The 4 to 20 mA sensor uses our standard ratiometric sensor, and adds a conversion circuit board to give you the most accurate, lowest cost, and most versatile four wire 4 to 20 mA sensor on the market today.
The load resistance between J3.4 and J3.3 should be between 100 and 500 ohms to ensure proper operation.
The voltage will swing from 2 to 10 volts at J3.3 as the output swings from 4 to 20 mA. J3.3 and J3.4 must be allowed to float. A differential input meter is recommended.
The red and green LED will switch at the 12 mA position within 0.3 mA. This indicates that the sensor is level.
To select a range, other than the factory setting, remove the jumper from J5, J6 or J7 and install a select resistor between J3.5 and J3.6 for various output ranges, calculated as shown: R = (556K / desired range) -10K.
The features of this unique sensor are LED alignment aid, onboard selectable output ranges, infinite remote selectable output ranges and connection for remote LCD readout.
FACTORY JUMPER SETTINGS |
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J5 |
J6 |
J7 |
Nom. output |
Tolerance |
+15 deg | +30 deg | +45 deg | 20.00 mA | 19.7 - 20.3 mA |
+10 deg | +20 deg | +30 deg | 17.33 mA | 17.0 - 17.6 mA |
+5 deg | +10 deg | +15 deg | 14.67 mA | 14.4 - 15.0 mA |
0 deg | 0 deg | 0 deg | 12.00 mA | 11.7 - 12.3 mA |
-5 deg | -10 deg | -15 deg | 9.33 mA | 9.0 - 9.6 mA |
-10 deg | -20 deg | -30 deg | 6.67 mA | 6.4 - 7.0 mA |
-15 deg | -30 deg | -45 deg | 4.00 mA | 3.7 - 4.3 mA |
PIN ASSIGNMENTS |
|
Pin designations |
Description/Function |
J4.1 | 12 Vdc Regulated (out) |
J4.2 | System Ground (out) |
J4.3 | Reference(out) |
J4.4 | Signal (out) |
J3.1 | 24 Volt High (in) |
J3.2 | 24 Volt Low (in) |
J3.3 | 4-20 mA Low (out) |
J3.4 | 4-20 mA High (out) |
J3.5 | Optional Scale Resistor (in) |
J3.6 | Optional Scale Resistor (in) |