Emerson Rosemount 1057 Quick Start Manual page 17

February 2022
3.3.2 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
NO4
COM4
NC4
3.3.3 Wire sensor to transmitter
Procedure
1. Wire the correct sensor leads to the main board using the lead
locations marked directly on the board.
2. After wiring the sensor leads, carefully slide the wired board fully into
the enclosure slot and take up the excess sensor cable through the
cable gland.
When wiring a pH/ORP sensor to the transmitter, follow this order:
1. Wire TB3/RTD to the return, sense, and RTD in terminals.
2. Wire TB2/reference and solution ground to the reference in,
reference shield, and solution ground terminals.
Quick Start Guide
Relay 1
Relay 2
Relay 3
Relay 4
Quick Start Guide
17