B722-40-880 Issue H
Page 22
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Installation
3.5.2
Earth (ground) connections
Edwards recommends fitting a separate earth (ground) conductor to earth the DX pump. Use an uninsulated braid or
a separate insulated green/yellow conductor, and 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
Ω
.
3.5.3
Connect the logic interface to the TIC
If an Edwards TIC Turbo Instrument Controller or TIC Turbo Controller is used to power and control the pump, the DX
pump logic interface cable connects directly into the back of the TIC. Refer to the TIC Instruction Manual for further
information.
3.5.4
Connect the logic interface to the customer control equipment
If operating the DX 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
). When making the
electrical connections to the DX pump described in the following sections, refer to
for full details of the logic
interface connector pins.
The DX pump can be controlled using a hardware parallel control interface and via commands sent over a serial
interface.
If the DX pump is controlled using the hardware Parallel Interface, refer to
for more information. If the
Serial Interface is used, see the instructions given in
. The logic interface provides the facility to work in
either Parallel or Serial control modes, however, commands cannot be sent in both modes simultaneously (refer to
).
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 DX pump. If an isolation device
is not provided, it will not be possible to switch off the DX pump in an emergency.
WARNING
Incorporate a suitable fuse or current limiting device, as specified in
, in the 24 V
supply line to the DX pump. If a fuse is not provided and a fault develops, the DX pump may develop
a hazardous surface temperature or present a fire hazard.
WARNING
Do not exceed the maximum supply voltage. Excessive supply voltage will cause permanent
damage to the control electronics and may result in a mechanical hazard in some failure
conditions.
