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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | ATC Diversified |
| Manufacturer Product Number | ARM-120-ACE |
| Description | Alternating Relay; Sequence On, Simultaneous Off; 3 x SPST-NO (one per load) |
| Datasheet | Download Datasheet |
The ATC Diversified ARM-120-ACE is a triplex alternating controller for a 120 V AC supply. Its float or pressure switches bring three loads on one after the other, and it drops them all together when the off switch opens; the lead load alternates every cycle, so the run time evens out.
Inputs: four intrinsically safe switch inputs: off, lead, lag and 2nd lag. Selector switch: eight-position: normal, lock 1-2-3 / 2-3-1 / 3-1-2, omit load 1, 2 or 3, test. Inrush delay: 5 s between load starts. Supply tolerance: ±10% of nominal; 50/60 Hz. Power: 2.5 VA.
Output: 3 x SPST-NO (one per load), 5 A resistive at 24 or 120 V AC per channel; 278 VA inductive. Mounting: surface mount, #8-32 screw terminals. Indicator: An LED per output, on when the output is on. Approvals: UL Listed (E151578); intrinsically safe inputs per UL913 (7M26). It operates from -20 to +55 °C and stores from -40 to +85 °C.
| Category | |
| Manufacturer | ATC Diversified |
| Model | ARM |
| Alternating Function | Sequence On, Simultaneous Off |
| Number of Loads | 3 |
| Control Inputs | Four intrinsically safe switch inputs: off, lead, lag and 2nd lag |
| Selector Switch | Yes -- eight-position: normal, lock 1-2-3 / 2-3-1 / 3-1-2, omit load 1, 2 or 3, test |
| Input Voltage | 120V AC |
| Input Operating Range | ±10% of nominal; 50/60 Hz |
| Contact Configuration | 3 x SPST-NO (one per load) |
| Output Rating | 5 A resistive at 24 or 120 V AC per channel; 278 VA inductive |
| Number of Poles | 3 |
| Status Indicator | An LED per output, on when the output is on |
| Mounting Type | Surface Mount |
| Termination Style | Screw Terminal (#8-32) |
| Start Delay Between Loads | 5 s inrush delay |
| Rated Power | 2.5 VA |
| Operating Temperature | -20...+55 °C (-40...+85 °C) |
| Mechanical Life (Electrical) | 20,000,000 (50,000) |
| Approvals | UL Listed (E151578); intrinsically safe inputs per UL913 (7M26) |