Emerson Rosemount 56 - Power, Output, and Sensor Connections

3.2 Preparing Conduit Openings
T
here are six conduit openings in all configurations of 56 analyzer. (Note that four of the
openings will be fitted with plugs upon shipment.)
Conduit openings accept 1/2-inch conduit fittings or PG13.5 cable glands. To keep the case
watertight, block unused openings with Type 4X or IP66 conduit plugs.
NOTE:
U
se watertight fittings and hubs that comply with your requirements. Connect the conduit hub to the
conduit before attaching the fitting to the analyzer.
3.3 Preparing Sensor Cable
The 56 is intended for use with all Rosemount sensors. Refer to the sensor installation
instructions for details on preparing sensor cables.
3.4 Power, Output, and Sensor Connections
3.4.1 Power wiring
Two Power Supplies are offered for the 56:
a. 24 VDC (20 – 30V) Power Supply (-02 order code)
b. 85 – 265 VAC Switching Power Supply (-03 order code)
AC mains leads and 24 VDC leads are wired to the Power Supply board which is mounted vertically
on the left side of the main enclosure cavity. Each lead location is clearly marked on the Power
Supply board. Wire the power leads to the Power Supply board using the lead markings on the
board.
The grounding plate is connected to the earth terminal of the -03 order code (85-265 VAC)
power supply. The green colored screws on the grounding plate are intended for connection
to some sensors to minimize radio frequency interference. The green screws are not
intended to be used for safety purposes.
3.4.2 Current output wiring
All instruments are shipped with four 4-20 mA current outputs. Wiring locations for the
outputs are on the Main board which is mounted on the hinged door of the instrument. Wire
the output leads to the correct position on the Main board using the lead markings
(+/positive, -/negative) on the board. Male mating connectors are provided with each unit.
3.4.3 Alarm relay wiring
Four alarm relays are supplied with the switching power supply (85 to 265 VAC, -03 order code)
and the 24 VDC power supply (20-30 VDC, -02 order code). Wire the relay leads on each of the
independent relays to the correct position on the power supply board using the printed lead
markings (NO/Normally Open, NC/Normally Closed, or Com/Common) on the board.
22 Wiring
Section 3: Wiring Instruction Manual
April 2017 LIQ-MAN-56