User’s & Technical Manual –
LEVEL TRANSMITTER LTR7000
GELEC
Industrial Electronics
PAGE
12
SW1/SW2
switches
(
mA
output range selection)
With SW1/SW2 switches you can select the
mA
output range at terminals
#3
(+)
/
#4
(COM)
.
4 -
20 mA → SW1 : OFF , SW2 : OFF
(default)
0 -
20 mA → SW1 : OFF , SW2 : ON
4 -
21 mA → SW1 : ON , SW2 : OFF
When this mA output setting is selected, the V output does
n’
t have a normal behavior.
Do not use V output when this mA setting is selected.
--- Do not set both SW1/SW2 to ON ---
This setting is used only in manufacturing stages and can lead to device malfunction.
SW3 switch
(
V
output range selection)
With SW3 switch you can select the
Volt
output range at terminals
#5
(+)
/
#4
(COM)
.
0 -
10 V → SW3 : OFF
(default)
0 -
5 V → SW3 : ON
Ensure that the mA output range is not set to 4-21mA setting (SW1: ON / SW2: OFF).
V output doesn’t have a normal behavior with this mA setting selected and cannot be used.
SW4 switch
(Output value during
ERROR
state)
With SW4 switch you can select the output value during
ERROR
state, according to the
selected output range. Refer to the ERROR section in this manual, for more information
about the possible errors.
4-20mA
0-20mA
4-21mA
0-10V
0-5V
SW4 : OFF
(default)
4 mA
0 mA
4 mA
0 V
0 V
SW4 : ON
24 mA
*
24 mA
*
24 mA
*
10 V
5 V
*
You can exploit the ‘
out of range
’ 24mA output for
ERROR
recognition from your PLC,
when the dedicated
ERROR OUTPUT
cannot be used due to application restrictions.
This is an actual advantage only for mA output ranges. For the V output ranges, the output
value options are within the measuring range and cannot be utilized. Though, you can
choose between minimum and maximum output, according to your application needs.
