E3A-MA3A-H11 Datasheet, PDF (13/48 Pages) Magnetrol International, Inc. – Digital E3 Modulevel with HART® and PACTware™ Communications Liquid Level Displacer Transmitter

(-) negative
(+) positive
+
Power Supply
24 VDC
–
–
Test
Cu^Cr^ur^re^renⁿt^{t M}M^ee^tet^rer
+
Protective Conductor Terminal
Figure 10
G.P./I.S./Explosion Proof Model
2.5.2 Intrinsically Safe
An intrinsically safe (IS) installation potentially has flamma-
ble media present. An approved IS barrier must be installed
in the non-hazardous (safe) area. Consult factory for agency
drawing.
To install Intrinsically Safe wiring:
1. Make sure the IS barrier is properly installed in the safe area
(refer to local plant or facility procedures). Complete the
wiring from the barrier to the E3 transmitter.
2. Remove the cover to the wiring compartment of the trans-
mitter. Install the conduit plug in the unused opening. Use
PTFE tape/sealant to ensure a liquid-tight connection.
3. Install a conduit fitting and pull the supply wires.
4. Connect shield to an earth ground at power supply.
5. Connect an earth ground wire to the nearest green ground
screw.
6. Connect the positive supply wire to the (+) terminal and the
negative supply wire to the (-) terminal.
7. Replace the cover to the wiring compartment of the
transmitter.
2.5.3 Explosion Proof
Explosion Proof (XP) is a method of designing equipment
for installation in hazardous areas. A hazardous location is
an area in which flammable gases or vapors are, or may be,
present in the air in quantities sufficient to produce explo-
sive or ignitable mixtures. The wiring for the transmitter
must be contained in Explosion Proof conduit extending
into the safe area. See Agency Approvals, Section 3.4.
To install Explosion Proof wiring – Integral mount:
Due to the specialized design of the integral E3 transmitter, no
Explosion Proof conduit fitting (EY seal) is required within
18" of the transmitter. An Explosion Proof conduit fitting
(EY seal) is required between the hazardous and safe areas.
1. Install Explosion Proof conduit from the safe area to the
conduit connection of the E3 transmitter (refer to local
plant or facility procedures).
2. Remove the cover to the wiring compartment of the
transmitter.
3. Connect shield to an earth ground at the power supply.
4. Connect an Earth ground wire to the nearest green ground
screw per local electrical code. Use a minimum 18 AWG
rated up to 85° C.
5. Connect the positive supply wire to the (+) terminal and the
negative supply wire to the (-) terminal.
6. Replace the cover to the wiring compartment of the
transmitter before applying power.
48-635 E3 Modulevel Displacer Level Transmitter
13