Ampcontrol MPA3 V6.3, User Manual

Page: 10 / 46

MPA3 V6.3 MOTOR PROTECTION RELAY MANUAL
Issue: R0, Date: 11/2010, CRN: 8168
MPAB010 Rev0
MPA3 V6.2 Motor Protection Relay Manual
Page 9
3.3 Optional Monitoring Modules
3.3.1 MPA-M
This optional monitoring module (MPA-M) can be utilised to provide the following features:

Five PT-100 RTD inputs, which are arranged in two groups; three for the stator and two for the bearings.

RS485 Modbus RTU communication port that can be connected to Motor Starter PLC's, or a central
monitoring system, for continuous monitoring and fault-finding.
 A 0-20 mA/4-20 mA Analogue Output.
3.3.2 MPA-I
This is an optional insulation test module which allows frequent testing of motor insulation.
3.3.3 MPA-M (e)
This optional monitoring module has the same features as the MPA-M module except the RS485 Modbus
communication port is replaced by an EtherNet/IP communications port.
4
Basic Display Operation
The facia of the MPA Motor Protection Relay has a two line 16-character backlit LCD display, Status LED and a
tactile keypad.
The layout of the display structure is shown on the ‘
MPA Display Map ’. The display level is changed with the
Up/Down arrow keys and the Left/Right arrow keys control the display Position. See drawing ‘ MPA Display Map’
MPAB003 , Appendix A – Drawings.
The ENT and ESC keys are used to modify settings and provide hyper jump access to the display structure.
The Reset key allows reset following a trip condition.
The Status LED is a single bi-coloured LED that can be viewed some distance from the relay. Status indication is as
follows:
MPA Status LED Colour LED Flash
OK Green 4 Hz
Alarm Red 4 Hz
Trip Red 1 Hz
The ‘Motor Status Page’ is the default screen on power up and shows the current status of the MPA Protection
Relay. A one-line status message is displayed and if more than one message is active the display cycles through all
active messages at 1 second intervals.