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Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers

Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers
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Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers - 1

800.727.5646 atcdiversified.com Diversified Electronics ARM Series 257 Al te r n a t in g C o n t r o l l e r s These Triplex and Quadraplex Controllers are available with either Sequence-On-Simultaneous-Off (SOSO) or First-On-First-Off (FOFO) output logic. The special function models are differentiated by a rotary switch that allows any output to be locked as the lead load or any one load to be omitted while sequencing only the remaining loads. In addition to load omission and lead selection, the expandable model can be set for 2, 3, or 4 load operation with either SOSO or FOFO logic. All models feature intrinsically safe inputs and logic that allows the outputs to operate properly even if one of the inputs fails to open or close. For example: if the off switch fails to close, the lead load will not energize until both the lead and the lag switches close. An inrush delay on all models reduces line sags by preventing multiple loads from energizing simultaneously. Alternating Relays & Controllers // ARM Series 7M26 UL913 • 3 and 4 Load Output Models • 2-4 Load Expandable Model • Intrinsically Safe Inputs \\\SPECIFICATIONS CONTROL VOLTAGE 24 or 120 VAC ±10%, 50/60 Hz SWITCH VOLTAGE 5.1 Volts open circuit SWITCH CURRENT 10 ìAmps short circuit POWER REQUIRED 2.5 VA SENSITIVITY 100 k ohm ISOLATION 2500V Input to Output DUTY CYCLE Continuous RESPONSE TIMES Power Up < 1 SEC Operate < 25 mSEC (switch closure) Inrush 5 SEC Release < 150 mSEC CONTACT RATING All channels, SPST-N.O., 5 Amps per channel @ 24 or 120 VAC, Resistive; 278 VA, Inductive LED INDICATORS ON when corresponding output is ON LIFE EXPECTANCY Mechanical 20 Million Operations Electrical 50,000 Operations TEMPERATURE RATING Operate -4° to 131°F (-20° to +55°C) Storage -40° to 185°F (-40° to +85°C) TERMINATIONS (12) #8-32 Screw terminals with pressure clamps ENCLOSURE Style “E” Surface mount WEIGHT 16 oz. \\\DIMENSIONS (INCHES) MODEL NUMBER >>>>>> ARM E Control Voltage 24 A E 24 VAC 120 VAC 120 Number of Loads Output Logic Special Functions 3 SOSO none 3 FOFO none B 3 SOSO Omit/Lead Select C 3 FOFO Omit/Lead Select D 4 SOSO none G 4 FOFO none H Enclosure Mount No Suffix Surface Mount P Suffix Panel Mount P

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Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers - 2

ARM Series Diversified Electronics atcdiversified.com 800.727.5646 258 Alternating Relays & Controllers // ARM Series \\\OPERATION—TRIPLEX CONTROLLERS Intrinsically safe equipment and wiring is equipment and wiring which is incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most ignitable concentration. Intrinsically safe terminations and wiring may be brought into any hazardous location of any group classification for which it is accepted without requiring explosion-proof...

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Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers - 3

800.727.5646 atcdiversified.com Diversified Electronics ARM Series Alternating Relays & Controllers // ARM Series 259 \\\OPERATION—QUADRAPLEX CONTROLLERS The ARM-120-AGE and ARM-120-AHE Quadraplex Controllers have five switch inputs and four load outputs. The inputs are designated off, lead, lag, 2nd lag, and 3rd lag. With the off switch closed, the loads energize in sequence upon closure of the lead, lag, 2nd lag, and 3rd lag inputs. If the off switch fails to close, the lead load will not energize until both the lead and lag switches close. De-energization of the loads depends on the...

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Marsh Bellofram Diversified Electronics Division ARM Series Alternating Controllers - 4

ARM Series Diversified Electronics atcdiversified.com 800.727.5646 260 Alternating Relays & Controllers // ARM Series SOSO OPERATION FOFO OPERATION This example illustrates the normal operation of the Triplex Controller in a pump down application with four normallyopen- dry float switches. The switches are designated off, lead, lag, and 2nd lag. The example begins with all switches open and all loads de-energized. As the fluid level rises, the OFF switch closes, no loads are energized. If the fluid level continues to rise, the lead switch closes and load 1 energizes. As the fluid level...

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