Panasonic LT4H-DC24V ATL5111 — Multi-Range Multi-Function Digital Timer (24 VDC)

Panasonic LT4H Series · 8-Pin Plug-In · Time Range 0.001 s – 9999 h

The Panasonic LT4H-DC24V is a multi-range multi-function digital timer in the LT4H series. The "ATL5111" suffix in the title's reference number is the legacy / OEM cross-reference and the unit ships as a plug-in 8-pin timer with an 11-pin socket footprint adapter, with a wide time range (0.001 s to 9999 h) selectable on the front dial. The LT4H is the workhorse timer in machine-builder cabinets where a single SKU covers most timing functions (on-delay, off-delay, interval, repeat, etc.) and where the cabinet standard is 24 VDC control power.

At koeed.com we list the LT4H-DC24V as a cabinet-mounted timer relay. It is the right fit for sequencing short-cycle sub-events (valve actuation, brake release, lubrication pulse) that a PLC is often too slow or too granular to handle, and for retrofitting old machines that need a digital timer to replace an obsolete mechanical or analog unit.

Key Specifications

Datasheet Highlights

• Multi-range / multi-function design covers the most common timing modes (on-delay, off-delay, interval, repeat-cycle, etc.) with a single SKU — the cabinet standard is the LT4H-DC24V with a mode switch on the front.
• Time range from 1 ms to 9999 h covers anything from a brake-release pulse to a long-cycle lubrication interval.
• DPDT (2 × SPDT) output gives two isolated contact sets — useful when one timer drives both a 24 VDC solenoid and a 200 VAC contactor coil on the same machine.
• Plug-in 8-pin (or 11-pin with adapter) keeps the socket on the cabinet, so the timer itself can be swapped in seconds — important for high-MTBF applications.
• Repeat accuracy of ± 0.01 % is far better than a typical analog pneumatic or motor-driven timer, and is independent of the supply-voltage tolerance.
• 24 VDC coil version drops onto the same Phoenix Contact or Meanwell 24 VDC bus that feeds the PLC — no separate aux supply needed.

Typical Applications

• Sequencing of sub-events: short-cycle valve actuation, brake release, lubrication pulse, and tool-change interlocks that a PLC is sometimes too slow to handle cleanly.
• Packaging & filling lines: cut-to-length, index-dwell, and bottle-spout dwell timing on a form-fill-seal machine.
• Press & stamping: clutch / brake engagement delay, dwell at bottom-dead-centre, and material-feed delay on mechanical presses.
• Machine-tool spindles: pre-lube and post-lube timing on a CNC spindle, with the LT4H driving the lube pump and a flag back to the CNC.
• Process skids: chemical-feed pulse timing on dosing skids, where the LT4H pulses the metering pump at a fixed cycle.
• Building automation: HVAC damper and lighting delay, where a hard-wired timer is preferred over a software routine for simplicity.

Related Modules & Cross-Reference

A timer swap is a fast PM. While the cabinet is open, KOEED can ship the LT4H-DC24V with the matching socket, the relay it drives, and the 24 VDC supply:

Browse the KOEED timers & relays and contactors & motor protection collections to bundle a full cabinet-rebuild kit.

Warranty & Authenticity

Each LT4H-DC24V is supplied as a brand-new, factory-sealed Panasonic timer with lot code and date code recorded for full traceability. KOEED sources from authorised Japanese and EU distribution; counterfeits are rejected at incoming inspection. A 12-month limited warranty covers manufacturing defects; KOEED handles return shipping and replacement from EU/US stock at no charge.

Cross-reference: LT4H-DC24V · ATL5111 · Panasonic LT4H digital timer · 24 VDC multi-function · 8-pin plug-in · B2B industrial automation spares. KOEED Automation — independent distributor of industrial automation spare parts, including Allen-Bradley, Siemens, Mitsubishi, Omron, Schneider Electric, FANUC, Yaskawa, Panasonic, and Keyence.