Siemens SITRANS LUT400, Operating Instructions Manual

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Page 172 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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2.9.2. Discrete Input Logic
Use the following parameters to configure the discrete input itself.
Normal state is standard operation, with the SITRANS LUT400 sensing the
material level and controlling the pumps, and no faults or alarms present. The
discrete input contacts are either NORMALLY OPEN or NORMALLY CLOSED
when the system state is normal.
For example:
When discrete input logic is set to Normally Open and discrete input has no
voltage applied on the terminal block, the discrete input will be inactive (OFF).
2.9.2.1. Discrete Input 1 Logic
Use to change the behaviour of the Discrete Input 1.
2.9.2.2. Discrete Input 1 Scaled State
Read only. Indicates the current state of Discrete Input 1.
2.9.2.3. Discrete Input 2 Logic
Use to change the behaviour of Discrete Input 2.
2.9.2.4. Discrete Input 2 Scaled State
Read only. Indicates the current state of Discrete Input 2.
Discrete Input Logic Terminal Block Discrete Input Scaled State
Normally Open
Voltage applied ON
No voltage applied OFF
Normally Closed
Voltage applied OFF
No voltage applied ON
Options
*
NORMALLY OPEN
NORMALLY CLOSED
Options
ON
*
OFF
Options
*
NORMALLY OPEN
NORMALLY CLOSED
Options
ON
*
OFF