Emerson Rosemount 1057 Quick Start Manual page 12

Single channel transmitter

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Quick Start Guide

Figure 3-3: Switching AC Power Supply (03 Ordering Code)

This power supply automatically detects AC line conditions and switches to

the proper line voltage and line frequency.

Four programmable relays are included.

3.3.2

HART

3.3.3

Alarm relay wiring

Emerson supplies four alarm relays 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. .

Figure 3-4: 4-24 Vdc Power Supply (02 ordering code)

NO1

COM1

NC1

NO2

COM2

NC2

NO3

COM3

NC3

current output wiring

Relay 1

Relay 2

Relay 3

September 2018

Rosemount 1057

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