OVERVIEW

Official designation: PANASONIC LT4H-AC240VS (LT4H Series, Digital Timer)

Role/Application: The LT4H is a multi-function digital timer for automation systems, providing precise time delay control with a wide timing range in a compact 1/16 DIN panel-mount form factor.

KEY SPECS SUMMARY

Power: 100 to 240 VAC, 50/60 Hz

Interfaces / Ports: Screw terminal type, 1 Form C relay output

Indicators: 4-digit LCD backlight display (Red for elapsed, Yellow for setting)

Operating Temp: Minus 10 to plus 55 degrees C

Platform / Compatibility: 1/16 DIN 48 mm x 48 mm panel mount, IP66 front panel rating

Limit: Contact rating 5A at 250 VAC (resistive load), Timing range 0.001 s to 999.9 hr

Lifecycle: Discontinued, replacement is the LT4H-W series

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: How many timing modes are available for selection on the LT4H-AC240VS module?

A: The timer supports 8 operational modes, selectable via internal DIP switch settings.

Wiring & Installation:

Q: What are the primary dimensions for the body of the screw terminal type timer?

A: The screw terminal type unit has a short body depth of 64.5 millimeters.

Troubleshooting & Compatibility:

Q: What is the required minimum input signal width for external control inputs?

A: The minimum input signal width must be 1 millisecond or 20 milliseconds, set via a DIP switch.

Replacement & Upgrades:

Q: What is the recommended substitute timer series for the discontinued LT4H models?

A: The manufacturer recommends the newer LT4H-W series digital timers as a replacement.