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Overview
The 7321 is a single-channel, solid-state relay that allows your data logger to control one or two dc devices.
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
Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
Data Loggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | X | |
| CR10 (retired) | V | |
| CR1000 (retired) | V | |
| CR10X (retired) | V | |
| CR200X (retired) | V | |
| CR206X (retired) | V | |
| CR211X (retired) | V | |
| CR216X (retired) | V | |
| CR23X (retired) | V | |
| CR295X (retired) | V | |
| CR300 | V | |
| CR3000 (retired) | V | |
| CR310 | V | |
| CR350 | V | |
| CR500 (retired) | V | |
| CR5000 (retired) | V | |
| CR510 (retired) | V | |
| CR6 | V | |
| CR800 | V | |
| CR850 | V | |
| CR9000 (retired) | X | |
| CR9000X (retired) | X |
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