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Marsh Bellofram Diversified Electronics Division Time Delay Relays - Standard Ranges Overview Sheet

Marsh Bellofram Diversified Electronics Division Time Delay Relays - Standard Ranges Overview Sheet
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Marsh Bellofram Diversified Electronics Division Time Delay Relays - Standard Ranges Overview Sheet - 1

Standard Ranges Diversified Electronics atcdiversified.com 800.727.5646 84Time Delay Relays // Standard Ranges \\\ STANDARD DELAY RANGES AVAILABLE \\\ “FIXED” DELAY OPTION The chart below shows the standard adjustable time delay ranges available. The part number suffix equals the maximum adjustable delay period of the timer. No letters following the suffix number indicates the delay period in seconds; and M indicates minutes; and an H indicates hours. Most ATC Diversified timers are available with the delay period factory preset (“fixed”) for some specified duration. When this option is ordered, the part number should have an “F” in the Type of Operation designation: and the last digits should specify the desired time delay in seconds (S), minutes (M), or hours (H). Example: TDC 120-AFA-30M—delay-on-operate, 120 Volts AC or DC, 8-pin octal plug-in package with a 30 minute fixed delay. On models specified as having the external resistor adjustability feature, the delay period is set by placing resistance across designated pins or terminals. One meg ohm resistance provides the maximum delay on all models. The minimum delay is obtained by jumping the terminals together. The resistor or potentiometer chosen should be a 1/4 watt or larger. To determine the resistor value required for a specific time delay, use the following formula: Rext = (Tdes/Tmax) X 1000 Rext = Resistance value required to obtain T des (in K ohms) Tdes = Desired time delay Tmax = Maximum delay period of the timer Example: Model TDC-120-ARC-300; find the external resistance value required for a 240 second delay: Rext = 240 300 X 1000 = 800 K ohms NOTE: Not all time delays are available with each option shown above. The specific options for each timer type are described on their respective pages. \\\ STANDARD DELAY RANGE CHART PART NUMBER SUFFIX MINIMUM SETTING MAXIMUM SETTING 030 0.3 seconds 30 seconds 060 0.6 seconds 60 seconds 100 1 second 100 seconds 200 2 seconds 200 seconds 300 3 seconds 300 seconds 600 6 seconds 600 seconds 900 9 seconds 900 seconds 30M 18 seconds 30 minutes 60M 36 seconds 60 minutes 90M 54 seconds 90 minutes 2H 1.2 Minutes 2 hours 4H 2.4 Minutes 4 hours 8H 4.8 Minutes 8 hours 12H 7.2 Minutes 12 hours 16H 9.6 Minutes 16 hours 20H 12 Minutes 20 hours 24H 14.4 Minutes 24 hours Longer delays available upon request. Consult Factory \\\ EXTERNAL RESISTANCE SELECTION Included in ATC Diversified’s broad line of timers are six (6) models that feature independent OFF/ON delay adjustments. They are TDF, TDH, TDI, TSF, and TSH. Notice in the ordering information section on each of their respective pages the timing range is specified by a three (3) digit suffix. This indicates that both the OFF and ON delay periods have the same timing ranges. Example: TDF-120-ALA-300: Both OFF and ON delay periods are independently adjustable from 3 to 300 seconds. In the event that two (2) separate delay ranges would be required, the part number is modified to add a slash(/) followed by three (3) more digits. Since the OFF delay (TI) is first in all models, it is specified first in the part number. Example: TDF-120-ALA-12H/30M: the OFF delay is adjustable from 7.2 minutes to 12 hours and the ON delay is adjustable from 18 seconds to 30 minutes. NOTE: Combinations of various “types of operation” are available: fixed/adjustable, knob/lock nut, etc. Consult factory. \\\ OFF/ON DELAY TIMERS MODEL NUMBER >>>>>> T X X Time Delay D, U 24 A K A Series Relay Output Solid-State Output S Mode of Operation Supply Voltage 24 Volts 120 Volts 120 240 Volts 240 Type of Voltage AC DC D Type of Operation Knob Adjustment Lock Nut Adjustment L Fixed (Factory Preset) F External Resistor Adjustable R Enclosure Style 8 or 11-Pin octal plug-in Blade plug-in B Potted Cube C Delay Period See Standard Delay Range Chart \\\ GENERAL ORDER INFORMATION

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