PANASONIC LT4H-W User's Manual
Summary
The LT4H-W is a durable, IP66-rated digital timer designed for reliable industrial automation and control systems. Offering massive time ranges up to 9999 hours, this versatile unit supports various outputs (relay/transistor) and features an easy-to-read display optimized for integration into narrow panels. This manual provides comprehensive technical documentation, covering installation requirements, electrical specifications (AC/DC voltage), wiring instructions, operational modes (e.g., ON-start flicker, integrating input), advanced self-diagnosis procedures, and maintenance best practices for professional industrial technicians and automation engineers.
Page 1 Text Content
LT4H-W
DIN 48 SIZE
LT4H-W
DIGITAL TIMER
UL File No.: E122222 FEATURES
CSA File No.: LR39291 1. Wide time range 5. Conforms to IP66’s Weather The operation time range covers from Resistant Standards 0.01 sec. to 9999 hours. The water-proof panel keeps out water The individual setting can be performed and dirt for reliable operation even in on each of 1 and 2 timers. poor environments. 99.99s 99min59s 99h59min 6. Screw terminal and Pin Type are 999.9s 999min 999.9h Both Standard Options
1.890 9999s 9999h The two terminal types are standard
2. Bright and Easy-to-Read Display options to support either front panel A brand new bright 2-color back light installation or embedded installation. LCD display. The easy-to-read screen in 7. Changeable Panel Cover
64.5 2.539 any location makes checking and setting Also offers a black panel cover to meet
procedures a cinch. your design considerations.
mm inch
3. Simple Operation 8. Conforms With EMC and Low Seesaw buttons make operating the unit Voltage Directives even easier than before. Conforms with EMC directives 4. Short Body of only 64.5 mm 2.539 (EN50081-2/EN50082-2) and low inch (screw terminal type) or 70.1 mm -voltage directives (VDE0435/Part 2021) 2.760 inch (pin type) for CE certification vital for use in With a short body, it is easy to install in Europe.
8 Pin type 11 Pin type Screw terminal
even narrow control panels. 9. Good performance
All this at an affordable price to provide you with unmatched cost performance.
PRODUCT TYPES Time range Operation mode Output Operation voltage Power down insurance Terminal Part No.
8 pin LT4HW8-AC240V
100-240 V AC 11 pin LT4HW-AC240V
Screw LT4HW-AC240VS 8 pin LT4HW8-AC24V
Relay
24 V AC / 24 V DC 11 pin LT4HW-AC24V
Screw LT4HW-AC24VS
Pulse input:
99.99s 8 pin LT4HW8-DC24V
• Delayed one shot
• OFF-start flicker 12-24 V DC 11 pin LT4HW-DC24V
• ON-start flicker
99min59s Screw LT4HW-DC24VS
Available
999.9min
Integrating input: 8 pin LT4HWT8-AC240V
99h59min
• Delayed one shot
999.9h 100-240 V AC 11 pin LT4HWT-AC240V
• OFF-start flicker
• ON-start flicker Screw LT4HWT-AC240VS 8 pin LT4HWT8-AC24V
Transistor
24 V AC / 24 V DC 11 pin LT4HWT-AC24V
Screw LT4HWT-AC24VS 8 pin LT4HWT8-DC24V
12-24 V DC 11 pin LT4HWT-DC24V
Screw LT4HWT-DC24VS
* A rubber gasket (ATC18002) and a mounting frame (AT8-DA4) are included.
Page Summary Contents For PANASONIC LT4H-W User's Manual
Manual Details
| Brand | Panasonic |
|---|---|
| Pages | 7 |
| File Size | 291.80 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What are the operating temperature and voltage ranges?
The operating temperature range is -10°C to +55°C, and the unit operates on voltages from 85% to 110% of its rated voltage.
Is this model suitable for use in controlled environments?
Yes, it’s weatherproof and conforms to IP66 standards, making it ideal for industrial settings.
How do I ensure easy installation on narrow panels?
It provides short body types (e.g., 64.5 mm or 70.1 mm) and includes screw terminal/pin type options designed for tight spaces.
Does the unit retain settings during a power failure?
Yes, it uses EEP-ROM memory, which allows for data retention even after power interruptions.