Instruction manual

RFT9739 Rack-Mount Transmitter Instruction Manual 17
Output Wiring Startup TroubleshootingBefore You Begin Getting Started Mounting
Power-Supply and
Sensor Wiring
4 Power-Supply and Sensor
Wiring
4.1 General guidelines
• Terminal blocks may be unplugged from the transmitter back panel for
easier installation of wiring.
• Install cable and wiring to meet local code requirements.
• A switch may be installed in the power-supply line. For compliance with
low-voltage directive 73/23/EEC, a switch in close proximity to the
transmitter is required for AC-powered transmitters.
• Do not install AC power cable or unfiltered DC power cable in the same
conduit or cable tray as sensor cable or output wires.
4.2 Power supply and
grounding
Power-supply options
• The transmitter is configured at the factory for a 110/115 or
220/230 VAC power supply. A label in the upper corner on the
transmitter's back panel indicates the configured power-supply voltage.
See
Figure 4-1
, page 18.
• Any RFT9739 rack-mount transmitter can accept a DC power supply,
whether or not the back panel indicates the transmitter has been
configured for AC power.
• To change power-supply voltage from the configured voltage, see
Section 4.3
, page 21.
WARNING
Failure to comply with requirements for
intrinsic safety if the sensor is installed in a hazardous
area could result in an explosion.
Sensor wiring is intrinsically safe.
• Install the transmitter in a non-hazardous area.
• For intrinsically safe sensor installations, use this
document with Micro Motion UL or CSA installation
instructions.
• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not apply.
CAUTION
Incorrect voltage, or installation with power supply on,
will cause transmitter damage or failure.
• Match power-supply voltage with voltage indicated on
transmitter back panel. See
Figure 4-1
, page 18.
• Turn off power before installing transmitter.