Connections; Signal Cable Preparation; Signal Cable Connection - Remote Sensors; Environmental Protection - ABB AquaMaster4 Manual

A Q U A M A S T E R 4 | E L E C T R O M A G N E T I C F LO W M E T E R F L A N G E D S E N S O R | O I/ F E W 4 0 0/ F R V - E N R E V. A

Connections

DANGER – SERIOUS DAMAGE TO HEALTH
• The mains / line-powered transmitter option is
not fitted with a switch – an isolator such as a
switch or circuit breaker conforming to local
safety standards must be fitted to the final
installation. It must be fitted in close proximity to
the transmitter, within easy reach of the operator
and marked clearly as the isolation mechanism for
the transmitter.
• Remove all power from supply, relay, any powered
control circuits and high common mode voltages
before accessing or making any connections.
• All connections to secondary circuits must have
insulation to required local safety standards. After
installation, there must be no access to live parts.
Use screened cable for signal inputs and relay
connections. Route signal leads and power cables
separately, preferably in an earthed (grounded)
flexible metal conduit.
• Maintain Environmental Protection at all times –
see Figure 38.

Signal cable preparation

To prepare the cable for connection at the transmitter and sensor
terminal blocks:
• Remove the outer cable insulation and Mylar® wrap.
• Cut the cable connection wires to the lengths shown.
• Ensure the drain wire is sleeved.
• Twist the three screen wires together and sleeve them.
• Keep cable pairs twisted.
• Make connections only as shown.
• Conduit connections must provide cable entry sealing.
Signal cable connection – remote sensors
Drain / Screen wire for M20 gland
Drain / Screen
to internal earth
for NPT gland
Signal cable connections

Environmental protection

Figure 38 Potting the sensor terminal box
WARNING
• Potting materials are toxic. Read the manufacturers'
instructions carefully before preparing the potting
material and use suitable safety precautions.
• Power up and check all connections before potting.
• The remote sensor terminal box connections must be
potted immediately on completion to prevent the
ingress of moisture.
• Do not overfill or allow the potting material to come
into contact with 'O' rings or grooves.
• Do not let potting material enter conduit (if used).
33
7 Violet
6 Blue
5 Green
Cut cables to
4 Yellow
60 mm (2.35 in.)
3 Orange
2 Red
1 Brown