Emerson Rosemount 3490 Series Reference Manual page 93

Reference Manual
00809-0100-4841
4.4.13 Set-up the relays
An overview of the relay functions
Relays 1 to 4 are normally On Point/Off Point control relays which may be used to start/
stop pumps or open/close valves at different level points. The relay energizes at one level
point and then de-energizes at a different level point.
Relays can also be programmed as Out-of-limit Alarm relays which energize between
defined points and de-energize outside those points. The relays may also be programmed
to perform auto-sequences and auxiliary functions such as pump-down operations, pump
rotations to equalize wear, and de-sludge/cleaning.
Relay 5 is normally a Fail-safe Fault relay but may be re-allocated to another duty
Related information
Other relay modes
Start and use the relay wizard
Relays can be programmed easily using the Relay Wizard, accessible by navigating to the
RELAY menu. The Relay Wizard also forms a part of the Application (App) Wizard.
Procedure
Navigate to SETUP → [CONTROLLER] → OUTPUT → RELAY → Relay Wizard.
Example
The Rosemount 3491 screens are shown here.
SETUP
Run App?
MONITOR
The SELECT INSTRUMENT menu does not appear unless a HART transmitter is connected.
Emerson.com/Rosemount
MAIN MENU
SELECT INSTRUMENT
Controller: ****
# 1
Tx1: ****
APPLICATION
DISPLAY
OUTPUT
SETUP
OUTPUT
CURRENT OUTPUT
RELAY
1
TOTALIZER
Relay Wizard
Reset RL Params
RELAY 1
Getting started
January 2021
RELAY
93