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April 2020
2.1.4
Alarm relays
Emerson supplies four alarm relays with the switching power supply (85 to
264 Vac, 03 order code) and the 24 Vdc power supply (20 - 30 Vdc, 02 order
code). You can use all relays for process measurement(s) or temperature.
You can also configure any relay as a fault alarm instead of a process alarm.
In addition, you may configure any relay independently and program it to
activate pumps or control valves.
As process alarms, alarm logic (high or low activation or USP*) and
deadband are user-programmable. Customer-defined failsafe operation is
supported as a programmable menu function to allow all relays to be
energized or not energized as a default condition upon powering the
transmitter. You may program the USP* alarm to activate when the
conductivity is within a user-selectable percentage of the limit. USP*
alarming is available only when a contacting conductivity measurement
board is installed.
2.2
Prepare conduit openings
The transmitter enclosure has six conduit openings. Four conduit openings
are fitted with conduit plugs.
Conduit openings accept ½-in. conduit fittings or PG 13.5 cable glands. To
keep the case watertight, block unused openings with NEMA
conduit plugs.
Note
Use watertight fittings and hubs that comply with your requirements.
Connect the conduit hub to the conduit before attaching the fitting to the
transmitter.
2.3
Prepare sensor cable
The Rosemount T56 is intended for use with all Rosemount sensors. Refer to
the sensor installation instructions for details on preparing sensor cables.
2.4
Power, output, and sensor connections
2.4.1
Power wiring
Emerson offers two power supplies for the Rosemount T56
1. 24 Vdc (20-30 V) power supply (02 ordering code)
2. 85-265 Vac switching power supply (03 ordering code)
AC mains (115 or 230 V) 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 marked clearly on the power supply
board. Wire the power leads to the power supply board using the lead
markings on the board.
Quick Start Guide
Quick Start Guide
®
4X or IP65
23
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