Description
The Macromatic ARP120A6R is a compact plug-in duplex alternating relay designed to optimize operational efficiency and balance equipment wear across two electrical loads, such as duplex pumps, air compressors, blowers, or HVAC motors. Operating on a 120 VAC control voltage, this relay automatically toggles between Load 1 and Load 2 each time the control switch opens, ensuring equal runtime and extending overall system longevity.
Equipped with a low-profile digital selector switch on the front panel, the ARP120A6R offers flexible control mode selection, allowing operators to choose between normal automatic alternation or lock the system to operate a single designated load exclusively. Housed in a compact plug-in enclosure for standard 8-pin octal sockets, it features two bright red status LEDs for immediate visual confirmation of active load output. Heavy-duty 10 Amp contacts with pilot duty ratings ensure dependable performance in industrial and commercial control panels.
Key Features
- Duplex Load Balancing: Alternates operation between two independent loads on every control switch cycle to equalize runtime and equipment wear.
- Front Panel Selector Switch: Low-profile switch allows easy setting selection between Normal Alternation or locking continuous operation to Load 1 or Load 2.
- Dual LED Status Indicators: Bright red status LEDs provide clear visual indication of active relay state (LOAD 1 or LOAD 2) at a glance.
- Standard 8-Pin Octal Plug-In: Industry-standard 8-pin socket design allows fast, hassle-free installation and easy module replacement.
- Heavy-Duty Contact Ratings: Rated for 10 A @ 240 VAC / 24 VDC and up to 1/2 HP motor loads with B300/R300 pilot duty ratings.
- High Reliability & Longevity: Engineered for severe industrial duty with a mechanical life of 10,000,000 operations and low power consumption under 3 VA.
Specifications
| Technical Specification | Detail |
|---|---|
| Product Model | ARP120A6R |
| Brand | Macromatic |
| Product Type | Duplex Alternating Relay |
| Control Voltage | 120 VAC (+10/-15% at 50/60 Hz) |
| Output Contact Rating | 10 A @ 240 VAC / 10 A @ 24 VDC, 1/2 HP @ 120/240 VAC (N.O.), 1/3 HP @ 120/240 VAC (N.C.), Pilot Duty B300 / R300 (N.O.) |
| Output Configuration | SPDT / DPDT Output Contact Configuration |
| Mounting / Enclosure Style | Plug-in Enclosure (Mounts to standard 8-pin octal socket) |
| Selector Switch Modes | LOAD 1 (Lock), ALTERNATE (Normal), LOAD 2 (Lock) |
| Status Indication | 2 Red LEDs (LOAD 1 and LOAD 2 active indicators) |
| Power Burden | Less than 3 VA |
| Mechanical Life | 10,000,000 operations |
| Full Load Life | 100,000 operations |
| Operating Temperature Range | -18°F to 149°F (-28°C to 65°C) |
| Storage Temperature Range | -40°F to 185°F (-40°C to 85°C) |
| Primary Applications | Duplex pump control, dual air compressor staging, motor load balancing, HVAC equipment rotation |






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