Electrical Wiring - Emerson Rosemount Analytical 1054B C Instruction Manual

MODEL 1054B C
2.4 ELECTRICAL WIRING. The Model 1054B has
three conduit openings in the bottom rear of the ana-
lyzer housing which will accommodate 1/2-inch con-
duit fittings. From the front view, the conduit opening
on the left is for sensor wiring; the center is for signal
output and the opening on the right is for timer, alarm,
and AC connections. Sensor wiring should always be
run in a separate conduit from power wiring. AC
power wiring should be 14 gauge or greater.
NOTE
For maximum EMI/RFI protection the
output cable should be shielded and
enclosed in an earth grounded, rigid
metal conduit. When wiring directly to
the instrument connect the output
cable's outer shield to the transmitter's
earth ground via terminal 8 on TB3.
When wiring to the wall mounting junc-
tion box connect the output cable's outer
shield to the earth ground terminal on
TB-A.
The sensor cable should also be shield-
ed. When wiring directly to the instru-
ment connect the sensor cable's outer
shield to the transmitter's earth ground
via terminal 8 of TB-2. If the sensor
cable's outer shield is braided an appro-
priate metal cable gland fitting may be
used to connect to braid to earth ground
via the instrument case. When wiring to
the wall mounting junction box connect
the sensor cable's outer shield to the
earth ground terminal on TB-A.
The user must provide a means to dis-
connect the main power supply in the
form of circuit breaker or switch. The cir-
cuit breaker or the switch must be locat-
ed in close proximity to the instrument
and identified as the disconnecting
device for the instrument.
2.4.1 Power Input Wiring. The Model 1054B can be
configured for either 115 VAC or 230 VAC power.
Connect AC power to TB1-8 and -9 (115 VAC) or TB1-
7 and -8 (230 VAC) ground to the ground terminal at
TB3-8 (refer to Figure 2-6).
6
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CAUTION
The sensitivity and stability of the analyzer
will be impaired if the input wiring is not
grounded. DO NOT apply power to the
analyzer until all electrical connections are
verified and secure. The following precau-
tions are a guide using UL 508 as a safe-
guard for personnel and property.
1. AC connections and grounding must be in compli-
ance with UL 508 and/or local electrical codes.
2. The metal stiffener is required to provide support
and proper electrical continuity between conduit
fittings.
3. This type 4/4X enclosure requires a conduit hub
or equivalent that provides watertight connect,
REF UL 508-26.10.
4. Watertight fittings/hubs that comply with the
requirements of UL 514B are to be used.
5. Conduit hubs are to be connected to the conduit
before the hub is connected to the enclosure, REF
UL 508-26.10.
6. If the metal support plate is not used, plastic fit-
tings must be used to prevent structural damage
to the enclosure. Also, appropriate grounding lug
and awg conductor must be used with the plastic
fittings.
2.4.2 Output Wiring. The signal output and alarm
connections are made to terminals 1 through 6 of TB1
and TB3-1 and 2. (Refer to Figure 2-6).
SECTION 2.0
INSTALLATION