Relay Drivers / A6REL-12
A6REL-12 6-Channel Relay Driver with Manual Override

Overview

You can control up to 12 external ac or dc devices using the six internal relays of the A6REL-12. Each relay set can be controlled manually or by a datalogger.

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Benefits and Features

  • UL/CUL approved product

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Detailed Description

The A6REL-12's internal relays are dual single-pole double-throw. Each of the six relays has a three position toggle switch; "on" and "off" for manual override, and "auto" for datalogger control. In the on position, the common and normally open contacts are shorted. In the auto position, the state of a relay is controlled by a datalogger control port.

A6REL-12's with serial numbers 1445 and higher are UL-approved.

Specifications

Operating Voltage 12 Vdc nominal (8.4 to 24 Vdc)
Current Drain at 12 Vdc
  • 6 µA quiescent
  • 30 mA per active LED (switch ON or AUTO active)
Toggle Switch ON/OFF manual override; AUTO for datalogger control
Relays dual single pole double throw, break before make
Contact Material Gold-clad silver
Coil Resistance 720 Ω ±10%
Contact Ratings
  • 2 A (@ 30 Vdc)
  • 0.6 A (@ 125 Vac)
Release/Actuation Time ~3 ms
Operating Temperature -40° to +70°C
Standards
  • Underwriters Laboratories (UL) listed product (E162021)
  • Canadian Underwriters Laboratories (CUL) listed product (5Z21)
Dimensions 22.4 x 13.9 x 4.1 cm (8.8 x 5.5 x 1.6 in.) including switches and mounts
Weight 635 g (1.4 lb)

Expected Life (contact closures)

Mechanical 108
Electrical
  • 5x105 (2 A at 30 Vdc)
  • 2x106 (1 A at 30 Vdc )

Compatibility

Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Dataloggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000
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 The CR800 has only four control ports capable of providing a control signal.
CR850 The CR850 has only four control ports capable of providing a control signal.
CR9000 (retired)
CR9000X

Mounting Equipment

Product Compatible Note
ENC10/12
ENC10/12R
ENC12/14
ENC14/16
ENC16/18
ENC24/30
ENC24/30S

Additional Compatibility Information

Datalogger Considerations

Each of the six relays is controlled by a datalogger control port.

Cables

Cable(s) Used Number of Relays Controlled
One CABLE3CBL-L 1
One CABLE4CBL-L 2
One CABLE5CBL-L 3
Two CABLE3CBL-L 4
One CABLE3CBL-L and
one CABLE4CBL-L
5
Two CABLE4CBL-L 6

Power Considerations

The A6REL-12 consumes 30 mA per active LED. The A6REL-12 may be powered by the datalogger power supply (see manual for considerations with 21X) or a separate 8.4 to 24 Vdc battery. The A6REL-12 must be powered by a Class 2 device (Campbell Scientific power supplies conform to this requirement).

Enclosure Considerations

The A6REL-12 requires a non-condensing environment; a Campbell Scientific enclosure is recommended. A6REL-12's with serial numbers 1445 and higher include mounting flanges with keyhole slots that attach to the backplate of an enclosure. Grommets and screws are provided.

A6REL-12s with serial numbers 1444 and lower require the 6281 bracket kit for attachment to the backplate of Campbell enclosures.

Documents


Frequently Asked Questions

Number of FAQs related to A6REL-12: 1

  1. The following relay devices can be used with the CR800 and the CR850:

    • 7321
    • A6REL-12*
    • A21REL-12
    • LR4
    • SDM-CD8S
    • SDM-CD16AC
    • SDM-CD16S

    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.

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