Services Available | |
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Repair | No |
Free Support | Yes |
The A21REL-12 contains four internal relays that allow a Campbell Scientific datalogger to control up to four external ac or dc devices.
Read MoreThe A21REL-12's internal relays are single-pole double-throw. This relay driver may be powered by the datalogger 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 |
|
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) |
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Product | Compatible | Note |
---|---|---|
21X (retired) | ||
CR10 (retired) | ||
CR1000 (retired) | ||
CR10X (retired) | ||
CR200X (retired) | ||
CR206X (retired) | ||
CR211X (retired) | ||
CR216X (retired) | ||
CR23X (retired) | ||
CR295X (retired) | ||
CR300 | ||
CR3000 (retired) | ||
CR310 | ||
CR350 | ||
CR500 (retired) | The CR500 has only one control port capable of providing a control signal. | |
CR5000 (retired) | ||
CR510 (retired) | The CR510 has only one control port capable of providing a control signal. | |
CR800 (retired) | ||
CR850 (retired) | ||
CR9000 (retired) | ||
CR9000X (retired) |
Product | Compatible | Note |
---|---|---|
ENC10/12 | ||
ENC10/12R | ||
ENC12/14 | ||
ENC14/16 | ||
ENC16/18 | ||
ENC24/30 | ||
ENC24/30S |
Each of the four relays is controlled by a data logger control port.
Cable(s) Used | Number of Relays Controlled |
One CABLE3CBL-L | 1 |
One CABLE4CBL-L | 2 |
One CABLE5CBL-L | 3 |
Two CABLE3CBL-L | 4 |
The A21REL-12 may be powered by the data logger power supply or a separate 12 Vdc battery.
The A21REL-12 requires a non-condensing environment. No mounting bracket is available. The peripheral is typically mounted in the data logger enclosure with double-sided tape or Velcro.