Ampcontrol Pty Ltd
– ABN 28 000 915 542
IPM V2 USER MANUAL
IPM2B003 Revision 15
– MAY/18
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 34 of 83
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6.3 Earth Continuity
Figure 6.4: Earth Continuity Connections
The Earth Continuity function tests for the continuity of the earthing between the outlet and the machine,
via the pilot core in the trailing cable. The pilot core is also used to transfer data when a Remote
Termination Module is used to achieve Machine Data Transfer.
The IPM relay can be configured to operate in either diode or RTM mode. The mode is selected in „EC
Pilot Mode‟ (Level 5, Screen 1) and determines what terminating device the relay is looking for on the
pilot.
NOTE
The Remote Termination Module will only be recognised by an IPM
Relay and will not be seen as a diode by other earth continuity devices.
The relay measures the resistance of the pilot - earth loop and the leakage between the pilot and earth
conductors. The leakage measurement ensures that pilot to earth faults are detected. If the pilot - earth
loop resistance exceeds 45Ω a trip occurs which in turn opens the main contactor control circuit. The
fault can be configured as latching or non-latching. This allows the user to determine if the fault is
manually or automatically reset once the pilot - earth loop resistance is less than 45
Ω. The selection is
either „EC Trip Latch: On‟ or „Off” (Level 6, Screen 17). To manually reset the relay, operate the reset
button.
IPM
Relay
PILOT
15
EARTH
A
B
C
Phase Conductors
EC Test P/B
RTM
PILOT
EARTH
INPUT*
M
Trailing Cable
Supply Enclosure
Motor Enclosure
Emergency Stop
St
ar
t
Note*: Input is ignored if IPM
Remote Start is set to ‘NO’
Emergency
Stop
Pilot
Earth
Not available in Diode Mode
Local Control:
Remote Control:
IPM Diode Mode Pilot Connections
St
o
p
Remote Start
Selector
