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Wiring the Ex d Models
To wire the Ex d flameproof sounder:
1.
Unscrew the M3 hex set screw on the side of the housing one full turn.
2.
Remove the cover from the housing by turning the cover counterclockwise. Three 120-degree spaced reliefs are
provided for a 3/8-inch spanner wrench if needed. If the cover will not unscrew, back out the set screw a few
additional turns.
3.
Loosen the captive Phillips screw retaining the driver/printed circuit board (PCB).
4.
Slide out the PCB until the terminals clear the housing. Strip the wire insulation 6.5 mm (0.25 in). Maximum screw
tightening torque is 0.5 N•m (4.5 in-lb).
5.
Follow the instructions starting below for your line voltage and continue to Step 6 on page 6. Refer to Figure 6 for
the voltage selector switch and Table 1 on page 8 for the tone chart. For remote tone selection, refer to Table
5 on page 13.
220-240 Vac Operation (no remote switching of tones)
a.
Set the voltage selector switches to 230 and AC.
b.
Turn the tone selector switch to the desired tone.
c.
Connect the line (hot) power source wire to the terminal block position marked L1 on the PCB.
d.
Connect the neutral (common) power source wire to the terminal block position marked L2 on the PCB.
e.
Connect ground wire to the terminal block position marked EARTH.
6
Figure 6 Ex d in/out PCB connections
D8
D7
D6
D5
T4
T3
T2
T1 SEL EARTH L2
Figure 7 Locations of tone and volume switches
TONE
SELECTOR
SWITCH
VOLTAGE
SELECTOR
SWITCH
R1
D4
D2
DC
120
S1
S2
AC
230
D1
D3
F2
F1
J1
L2
L1
L1
CONTROL: FULL
CLOCKWISE
= MAX. VOLUME
VOLUME
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