Relays & Barriers

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  • ARA Expandable

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    ARA series expandable alternating relays from the ATC Diversified Electronics Division of Marsh Bellofram are designed for use in multiple load installations that are required to alternate in sequence and have the ability to accept an additional load installation in the future.
    Data Sheet
  • ARA Triplexer Quadraplexer

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    ARA Series Triplexer Quadraplexer Alternating Relays from the ATC Diversified Electronics Division of Marsh Bellofram are designed for use in multiple load installations that are required to alternate in sequence while assuring equal run time on all loads. They also allow for additional loads to run in the event of excess load requirements, with the option of automatic or external clocking alterations. When the factory installed jumper is in place, the alternating action is initiated by a control switch, which is common to one side of the control voltage. When the jumper is removed, alternating action is initiated by an isolated normally open switch.
    Data Sheet
  • ARA-120-AHE Special Function Triplexer

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    The ARA-120-AHE special function triplexer alternating relay from the ATC Diversified Electronics Division of Marsh Bellofram are designed for use in three-load installations. This model has a field selection switch that is used to omit one of the three loads for general or emergency maintenance while depleting the remaining two loads.
    Data Sheet
  • ARA-120-AJE

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    The ARA-120-AJE Alternating Relay with Sequence Locking Switch is a special function triplexer alternating relays are designed three-load installations.  This unit has a field selection switch that is used to lock the alternating relay into a desired sequence. The model ARA-120-AJE Alternating Relay with Sequence Locking Switch has the option of automatically alternating on each load cycle or by external clocking, while allowing for additional loads to run in the event of excess load requirements.
    Data Sheet
  • ARA, ARB Duplexer

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    ARA, ARB Series Duplexer Alternating Relays from the ATC Diversified Electronics Division of Marsh Bellofram are used in control panel applications where two loads are required to alternate in order to provide equal run time. The alternating action is initiated by a control switch, which is common to one side of the control voltage. The output contacts will change states each time the control switch is opened, thus alternating the two loads. The LED indicators show the position of the output relay. The ARA series is the standard duplexer, providing automatic alternating sequence. The ARB series has the automatic sequencing feature plus the option of locking into a single sequence. A three position switch permits the field selection of normal duplexing action, locking in the A-B sequence, or B-A sequence, as required.
    Data Sheet
  • Gems 54800 Dual Channel Zener Barrier

    Manufacturer Series
    Gems 54800 Dual Channel

    Gems® type 54800 dual channel zener barriers provide intrinsic safety with solid-state reliability. Since no explosion proof enclosures are needed for sensor wiring, these units further provide economical installation. With encapsulated construction, they are impervious to dust and moisture. They are used with instrumentation that produces an output (signal conditioners) and requires two barriers, one for each floating lead. Any non-voltage producing sensor or switch is rendered intrinsically safe for hazardous locations when properly connected to the output of these zener barriers.

    Data Sheet
  • Gems 65800 Single Channel Zener Barrier

    Manufacturer Series
    Gems 65800 Single Channel

    Gems® type 65800 single channel zener barriers provide intrinsic safety with solid-state reliability. Their exceptionally compact design saves space and simplifies installation, especially in multiples on a common mounting plate. With encapsulated construction, they are impervious to dust and moisture. They provide great economy as well since no explosion proof enclosures are needed for sensor wiring. Single screw mounting is standard, but units can be supplied with an optional clip for rail mounting. Any non-voltage producing sensor or switch is rendered intrinsically safe for hazardous locations when properly connected to the output of these zener barriers.

    Data Sheet
  • Gems Non-Intrinsically Safe SAFE-PAK Relay

    Manufacturer Series
    Gems Non-Intrinsically Safe SAFE-PAK

    Gems® non-intrinsically safe relays perform the functions of electro-mechanical relays, with the added reliability and advantages inherent in solid-state. Compact, totally encapsulated, and impervious to shock or vibration, these units mount anywhere, even directly on working machinery. LOAD-PAKS are integrated, solid-state switches that amplify current handling capabilities of sensors for controlling high power loads. SPDT-PAKS enable one low current sensor to control two independent loads up to 5 amps each. FLIP-PAKS provide low current, start-stop or on-off switching for industrial motor, liquid level, and other control systems.

    Data Sheet
  • Gems Programmable SAFE-PAK Relay

    Manufacturer Series
    Gems Programmable SAFE-PAK

    Gems® programmable SAFE-PAK relays are designed for use with switches or sensors monitoring flow, pressure, level, etc. They render non-voltage producing sensors intrinsically safe for operation in potentially hazardous areas and feature streamlined housing suited for group-mounting on a common earth-grounded plate for multiple installation. Operations such as normally open, normally closed, or latching are programmed into these versatile units by the user during installation.

  • Gems SAFE-PAK Relay

    Manufacturer Series
    Gems Gems SAFE-PAK

    Gems® SAFE-PAK relays make costly explosion proof enclosures with their special mounting requirements unnecessary. No purging is required. Sensor closures up to 1000 ohms resistance control resistive loads to 5A at 120 VAC.

    Data Sheet