Basler Electric BE1-11m - Manual (Page 121)

9424200996 Rev L 109
Analog Input Protection
Eight analog input elements monitor external analog input signals when two remote RTD modules are
connected via Ethernet or RS-485. Four analog inputs are provided with each RTD module. Refer to the
RTD Module chapter for information on mounting, connections, communication setup, and specifications.
The eight, identical remote analog input protection elements are designated ANALOG-1, ANALOG-2,
ANALOG-3, ANALOG-4, ANALOG-5, ANALOG-6, ANALOG-7, and ANALOG-8. Element logic
connections are made on the BESTlogic
™Plus screen in BESTCOMSPlus® and element operational
settings are configured on the Remote Analog Input settings screen in BESTCOMSPlus. A summary of
the logic inputs and outputs and operational settings appears at the end of this chapter.
BESTCOMSPlus Navigation Path: Settings Explorer, Protection, Remote Analog Inputs
HMI Navigation Path: Settings Explorer, Protection, Analog Protection
Element Operation
Modes of Protection
Two modes of protection are available: Over and Under.
In Over mode, if the analog input value is above the Over Pickup setting, the element will pick up. In
Under mode, if the analog input value is below the Under Pickup setting, the element will pick up.
Source
The Source setting selects which analog input to monitor. Refer to the RTD Module chapter for more
information.
Pickup and Trip
The Pickup output occurs first, followed by the Trip output.
Pickup
The Pickup output becomes true when the measured remote analog input value increases above (Over
mode) or decreases below (Under mode) the pickup setting. In BESTlogicPlus, the Pickup output can be
connected to other logic elements to annunciate the condition, control other elements in logic, and start
the fault recorder (logic element FAULTTRIG).
Assertion of the Pickup output initiates a timer that begins timing to a trip. The duration of the timer is
established by the Time Delay setting. A Time Delay setting of zero (0) makes the element instantaneous
with no intentional time delay.
If the pickup condition subsides before the element delay expires, the timer and Pickup output are reset
and no corrective action is taken.
Trip
The Trip output becomes true if a pickup condition persists for the duration of the element Time Delay
setting. In BESTlogicPlus, the Trip output can be connected to other logic elements and to a physical
relay output to annunciate the condition and to initiate corrective action. If a target is enabled for the
element, the BE1-11m will record a target when the Trip output becomes true. See the
Fault Reporting
chapter for more information about target reporting.
Inhibit Level
Remote analog input protection is inhibited when the monitored analog input value decreases below the
Inhibit Level setting. This setting is available only in the Under protection mode.
BE1-11m Analog Input Protection