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Shihlin Electric Relay RSM/RSL/RST Series | Industrial Control

Shihlin Electric's general-purpose relay series for control panels, switchboards, and automation. Multiple contact forms, AC/DC options, and socket compatibility for flexible wiring.

Professional Intermediate Relay Solutions for Industrial Control & Automation

Shihlin Electric's RSM, RSL, and RST relay series deliver compact, reliable signal switching and isolation for control panels, machinery, and factory automation systems with multiple contact configurations and coil voltage options.

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Shihlin Electric · Relay

RELAY | RSM / RSL / RST Series

A general-purpose relay series for control panels, switchboards, and equipment control circuits, offering multiple contact configurations, AC/DC coil voltage options, and socket combinations for flexible wiring and easy maintenance.

Product Overview

This series is Shihlin Electric’s general-purpose intermediate relay lineup, covering the RSM, RSL, and RST series. With multiple contact forms and socket options, it is suitable for signal switching, isolation, and control applications in control panels, machinery, switchboards, and automation systems.

Panel Control Signal Isolation Interlock Control Maintenance Friendly

Features

  • Compact design for easy installation
  • High sensitivity
  • Well-structured design with wide application range
  • Optional test button for easy debugging and maintenance
  • Complete specification lineup with mechanical and LED indicators
  • Non-polar DC coil wiring option (depending on model) for easier field wiring

Series Lineup & Application Suggestions

RSM Series Compact relay / Multiple contact options
  • Typical model example: RSM4CD024L
  • Suitable for general control signal switching, equipment interlock, and panel control
  • Socket-compatible design for easier maintenance and replacement
Recommended for: control panels, equipment I/O isolation, and PLC interface relays.
RSL Series Multi-contact relay / Expanded contact applications
  • Typical model example: RSL4CA024L
  • Suitable for multi-circuit signal transfer and panel control circuit expansion
  • Available in multiple AC/DC coil voltage options
Recommended for: auxiliary control in switchboards, alarm and status signal distribution.
RST Series Socket type relay / Clear terminal layout and easy wiring
  • Typical model example: RST2CA024L
  • Suitable for control circuits and equipment terminal signal transfer
  • Supports socket and multiple terminal configurations for easy field service
Recommended for: control boxes, machine internal control, and frequent replacement scenarios.

Type Designation (Simplified)

Series
RSM / RSL / RST
Contact Form
e.g., 1C / 2C / 4C (depending on series)
Coil Voltage
AC: 24 / 48 / 110 / 230V; DC: 24 / 110V (depending on model availability)
Options / Suffix
L: LED indicator; LT: Mechanical + LED + test button (depending on model)
Actual available models may vary. Please refer to the latest catalog and quotation list for exact contact forms, socket types, and indicator configurations.

Typical Applications

  • Intermediate control and signal amplification inside control panels / switchboards
  • PLC digital output isolation and signal transfer
  • Status interlock and alarm output switching in motor control circuits
  • Multi-point signal distribution in automation equipment
  • Panels requiring frequent maintenance and quick relay replacement (socket type)

Coil Resistance Reference (Ω)

Series / Model DC AC
24V 110V 24V 48V 110V 230V
RSM2C / RSM4C 640 13,000 180 640 4,430 16,500
RSL2C 640 13,000 180 640 4,430 16,500
RSL4C 360 6,800 80 320 1,680 8,000
RST1C / RST2C 1,100 22,800 240 1,085 6,300 23,000
* Coil resistance values are compiled from the provided coil resistance table and are intended for selection and engineering reference.
* For official product specifications (contact rating, dielectric strength, operate/release time, temperature conditions, etc.), please refer to the latest catalog and approved product datasheet.
* For website publishing, it is recommended to add a “Download Catalog” button and an “Ordering Model Table” (full model code, coil voltage, indicator type, socket model).
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How can you reduce control panel assembly time and maintenance costs while ensuring reliable signal isolation and switching?

Shihlin Electric's RSM/RSL/RST relay series features socket-compatible design enabling quick installation and replacement, multiple contact configurations (1C, 2C, 4C), and optional LED indicators for easier debugging. This eliminates complex wiring and reduces field service downtime, allowing your control panels to achieve faster time-to-market and lower total cost of ownership. Request a technical consultation to optimize your panel design with our proven relay solutions.

Built on Shihlin Electric's 60+ years of OEM/ODM technical expertise, these relays deliver superior reliability and precision control essential for modern factory automation and industrial equipment control. Whether you require panel control signal amplification, PLC digital output isolation, status interlock switching in motor control circuits, or multi-point signal distribution in automation equipment, the RSM/RSL/RST series provides the performance and flexibility your operation demands. Contact our professional technical support team today to discuss your specific control requirements and discover how Shihlin Electric's relay solutions can enhance your system's efficiency, reliability, and maintainability.