KOYO D4-RSDC – 24 VDC Remote I/O Slave Module for DL405 Remote Bases

If you’re extending a DL405 system into remote cabinets, the KOYO D4-RSDC is the dependable 24 VDC-powered Remote I/O Slave that sits in the CPU slot of a DL405 remote base and links your field I/O back to a D4-RM master. From my experience, it’s a straightforward way to reduce home-run wiring, keep I/O close to the machine, and maintain stable communication over a multi-drop line.

Our Order Process & Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 24 VDC-powered remote slave – Designed to install in the CPU slot of a DL405 remote base, powered from a 24 VDC cabinet supply.
• Works with D4-RM master – Pair it with a KOYO D4-RM in the local rack to create a robust DL405 Remote I/O network.
• Multi-drop network topology – Typically supports multiple remote bases over shielded twisted pair, which helps simplify plant-wide I/O distribution.
• Addressing via DIP switches – You might notice the setup is quick: set the remote base address, wire the trunk, and you’re usually online in minutes.
• Clear status indication – Front-panel LEDs for power and comms make first-line diagnostics faster on the shop floor.
• DL405 I/O flexibility – Populate the remote base with DL405 digital, analog, or specialty modules as needed.

Technical Specifications

Application Fields

The D4-RSDC tends to be used wherever you want DL405 I/O near the equipment but controlled from a central rack:

• Assembly lines and material handling cells with distributed I/O islands
• Packaging machines where sensors/valves are spread across multiple cabinets
• Process skids (pumps, dosing, filtration) that report back to a main PLC
• Retrofits of legacy DL405 systems that need additional remote racks without rewiring

Advantages & Value

• Keep wiring local – Reduces long cable runs and junction complexity, often cutting installation time and cost.
• Stable comms in industrial environments – The Remote I/O link, when wired with shielded twisted pair and proper termination, has proven reliable in most plant conditions.
• DL405 ecosystem compatibility – Works with widely used DL405 bases and modules, minimizing spares and training.
• Scalable – Add remote bases as your layout grows without redesigning the central panel.
• Procurement-friendly – Straightforward specification, reasonable lead times, and broad in-field familiarity among technicians.

Installation & Maintenance

• Cabinet & environment – Mount the DL405 base on a rigid panel inside a ventilated enclosure; avoid excessive vibration, dust, and moisture. Maintain ambient within 0–60°C.
• Power & wiring – Feed clean 24 VDC to the D4-RSDC. Use shielded twisted pair for the Remote I/O trunk; keep shields grounded at one end to limit noise loops.
• Addressing & termination – Set the remote base address via DIP switches. Apply network termination at the physical ends of the segment; keep stubs short.
• Safety – Power down before installing or removing modules; DL405 modules are typically not hot-swappable.
• Routine checks – Periodically re-tighten terminals, inspect cable shields, and clean dust with dry air. Firmware settings rarely change, but keep a backup of configurations.

Quality & Certifications

• Compliance: CE, UL/cUL, and RoHS are commonly available for DL405-family modules (we can share the specific certificates for D4-RSDC on request).
• Manufacturer practice: Industrial-grade build suitable for control panels and factory environments.
• Warranty support: 365-day warranty provided by us; replacement or repair handling per our RMA process.