Vaisala DRYCAP DMT340 SERIES User's Guide Page 122

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USER'S GUIDE____________________________________________________________________
122 _________________________________________________________________ M210704EN-E
Relay Indicating Transmitter Error Status
You can set a relay to follow the operation status of the device. By
selecting FAULT/ONLINE STATUS for output quantity a relay changes
state on the basis of the operation status as follows:
FAULT STATUS
Normal operation: relay active (C and NO outputs are closed)
Not measuring state (error state or power off): relay released (C and NC
outputs are closed)
ONLINE STATUS
Live measurement (data available): relay active (C and NO outputs are
closed)
No live data (for example: error state, chemical purge or adjustment
mode): relay released (C and NC outputs are closed)
See Figure 68 on page 123 for illustrative examples of the
FAULT/ONLINE STATUSrelay output modes.
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