Digital Input Interlock

Description

Any digital input of LTMT main unit or LTMT expansion unit can be configured as interlock, helps to prevent start of motor in absence of required digital inputs. Similarly, the respective interlock protection, if enabled, trips the motor in the absence of interlock. Maximum of 12 digital inputs can be used as interlock (1-12) and each interlock is provided with the protection function.

The interlock input can be assigned as a function such as alarm or trip which will be perfomed on the absence of that interlock. The interlock configured as trip causes the LTMT main unit to trip in the event of absence of the corresponding interlock.

The digital input interlock protection function generates the following signals:

• Alarm: When digital input interlock status is in the low state.

• Trip: When digital input interlock status is in the low state for the specified time delay.

Parameter Setting

Each digital input interlock protection function has the following configurable settings: