imo gsl-ry2c plc smart i/o 20.4-28.8vdc
MPN: GSL-RY2C
Alt. SKU: GSLRY2C

Why Choose the LS Electric GSL-RY2C Modbus RTU Relay Output Module?
The GSL-RY2C Smart I/O module provides 16 SPDT relay outputs over an RS-485 Modbus RTU interface. With 2 A per channel at 24 V DC or 220 V AC, it enables decentralized control of high-current devices—ideal for industrial automation, building management, and remote switching applications where distributed relay outputs are needed.
Key Features of the GSL-RY2C Relay Output Module
- 16 Relay Outputs: SPDT form C contacts, 2 A at 24 V DC or 220 V AC per channel.
- Modbus RTU Interface: RS-485 connection with up to 32 nodes on a single bus.
- Wide Voltage Range: 20.4–28.8 V DC power input.
- Diagnostics: LEDs for power, RS-485 activity, and individual relay status.
- Compact Form Factor: 176.6 × 50 × 39 mm; DIN-rail mountable.
- Temperature Range: 0 °C to +50 °C operating.
How to Install the LS Electric GSL-RY2C Module
Mount the GSL-RY2C on a standard 35 mm DIN rail. Wire 24 V DC to the power terminals. Connect your RS-485 network cable to the Modbus port and daisy-chain up to 32 devices with proper termination. Wire loads to the relay output terminals (NO/NC). Set the Modbus address and baud rate via onboard DIP switches. Power on and confirm communication and relay states via the LEDs.
LS Electric GSL-RY2C – 16 SPDT Relay Outputs via Modbus RTU
The GSL-RY2C delivers versatile relay switching remotely, reducing the need for local relay cards. Its SPDT contact design supports mixed AC and DC loads, while the Modbus RTU interface offers industry-standard communication over RS-485. Integrated LEDs and DIP-switch configuration simplify setup and diagnostics in any control cabinet.
Engineered for industrial environments, the module’s rugged enclosure and wide temperature tolerance ensure reliable operation in harsh conditions.
Frequently Asked Questions About the GSL-RY2C
- What load types can the relays switch?
- How many modules can I put on one RS-485 bus?
- What Modbus function codes are supported?
- Can I hot-swap this module?
- How do I configure the Modbus address?
Key Benefits:
- Provides 16 high-current relay outputs on Modbus RTU
- Reduces central relay panel complexity
- Standard RS-485 bus supports up to 32 modules
- LED diagnostics for power, comms, and individual relays
Applications:
- Building automation relay control
- Remote valve and actuator switching
- Distributed machine control panels
- Industrial process automation
Frequently Asked Questions
The SPDT contacts can handle resistive or inductive loads up to 2 A at 24 V DC or 220 V AC per channel.
Up to 32 Modbus RTU slave modules per segment, subject to master capability and wiring topology.
Supports Function Codes 5 (Write Single Coil) and 15 (Write Multiple Coils) for relay control, and 2 (Read Discrete Inputs) for status monitoring.
No—power down the RS-485 segment before removal or insertion to avoid bus errors.
Use the onboard rotary switch and DIP switches to set the module’s address (1–247) and baud rate before powering on.