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XW-ED-PRO and XW-EDA-PRO Wiring
The XW-ED and XW-EDA Pro versions support 2 Discrete Open Drain Digital Inputs / Outputs on the 4 Pin M12 Male
connectors. To connect an input or output a standard M12 4pin cable can be used. Omega also offers an optional field
installable M12 connector.
Important:
For the XW-ED-PRO, Digital I/O is only available when the input is set to Process or Digital or if an
Omega Smart Probe is used. Older zSeries probes will automatically disable the Digital I/O.
Pro Discrete Input / Output Connector
Rear view of Filed Connector Shown
Input Settings
To use a pin as an input make sure it is set to Active Low (default) in the Output Tab in SYNC. The Input can then be set as
Active High or Low in the Input Tab.
Each pin has an internal pull-up, but in order to save power, the internal pull-up is only active when the unit takes a
reading. The state of both pins is always shown on the ZW-REC as the last input. Refer to the following table to decode
the input state.
Figure 35
Input 1
Inactive
Inactive
Active
Active
Pin 1
Input / Output 0
Pin 2
Input / Output 1
Pin 3
Ground
Pin 4
Ground
Figure 36
Input 0
Reading
Inactive
Active
Inactive
Active
0
1
2
3
21 |
P a g e
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