Emerson Rosemount 3051S Series Reference Manual page 40

Configuration
October 2018
The transmitter will also drive the output to configured saturation values if the applied pressure goes
outside the 4–20 mA range values.
The transmitter will drive its output low or high based on the position of the alarm switch. See
the device" on page
Note
The failure mode alarm direction can also be configured using the Field Communicator or AMS Device
Manager if hardware switches are not present. See
page
Rosemount 3051S Transmitters have three configurable options for failure mode alarm and saturation
levels:
Rosemount (Standard), see

NAMUR, see

Custom, see

Table 2-1. Rosemount (Standard) Alarm and Saturation Values
Level
Low
High
Table 2-2. NAMUR-Compliant Alarm and Saturation Values
Level
Low
High
Table 2-3. Custom Alarm and Saturation Values
Level
Low
High
Per Table
values and between 20.1 and 23.0 mA for high values. The following limitations exist for custom levels:
Low alarm level must be less than the low saturation level

High alarm level must be higher than the high saturation level

High saturation level must not exceed 21.5 mA

Alarm and saturation levels must be separated by at least 0.1 mA

The Field Communicator or AMS Device Manager will provide an error message if a configuration rule is
violated.
30
59.
31.
Table
Table 2-2.
Table 2-3.
4–20 mA saturation
3.9 mA
20.8 mA
4–20 mA saturation
3.8 mA
20.5 mA
4–20 mA saturation
3.7 — 3.9 mA
20.1 — 21.5 mA
2-3, custom alarm and saturation levels can be configured between 3.4 and 3.9 mA for low
"Alarm and saturation level configuration" on
2-1.
4–20 mA alarm
≤ 3.75 mA
≥ 21.75 mA
4–20 mA alarm
≤ 3.6 mA
≥ 22.5 mA
4–20 mA alarm
3.4 — 3.8 mA
20.2 — 23.0 mA
Reference Manual
00809-0100-801, Rev HA
"Wiring
Configuration