The 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|
|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.
Each of the four relays is controlled by a data logger control port.
|Cable(s) Used||Number of Relays Controlled|
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.
Number of FAQs related to A21REL-12: 1
The following relay devices can be used with the CR800 and the CR850:
The CR800 and the CR850 can also be used with a wide variety of third-party relay devices.
*Because the CR800 and the CR850 only have four digital ports, they do not have the ability to switch all six of the relays on the A6REL-12.