A21REL-12 4-Channel Relay Driver
With an A21REL-12, your Campbell Scientific data logger can control up to four external ac or dc devices. This relay driver has four internal relays.
The A21REL-12's internal relays are single-pole double-throw. This relay driver may be powered by the data logger power supply or a separate 12 Vdc battery.
| Function | Allows a data logger to control up to four external ac or dc devices. |
| Number of Channels | 4 |
| Contact Ratings |
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| Coil Current | 13 mA/relay |
| Relays | dual single-pole, double-throw relays |
| Operating Temperature | -25° to +50°C |
| Operating Voltage | 12 Vdc |
| Dimensions | 14.0 x 6.9 x 3.0 cm (5.5 x 2.7 x 1.2 in.) |
| Weight | 227 g (8 oz) |
