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▪
Connection of MODBUS communication: Connect the controller to the drive
MODBUS-RTU interface by using multiple core cable.
▪
Connection of 'General Shutdown' signal: ma and mc are the normally open
contact (relay output) of the drive, for the capacity of the contact, refer to
Electrical
to 1X7:1 and 1X7:2.
▪
Connection of 'Stator Warm Up Ready' signal: p1 and c1 are the normally open
contact (photocoupler output) of the drive, for the capacity of the contact, refer to
Table: Electrical
controller to 1X7:3 and 1X7:4.
▪
Connection of 'Stator Temperature High Warning' signal: p2 and c2 are the
normally open contact (photocoupler output) of the drive, for the capacity of the
contact, refer to
connect the controller to 1X7:5 and 1X7:6.
5.5 Connect the dry pumping system to the vacuum/exhaust system
WARNING:
Pipe the exhaust to a suitable treatment plant to prevent the discharge of dangerous
gases or vapours to the surrounding atmosphere.
WARNING:
Do not operate the dry pumping system with the exhaust pipeline blocked. If the
exhaust pipeline is blocked, the dry pumping system can generate exhaust pipeline
pressures of up to 10 bar (10 x 10
15 bar (15 x 10
0.5 seconds if the inlet is instantaneously exposed to atmospheric pressure when the
pump is running and the exhaust is blocked.
WARNING:
Do not touch the pump exhaust and check‐valve (if fitted) while the pump is running
since the temperatures of these parts cause burns. These parts will remain hot after
the pump has stopped.
CAUTION:
The dry pumping systems have a maximum continuous exhaust line pressure limit.
Operation above the limit may damage the pumping mechanism.
The light duty dry pumping systems do not have an exhaust pressure sensor. The
maximum continuous exhaust line pressure of these dry pumping systems should not
exceed 0.2 barg.
For all pumps, it is your responsibility to provide an exhaust system with sufficient
conductance to ensure the exhaust pressure limit is not normally exceeded.
A41870880_A
A41870880_A - Installation
connections. Use a single core cable (AWG18) to connect the controller
connections. Use a single core cable (AWG18) to connect the
Table: Electrical
5
Pa). Note that a pressure spike up to a maximum
5
Pa) can be generated in the exhaust pipeline for less than
Page 35
connections. Use a single core cable (AWG18) to
Table:
07/2021 - ©Edwards Limited
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