P&B MPC2000D Manual page 15

Isolator (75,76)
This input enables the MPC2000D to determine if the motor starter is in the isolated or service (available) position.
With the input open the motor starter is isolated and cannot be started. A closed contact indicate the motor is in the
service position and can be started. Contact opening while the motor is running will result in the immediate stopping
of the motor.
External Fault 2 (18,17)
This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault is
healthy and when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset when
enabled, occurs when the input contact closes.
External Fault 3 (20,19)
This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault is
healthy when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset when
enabled, occurs when the input contact closes.
External Test Position (20-,19)
This feature can be provided as an alternative to the External Fault 3 input by means of a change in internal dip
switch settings prior to leaving the factory. The default setting is for this input is 'External Fault 3'.
If this option is selected a facility is provided to carry out function and protection testing on the motor starter
provided the starter is isolated. When this option is selected the Logical Input/Contact Status page will display in
place of the External Fault 3 the External Test status and will indicate 'Open = Run Enable' or 'Closed = Test'
messages.
The Closed = Test status will only be achieved providing the Isolator contacts confirm that the starter is in the
isolated position.
When in the Test mode the MPC2000D will ignore the Plant Interlock input and will disable Undercurrent Alarm &
Trip, Undervoltage, Single Phase and Phase Sequence protection functions to allow full functional testing to be
performed without the need for voltage or current injection and will allow secondary injection testing to be carried
out on all protective functions except for those disabled by the feature. If the External Test feature is required this
should be specified on the purchase order.
Emergency Stop (31,32)
This input allows the MPC2000D to monitor the status and provide indication of the state of any of the external
Emergency Stop buttons which are normally directly wired to the contactor closing circuit. Opening of the input
causes a trip or alarm depending on the Tripping/Alarms Settings.
Page 12 Issue 2 22/4/98 MPC2000D