R4D EtherCAT IO Module
Product Introduction
R4D — multifunctional and customizable. The R4D is a high-performance EtherCAT fieldbus distributed IO module launched by INEXBOT, measuring 122×200mm. It supports a 100Mbps bus rate and distributed clock functionality, integrates digital, analog, encoder, and CAN expansion interfaces, and can be functionally customized per user requirements.
Product Specifications
| Item | Parameter |
|---|---|
| Dimensions | 122 × 200mm |
| Bus Rate | 100Mbps |
| Distributed Clock | Supported |
| Power Supply | 24V DC |
| Digital Inputs | 16 inputs, polarity configurable |
| Digital Outputs | 16 outputs (4 relay, 12 MOSFET) |
| Analog Inputs | 2 channels, 0~10V |
| Analog Outputs | 2 channels, 0~10V |
| Encoder | AB-phase counting (differential signal interface) |
| Expansion Interface | CAN |
| Operating Temperature | 0~60°C |
| Relative Humidity | 95%, non-condensing |
| Communication Cycle | 200us minimum |
Product Advantages
Multifunctional
The R4D integrates digital input/output, analog input/output, and encoder interface functions in a single module, satisfying the connectivity needs of various signal types at industrial sites, reducing device variety and simplifying system configuration.
PWM Interface Added
The R4D supports PWM output, which can be used in applications such as speed control and dimming, expanding the module's application range.
Customizable
The R4D supports functional customization per user requirements, flexibly adapting to the specific needs of different application scenarios.
Expandable
The R4D has a built-in CAN expansion interface, supporting connection of more external devices via the CAN bus for system function expansion.
Reliable Quality
The R4D uses an industrial-grade design, supports 24V DC power, an operating temperature range of 0~60°C, and withstands 95% relative humidity (non-condensing), adapting to complex industrial environments. With a 100Mbps bus rate and a minimum communication cycle of 200us, it ensures high-speed, stable data transmission.
Product Appearance

Q&A
Q: What is the difference between the R4D and the R4C?
A: The R4D and R4C have the same dimensions (122×200mm) and identical digital input/output and analog interface configurations. The main difference is the expansion interface: the R4D is equipped with a CAN expansion interface, while the R4C has a reserved CAN&485 interface (the R4C's interfaces are in reserved status, while the R4D's CAN interface is a formal function).
Q: Which EtherCAT functions does the R4D support?
A: The R4D supports a 100Mbps bus rate and distributed clock (DC) functionality, with a minimum communication cycle of 200us. It can connect with INEXBOT controllers and master station devices that support the standard EtherCAT protocol.
Q: Which encoder types does the R4D interface support?
A: The R4D supports AB-phase incremental encoder input using a differential signal interface.
Q: Does the R4D support PWM output?
A: Yes. The R4D has a built-in PWM output interface, which can be used in applications such as speed control and dimming.
Q: What is the operating temperature range of the R4D?
A: The R4D operating temperature range is 0~60°C, with an even wider storage temperature range, making it suitable for industrial site deployment.
Q: Which devices can connect to the R4D's CAN expansion interface?
A: The R4D's CAN expansion interface can connect to devices supporting CANopen or custom CAN protocols, such as sensors, remote IO expansion modules, and drives.