Flowline LU78 EchoSwitch - Manual (Page 21)

Rev A MN300282 21 of 34
CONFIGURATION (cont.) Step Five
How to Triplex three relays: Triplex enables EchoSwitch® to use three relays to alternate after each cycle
while performing a lead lag‐lag operation. To begin, configure all three relays in the same mode (ex: all relays
are set as PUMPs that FILL or all relays set as PUMPs that EMPTY). Be sure to set all three relay with different
ON Set Point, one for Primary, one for Backup and the other for Backup 2). Setting all three relays with the
same ON level will cause the relays to all turn on at the same time. Example below shows three relays (A, B
and C) used to Auto Empty a tank:
1. Make sure all three relays are in the same mode. If this is not true, then TRIPLX will not appear.
2. In TOP‐LEVEL MENU mode, select M‐PLEX.
3. Select TRIPLX.
4. Select EXIT to return to TOP‐LEVEL MENU.
How to turn off M‐PLEX (DUPLEX or TRIPLEX)
1. In TOP‐LEVEL MENU mode, select M‐PLEX.
2. Select NO ALT.
3. Select EXIT to return to TOP‐LEVEL MENU.