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AL-AX
Power Supply
- +
Dangerous zone
Output
5Vdc 0.2A
Power Supply
AL-AX
Input
115/230 Vac
Safe zone
L
N
115/230 Vac
Power Supply
POWER SUPPLY OF THE UNIT
The circuit board is powered via an AL-AX certified power unit
(100 ÷250 VAC / 5VDC) or a 6V battery via AL-BX barrier. Both
the power unit and the battery should be located in a safe zone
or, if located in a Dangerous Zone, should be contained within a
separately certified ATEX enclosure.
The unit is powered through terminals 1 and 2 of connector J1. The
power cable should be fed separately from other cables.
Ensure that appropriate grounding is available.
Power supply voltage: 5 VCC ±15%, max 2W
LOAD CELL CONNECTION
The cells' cable should not be fed together with other cables, but
should follow its own separate path.
Up to 4 350-ohm cells can be connected in parallel with the unit.
The cells' power supply voltage is 3.3 VCC, with protection from
temporary short circuits.
The measurement field of the unit provides for using load cells with
maximum 3.9 mV/V sensitivity.
The load cells' cable should be connected with terminals 1 to 6 of
connector J11. In case of 4-conductor cell cable, bridge terminal 1
with 4 and terminal 2 with 3.
Connect the cells' cable shield with terminal 1 of connector J11.
If two or more load cells are used, use specific junction boxes
(CEM4/E ATEX or CSG4/C ATEX), connected as shown below.
Page 7
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