Instruction manual

18 RFT9739 Field-Mount Transmitter Instruction Manual
Power-Supply and Sensor Wiring
continued
4.2 Power supply and
grounding
Power-supply options
The AC transmitter accepts an 85 to 250 VAC power supply. The DC
transmitter accepts a 12 to 30 VDC power supply.
• A label inside the power-supply wiring compartment indicates the
correct power-supply voltage.
•
Figure 4-3
(next page) shows the location of power-supply wiring
terminals in the base of the transmitter housing.
• A lockout clamp on the transmitter housing (see
Figure 4-2
, page 17)
provides secondary protection against accessing the power-supply
terminals, and is required by CENELEC.
Wiring
To install power-supply wiring, follow these steps:
1. To access power-supply wiring, unlatch the hinged cover of the
module, then remove the partition that separates intrinsically safe
sensor wiring from non-intrinsically safe output wiring.
2. Make input power connections at the two labeled terminals, as
indicated in
Figure 4-3
(next page). The power supply terminals are
labeled as follows:
• If the terminals are labeled "L" (line) and "N" (neutral), install an
85 to 250 VAC power supply.
• If the terminals are labeled "+" (positive) and "–" (negative), install a
12 to 30 VDC power supply.
3. Ground the transmitter as instructed on page 19.
CAUTION
Incorrect voltage, or installation with power supply on,
will cause transmitter damage or failure.
• Turn off power before installing transmitter.
• Match power-supply voltage with voltage indicated in
transmitter power terminals compartment.