Koyo D4-32TD2 – 32‑Point DC Transistor Output Module for DL405 Systems

The Koyo D4-32TD2 is a high‑density DC output module for the DirectLOGIC DL405 platform. From my experience, it’s the go-to when you need fast, reliable 24 VDC control for coils, lamps, small actuators, or interposing relays—without the wear you get from relay contacts. You might notice that it tends to simplify wiring on larger machines because you get 32 outputs in one slot, and the sourcing (PNP) topology typically lines up with modern sensor/actuator standards.

Company’s Order Placement Process and Guarantees

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

Key Features

• 32 DC transistor outputs (sourcing, PNP) – Designed for 12–24 VDC loads; faster switching than relay cards in most cases.
• High‑density in one slot – Frees up base capacity on DL405 racks for additional I/O or specialty modules.
• Grouped commons – Typically arranged in groups to simplify power distribution and fusing at the panel level.
• Backplane‑powered logic – No separate logic supply; only the external 24 VDC load supply is required for field devices.
• Noise‑resistant design – Solid‑state outputs help reduce contact bounce and extend life under frequent switching.
• DL405 ecosystem compatible – Works with common DL405 bases and CPUs, which seems to be the most cost‑efficient route for brownfield expansions.
• Easy maintenance – LED status indication per point (typical on DL405 DC output modules) speeds up troubleshooting on site.

Technical Specifications

Application Fields

The D4-32TD2 fits best in machines where you want fast, clean DC switching. Typical examples:

• Packaging and labeling lines – driving valves, gates, and indicator stacks with rapid cycle times.
• Material handling & conveyors – controlling diverters, DC brake releases, and small actuators.
• Automated assembly – outputting enable/step/direction signals to motion devices (through appropriate drives).
• Process skids – switching pilot relays/SSRs for heaters, pumps, and alarm beacons.
• Testing fixtures – higher switching frequency than relays, which typically improves repeatability.

Feedback we hear a lot: maintenance teams like the clear channel status LEDs and the fact that sourcing outputs match how most plants standardize 24 VDC wiring now.

Advantages & Value

• Reliability – Solid‑state outputs avoid mechanical wear; in many cases this cuts unplanned downtime versus relay cards.
• Compatibility – Native fit for DL405 racks and CPUs; easy drop‑in for expansions or replacements.
• Cost control – 32 points per slot usually means smaller racks or fewer bases, saving panel space and wiring time.
• Supportability – Widely used module with abundant documentation and long market presence.

Installation & Maintenance

• Panel environment – Install in a ventilated enclosure; maintain ambient 0–60°C and keep dust/oil mist under control.
• Mounting – Seat the module firmly in a DL405 base on DIN rail or panel. Verify the backplane latch fully engages.
• Wiring – Use correctly sized conductors for the load current. Group commons as designed, and fuse each group or load appropriately.
• Inductive loads – Add flyback diodes or surge suppression on DC coils to protect the transistors and reduce EMI.
• Grounding – Bond the enclosure and follow a single‑point 0V reference scheme to minimize noise.
• Maintenance – Periodically check terminal tightness, clean dust with dry air, and review output diagnostics. Firmware updates are typically CPU‑side; I/O modules usually don’t require updates.

Quality & Certifications

• CE and UL/cUL compliant (typical for DL405 I/O modules)
• RoHS compliant
• Manufacturer’s policy: standard factory quality controls apply
• Our warranty coverage: 365 days

Recommended Accessories & Compatible Bases

To round out a DL405 setup, these pieces typically pair well with D4-32TD2:

• DL405 Bases: D4-04B-1 / D4-06B-1 / D4-08B-1 (choose slots based on I/O count and CPU).
• CPUs: D4-454 or D4-450 (depending on program size and communication needs).
• Output protection: inline fuses per group and diode suppression for solenoids.
• Interposing: DIN‑rail relays or SSRs where higher load currents are required.