B800-00-880 Issue D
Page 34
© Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.5.2
Earth (ground) connections
Edwards recommends fitting a separate earth (ground) conductor to earth the nEXT pump. Use an un-insulated braid
or a separate insulated green/yellow conductor with a minimum 10 AWG (5.3 mm
2
) conductor to comply with US and
Canadian installation codes, and use the M5 x 10 screw and shake proof washer supplied (fitted to the earth hole on
the pump) to secure the earth conductor to the pump. The impedance between the pump body and the earth
connection point must be < 0.1 Ohm.
3.5.3
Connect the logic interface to the TIC
If an Edwards TIC Turbo Instrument Controller or a TIC Turbo Controller is used to power and control the pump, the
nEXT pump logic interface cable connects directly into the back of the TIC. Refer to the TIC Instruction Manual for
further information.
The RS485/RS232 slide switch must be in the RS232 position if the TIC is to be used to control the nEXT pump. Refer
to
Section 3.7.1
. If the switch is in the RS485 position, the TIC will connect to the pump in parallel mode, indicating
the pump type as nEXTp. The serial connection will be disabled but start and stop will be possible.
3.5.4
Connect the logic interface to the customer control equipment
If operating the nEXT pump using the customer control system, use a suitable connector mating half (not supplied),
to connect the control equipment to the connector on the logic interface cable (refer to
Table 10
). When making the
electrical connections to the nEXT pump described in the following sections, refer to
Table 11
for full details of the
logic interface connector pins.
The nEXT pump can be controlled using a hardware parallel control interface and/or via commands sent over a serial
interface.
If the nEXT pump is controlled using the hardware parallel interface, refer to
Section 3.6
for more information. If
the serial interface is used, see the instructions given in
Section 3.7
. The logic interface provides the facility to work
with a mixture of parallel and serial control, refer to
Section 3.8
.
3.5.5
Connect the electrical supply
WARNING
This product requires a separate power supply (not included). The power supply should be
adequately protected against a hazardous live condition (for example, in case of a short circuit).
WARNING
Incorporate a suitable isolation device in the electrical supply. Locate the switch in an easily
accessible position and mark it as the disconnecting device for the nEXT pump. If an isolation
device is not provided, it will not be possible to switch the nEXT pump off in an emergency.
WARNING
Incorporate a suitable fuse as specified in
Section 2.8
, in the 24 - 48 V supply line to the nEXT
pump. To fully protect the pump in case of a fault, a suitable rated fuse should be used - refer to
Table 10
. The power supply should have a current rating capable of blowing the fuse. If a fuse is
not provided and a fault develops, the nEXT pump may develop a hazardous surface temperature
or present a fire hazard.
