The 7321 is a single-channel, solid-state relay that allows your data logger to control one or two dc devices.
Read MoreThe 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.
This relay is usually operated in theNormally Openstate. 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 |
The 7321 can also be operated in theNormally Closedstate. 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 |
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) |
Note:The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
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 | ||
CR850 | ||
CR9000(retired) | ||
CR9000X(retired) |
Number of FAQs related to7321:2
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.
Either thePortSet()or theWriteIO()instruction can be used to open and close the 7321 relay. These instructions are commonly used in conjunction with anIfThen/EndIfconstruction.
In this first example, the program closes the relay at the top of a 60 second interval and then opens the relay after ten seconds:
BeginProg
Scan (1,Sec,0,0)
If IfTime (0,60,Sec) Then
PortSet(1,1)
ElseIf IfTime (10,60,Sec) Then
PortSet(1,0)
EndIf
NextScan
EndProg
In this second example, theWriteIO()instruction is used to close the 7321 relay based on the measured panel temperature:
Public PTemp
BeginProg
Scan (1,Sec,0,0)
PanelTemp (PTemp,_60Hz)
If PTemp > 25 Then
WriteIO (&B00000001,&B00000001)
Else
WriteIO (&B00000001,&B00000000)
EndIf
NextScan
EndProg
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