IDEC SX8R-ECB1 Remote I/O Head/Bus Coupler Module

The SX8R-ECB1 is the part number for an IDEC SX8R Series Bus Coupler Module.

Unlike standard fixed controllers, this device functions as a remote I/O head/bus coupler that allows you to distribute I/O drops across a factory floor over Ethernet while linking them directly back to a central master PLC or SCADA system.

The essential hardware and network specifications for this module include:

Network & Multi-Protocol Support

One of the distinct features of the SX8R series is its ability to support multiple industrial protocols simultaneously, making it highly versatile for mixed-brand architectures:

• EtherNet/IP (functions as an Adapter/Slave)

• Modbus TCP (functions as a Server/Slave)

• CC-Link IE Field Basic (functions as a Slave station)

• Simultaneous Connections: Can communicate with two distinct master stations at the same time (e.g., a PLC controlling via EtherNet/IP while an HMI logs data over Modbus TCP).

Interface & Hardware Design

• Terminal Type: Screw Terminals (Note: the variant SX8R-ECB4 uses push-in terminals).

• Physical Ports: 2 x RJ45 Ethernet Ports (10BASE-T / 100BASE-TX with Auto MDI/MDI-X).

  • Port 1: Used for industrial fieldbus network protocols.

  • Port 2: Reserved for maintenance communication and software configuration.

• Power Supply Requirement: 24 V DC (Acceptable range: 20.4 to 28.8 V DC).

• Current Draw: Max 0.85 A at 24 V DC under maximum load conditions.

I/O Expansion Limits

The bus coupler acts as a baseless brain; you slide and lock expansion modules directly onto its right-hand side:

• Module Compatibility: Seamlessly compatible with over 40 existing IDEC MicroSmart FC6A PLC I/O modules (Discrete, Analog, Thermocouple, RTD, and mixed blocks).

• Expansion Capacity: Supports up to 15 expansion modules per node.

  • Note: Up to 7 modules can be attached directly. Expanding to 8–15 modules requires the addition of an expansion interface module (Part No. FC6A-EXM2).

• Max Point Matrix: Up to 480 discrete points, 120 analog inputs, or 60 analog outputs per drop.

Physical & Environmental

• Dimensions (W x H x D): 47.2 mm x 90 mm x 73 mm (Compact, space-saving layout).

• Mounting: Standard 35 mm DIN rail or direct panel mounting (via hook clips).

• Operating Temperature: Extreme wide-range performance from -25°C to +65°C (ideal for harsh or unconditioned control cabinets).

• Enclosure Rating: IP20 protection.

• Certifications: Class I Division 2 (Hazardous Locations), CE, UL/cUL listed, and UKCA.