Why Choose the IMO SMT-CD-R20-V3 iSmart Intelligent Relay?
The IMO SMT-CD-R20-V3 is a versatile 24 V DC iSmart V3 intelligent relay with integrated HMI and RS485 Modbus communications, designed for compact industrial automation, machinery and control panel applications. It combines programmable logic, local operator controls and communications with 12 DC digital inputs and 8 relay outputs.
As part of the IMO iSmart V3 programmable relay series, the SMT-CD-R20-V3 also provides 4 configurable 0–10 V analogue inputs within its DC input configuration. This allows both discrete switching devices and variable-output sensors to be incorporated into the same controller, while its built-in text HMI provides local status information and programmable function keys.
The SMT-CD-R20-V3 operates from a 24 V DC supply and incorporates RS485 Modbus communications and IMO Link functionality for integration with other automation equipment. It also features 2 high-speed inputs operating at up to 1 kHz, 12-bit analogue input resolution and powerful Ladder Logic and Function Block Diagram programming capabilities.
Key Advantages
- Combines programmable control, HMI and RS485 Modbus communication in one compact device.
- 12 DC digital inputs provide substantial onboard input capacity.
- Includes 4 configurable 0–10 V analogue inputs for variable sensor signals.
- 8 relay outputs rated up to 8 A for versatile load switching.
- Integrated text HMI with programmable function keys supports local operation and monitoring.
- RS485 Modbus and Link functionality simplify integration with compatible automation equipment.
- 2 high-speed inputs up to 1 kHz support pulse and high-speed counting applications.
- Expandable with compatible IMO iSmart digital, analogue, temperature and communication modules.
Key Features
- IMO iSmart V3 intelligent relay.
- 24 V DC operating supply.
- 12 DC digital inputs.
- 4 configurable 0–10 V analogue inputs.
- 12-bit analogue input resolution.
- 8 relay outputs.
- 8 A relay output rating.
- 2 high-speed inputs up to 1 kHz.
- Integrated text HMI.
- Programmable function keys.
- RS485 Modbus communication.
- IMO Link functionality.
- Ladder Logic programming.
- Function Block Diagram (FBD) programming.
- PID control, maths functions and retentive data registers.
- Expandable with compatible IMO iSmart expansion modules.
Integrated HMI and Modbus Control for Compact Automation
The SMT-CD-R20-V3 brings programmable logic, analogue monitoring, local operator interaction and serial communications together within one compact controller. Its integrated HMI can provide machine information and operator controls directly at the relay, while the four 0–10 V DC analogue-capable inputs allow variables such as pressure, level, position and other process measurements to be incorporated into the control logic.
Built-in RS485 Modbus communications allow the controller to exchange data with compatible drives, HMIs, controllers and other industrial devices. Combined with high-speed inputs, PID functionality and expandable I/O, this makes the SMT-CD-R20-V3 suitable for applications that require capabilities beyond conventional timer and relay-based control.
Typical Applications
- Industrial machine automation.
- Pump, fan and motor control systems.
- 0–10 V sensor monitoring and control.
- RS485 Modbus-connected automation systems.
- Conveyor and material handling equipment.
- HVAC and building automation.
- Packaging and production machinery.
- OEM machinery and electrical control panels.
