B1DF

B1D-F – Product Description

• The B1D-F is a multi-range ON-delay electronic timer from EAPL’s B-Series.

• Designed to provide a time delay between power application and relay operation.

• Features front dial for precise time adjustments, range selection switches, and LED indicator for power status.

• Compact DIN-rail or panel mountable enclosure, built for industrial use.

Key Specifications

• Function: ON-delay timer.

• Supply Voltage: Wide range versions available (typically 24 V to 240 V AC / 24 V to 220 V DC in X-version).

• Time Range: Adjustable from 0.6 seconds to 60 minutes, selectable via range switches (seconds/minutes, x1/x10 multipliers).

• Output: 2 change-over (C/O) relay contacts rated at 5 A, 250 VAC / 28 VDC resistive load.

• Power Consumption: Approx. 5 VA (AC) or 1 W (DC).

• Timing Accuracy:

  • Setting accuracy: ±10% of full scale ±100 ms.

  • Repeat accuracy: ±1% ±100 ms.

  • Recovery time: Minimum 100 ms.

• Environmental Ratings:

  • Operating temperature: –10 °C to +55 °C.

  • Storage temperature: –25 °C to +80 °C.

  • Humidity: Up to 85–95% RH at 40 °C.

• Service Life:

  • Mechanical: ≥1 million operations (no load).

  • Electrical: ≥100,000 operations at rated load.

• Insulation Resistance: >100 MΩ at 500 V DC.

• Dielectric Strength:

  • 2.5 kV AC between input and output.

  • 1.5 kV AC between relay contacts and control.

  • 1.0 kV AC across non-continuous relay contacts.

• Terminals: Screw-type with self-lifting clamps.

• Dimensions: Approx. 45 mm (W) × 75 mm (H) × 116 mm (D).

Applications

• Sequential motor starting to prevent high inrush current.

• Pumps, fans, and compressors requiring delay in start/stop operations.

• Lighting and heating systems requiring delayed switching.

• Control & Relay panels (C&R) and MCC panels.

• Industrial automation and process machinery needing timed ON-delay control.

• Transformer and DG set panels for safe relay sequencing.

Summary

• The B1D-F is a reliable and precise ON-delay timer with adjustable ranges up to 60 minutes.

• Provides accurate and repeatable delay functions with long electrical and mechanical life.

• Compact, rugged, and easy to mount in industrial control panels.

• Ideal for motor control, automation, DG/transformer panels, and general purpose ON-delay applications.