SIGNAL RELAY
The LIT25 Relay is rated 1ampere, 24VDC, 120/240VAC. It includes an
internally connected noise suppressor or “snubber” with 25K ohms impedance.
Very low AC electrical loads may appear to “leak” current.
Maximum leakage is:
10mA @ 110VAC
20mA @ 220VAC
No leakage will be measured with DC electrical loads.
RELAY OPERATION CHOICE
The LIT25’s Signal Relay can be configured to operate as:
ROC1
= Level Alarm
ROC2
= Level + Echo Loss Alarm
ROC3
= Echo Loss only Alarm
ROC4
= Temperature Alarm (measured at the Sensor)
ROC5
= OFF (de-energize) at all times
Press
Ç
to select the
ROC
.
RELAY CALIBRATION
ROC1
(Level Alarm)
ROC2
(Level + Echo Loss Alarm) - Relay will be energized when the Relay ON set point is
reached.
or
if the echo is lost (no echoes for more than 20 seconds).
ROC4
(Temperature Alarm) -
Minimum Set Point -40
°
C (= -40
°
F)
-
Maximum Set Point 100
°
C (= 212
°
F)
NOTE: The Set Points are displayed in the units selected at
CALU
. Two different Set Points (
RON
and
ROFF
) allows a Relay “deadband” for Pump Control and to avoid Relay chatter.
Page 10
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
RELAY
(1 AMP)
INTERNALLY
CONNECTED
SUPPRESSOR
Ç
Ç
Ç
ROC2
ROC3
ROC4
È
ROC = 3,5
È
È
ROC = 1,2,4
È
È
È
È
721.3
721.2
721.1
Ç
Ç
Ç
0.0
0.1
0.2
The Display will alternate between
every 3 seconds
È
Ç
and
