Edwards nEXT 55, Instruction Manual

Page: 47 / 116

Connect the electrical supply
WARNING: POWER SUPPLY
Risk of electric shock or damage to equipment. A separate power supply (not
included) is necessary for the product. The power supply has to be protected against
a hazardous live condition (for example, a short circuit).
WARNING: EMERGENCY STOP SWITCH
Risk of injury or damage to equipment. Install an applicable emergency stop switch in
the electrical supply. Make sure that the switch is easy to access and is marked as the
emergency disconnecting device for the pump. Failure to do so can cause you to not
be able to switch off the pump in an emergency.
WARNING: HOT SURFACE
Risk of injury or damage to equipment. Install an applicable fuse or current limiting
device in the 24 - 48 V d.c. supply line to the pump. Failure to do so can cause the
hazardous surface temperature of the pump or risk of a fire hazard. Refer to Table:
Logic interface technical data for applicable fuse ratings.
WARNING: SUPPLY VOLTAGE
Risk of injury or damage to equipment. Make sure that the maximum supply voltage
is not more than necessary voltage. Failure to do so can cause permanent damage to
the control electronics and can cause a mechanical hazard in failure conditions.
WARNING: HOT SURFACE
Risk of injury or damage to equipment. When you connect the pump to the power
supply, make sure that all 3 pins for the 24 - 48 V connection and all 3 pins for the 0 V
connection on the customer connector mating half are connected to the power
supply. Failure to do so can cause the connectors to overheat .
The electrical supply for the pump must meet the requirements of UL61010-1 and
EN61010-1. Make sure that the hazardous voltages given in UL61010-1 and EN61010-1
are not available on the electrical interface to the pump.
The pump 0 V is not referenced to ground. Make sure that there is only one path
between 0 V and ground. Do not make multiple connections between 0 V and ground to
prevent the offset voltages on control and status signals and problems with serial
communications. If there is no connection available between 0 V and ground, make the
connection at the power supply. Other electrical equipment connected to the system
can make a connection between 0 V and ground, for example a personal computer or a
measuring equipment.
4.5 Connect the parallel control and monitoring
To make the connections for the parallel control and monitoring, use an applicable
mating half (not supplied).
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B8G000880_E - Installation