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Overview

The 7321 is a single-channel, solid-state relay that allows a datalogger to control one or two dc devices.

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Benefits and Features

  • Generally more economical for one or two channel applications as opposed to a 4- or 6-channel relay driver

Detailed Description

The 7321 is the same device as CRYDOM's model D1D07 that's distributed through Newark Electronics and others. One data logger digital port controls each relay.

Normally Open

This relay is usually operated in the Normally Open state. In this state, when the digital port is set high, the relay is closed. Wiring for this situation is as follows:

Data Logger Terminal Relay Screw Terminal
ground 4
digital port
(i.e., C1, C2,...)		 3

Normally Closed

The 7321 can also be operated in the Normally Closed state. In this state, when the digital port is low, the relay is closed. Wiring for this situation is as follows:

Data Logger Terminal Relay Screw Terminal
5V 3
digital port
(i.e., C1, C2,...)		 4

Specifications

Function Allows a data logger to control one or two dc devices.
Number of Channels 1
Operating Temperature -40° to +100°C
Operating Voltage 1 to 100 Vdc
Control Voltage 3.5 to 32 Vdc
Control Current 1.6 mA (@ 5 Vdc)
Rated Current/Voltage 7 A (@ 100 Vdc)
Dimensions 5.99 x 2.74 x 5.99 cm (2.36 x 1.08 x 2.36 in.)
Weight 108.86 g (0.24 lb)

Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Dataloggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR500 (retired) The CR500 has only one digital port capable of providing control signal.
CR5000 (retired)
CR510 (retired) The CR510 has only one digital port capable of providing control signal.
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)