Panasonic / NAiS / Matsushita Electric Works PM4H-A Multi-Range Timer

The PM4H-A is a multi-range analog timer engineered for industrial automation and process control. This compact unit delivers eight distinct operation modes—including Pulse ON-delay, Pulse Flicker, Differential ON/OFF-delay, and Power ON-delay—with 16 selectable time ranges spanning 1 second to 500 hours. A 0 setting enables instantaneous output operation for applications requiring immediate switching response.

– Technical Specifications

Time accuracy is held to ±0.3% operating time fluctuation (0.1s to 1h range), ±5% setting error at full-scale, ±0.5% voltage error across 85–110% rated voltage, and ±2% temperature error across −10 to +50°C ambient. The 1s range carries ±10ms tolerance. Minimum power-off time is 0.1s; minimum signal input time is 0.05s.

The front panel achieves IP65 protection against water splashes and dust. Contact arrangement varies by model: PM4H-A and PM4H-S provide Timed-out 2 Form C; PM4H-M provides Timed-out 1 Form C plus Instantaneous 1 Form C. Contact material uses silver alloy with gold flash, rated for 5A 250V AC (resistive load). Initial contact resistance is 100mΩ maximum at 1A 6V DC. Mechanical contact life reaches 2 × 10⁷ cycles; electrical life is 10⁵ cycles at rated control capacity. Insulation resistance is minimum 100MΩ at 500V DC.

– Key Features

• Sixteen selectable time ranges: 0.1s to 1s, 0.5s to 5s, 1s to 10s, 5s to 50s (seconds); 0.1 min to 1 min, 0.5 min to 5 min, 1 min to 10 min, 5 min to 50 min (minutes); 0.1h to 1h, 0.5h to 5h, 1h to 10h, 5h to 50h, 10h to 100h, 50h to 500h (hours)
• Eight operation modes for flexible timing control
• Short body design for space-constrained installations
• Pin or screw terminal options for integration flexibility

– Electrical Specifications

Rated operating voltages: 100–240V AC (50/60Hz), 48–125V DC, 24V AC/DC, or 12V DC. Power consumption: approximately 10VA at 100–240V AC; 2.5VA at 24V AC; 1.5W at DC ratings. Operating voltage tolerance is 85–110% of rated value at 20°C coil temperature.

– Typical Applications

Industrial automation, process sequencing, relay logic control, and applications requiring variable delay, one-shot, or on-flicker timing functions.