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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | TimeMark |
| Manufacturer Product Number | B471 |
| Description | Alternating Relay; First On, First Off; 4 x SPST-NO (one per load) |
| Datasheet | Download Datasheet |
The TimeMark B471 is a multi-stage alternator for a 120 V AC supply. Its float or pressure switches bring up to four pumps on one after the other and drop them in the order they came on (first on, first off); DIP switches set how many pumps it runs, and the lead pump alternates every cycle.
Inputs: four dry contacts (1-4), 1 mA at 12 V DC (do not apply voltage). Pump down or pump up; DIP switch sets the number of pumps. Power: 0.5 W max.
Output: 4 x SPST-NO (one per load), 2 A at 240 V AC resistive. Mounting: panel mount, screw terminals. Indicator: 4 MOTORS RUNNING LEDs. It operates from -29 to +60 °C.
| Category | |
| Manufacturer | TimeMark |
| Model | 471 |
| Alternating Function | First On, First Off |
| Function Selection | Pump down or pump up; DIP switch sets the number of pumps |
| Number of Loads | 1 to 4 (selectable) |
| Control Inputs | Four dry contacts (1-4), 1 mA at 12 V DC (do not apply voltage) |
| Input Voltage | 120V AC |
| Contact Configuration | 4 x SPST-NO (one per load) |
| Output Rating | 2 A at 240 V AC resistive |
| Number of Poles | 4 |
| Status Indicator | 4 MOTORS RUNNING LEDs |
| Mounting Type | Panel Mount |
| Termination Style | Screw Terminal |
| Dimensions | 5.5" x 3.88" (3.0" hole spacing), 6.06" overall, 2.08" / 2.70" high |
| Rated Power | 0.5 W max |
| Operating Temperature (°C) | -29...+60 |