A (inductive load) / DC24V 5A (inductive load)) Auxiliary Output: N.C. Contact x 1 (AC250V 5A (resistive load) / AC250V 5A (inductive load) / DC24V 5A (inductive load)) PL PLe (Safety Category 4), SIL 3 Contact Material: AgSnO₂ Minimum Contact Rated Current: DC5V 10mA Response Time: Less than 20ms Operating Ambient Temperature: -20 – +60°C Weight: 180g Protection Structure: IP20 MTTFd: >100 years

Price range

P2

Delivery Time

Please contact us for details

Applications/Examples of results

- Stopping the equipment in a dangerous state (door open state) to ensure the safety of workers - Transporting materials to the designated position (positioning) in semiconductor manufacturing equipment

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Non-contact safety switch/relay "Safety Equipment" product catalog

Non-contact safety switch/relay "Safety Equipment" product catalog

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News about this product(2)

2026 MepTech in Nagoya (Measurement and Measurement Comprehensive Technology Exhibition)

[Line Seiki] "Notice of Participation in the 2026 MepTech in Nagoya (Comprehensive Measurement and Measurement Technology Exhibition)"

  • Seminar・Event

Our company will exhibit at the 2026 MepTech in Nagoya (Comprehensive Measurement and Measurement Technology Exhibition) and plans to showcase safety products with Gemba Reporter. Please be sure to stop by booth number "91" when you visit.

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[Line Seiki] Launches Safety Equipment (Non-contact Safety Door Switch) SS Series

  • Product news

[Line Seiki] Announcement of "Safety Equipment" Release Our company will sell "Safety Equipment (Non-contact Safety Door Switch + Safety Relay)." This switch is installed at the opening and closing parts to monitor safety. It is a sensor that does not disable safety functions. In addition to the resin type, we also offer a robust stainless steel type. [Non-contact Safety Door Switch] SS2 Series (Standalone / Relay Unit Combined) SS3 Series (Standalone Type) SS4 Series (Dedicated for Relay Unit Combined) [Safety Relay Unit] SM1-301

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Company information

ライン精機

ライン精機

Testing, Analysis and Measurement

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Since our founding in 1949, in the untapped field of counters (counting devices), our fundamental philosophy has been passed down through the years as we have expanded our business into various sectors. It is people who create products, and it is also people who use those products. No matter how much the times change, we believe that it is people who generate new value, and without connections with others, we cannot create the products that society demands. Our strength lies in the technical skills and connections we have cultivated over many years of history. Each individual strives to improve themselves and holds high aspirations, while valuing connections with all people. By combining diverse insights and experiences, we will contribute to building the future with new ideas that are not constrained by existing frameworks.

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