A21REL-12
A21REL-12

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.
Environment | Communications | Campbell Scientific
Function Allows a data logger to control up to four external ac or dc devices.
Number of Channels 4
Contact Ratings
  • 1 A (at 20 Vdc)
  • 0.3 A (at 120 Vac)
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)