5
Federal Signal
signaling.fedsig.com
application. It is recommended that all cables and cores
should be fully identified. Use the appropriate cable gland
for the application. Gland entry threads are M20-1.5 x 6H.
Tools needed:
•
1.5 mm A/F hexagon key
•
2 mm flat-tip screwdriver
•
No. 1 Phillips
®
screwdriver
•
Wire stripper
Wiring the Ex d Models
To wire the Ex flameproof beacon:
1.
Unscrew the M3 hex set screw on the side of the
housing one full turn.
2.
2. Remove the lens cover from the housing
by turning the cover counterclockwise. Three
120-degree spaced reliefs are provided for a 3/8"
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
printed circuit board (PCB).
4.
Slide out the PCB until the terminals clear the
housing. Strip the wire insulation 8 mm (0.31").
Maximum screw tightening torque is 0.6 Nm
(5 in-lb).
24 Vdc Models
a.
Connect the positive (+) power source wire
to the terminal-block screw . See
Figure 8.
Figure 8 IN/OUT PCB connections for Ex d 24 Vdc
J1
GND
GND
+
-
+
-
b.
Connect the negative (-) power source wire to
the terminal block screw marked -.
c.
Connect the earth ground wire to the terminal
block pole marked -GND.
120-240 Vac Models
To wire the Ex d Vac flameproof beacon:
a.
Connect the line (hot) power source wire to
the terminal block screw marked L1 on the
PCB. See Figure 9.
Figure 9 IN/OUT PCB connections for Ex d 120-240 Vac
J1
GND
GND
L1 L2
L2
L1
b.
Connect the neutral (common) power source
wire to the terminal block screw marked L2.
c.
Connect the ground wire to the terminal block
clamp marked GND.
5.
Insert the PCB into the enclosure and fully tighten
the PCB captive screw.
6.
Place the cover on the housing and tighten it by
turning it clockwise.
7.
To ensure O-ring compression, the cover must be
fully seated against the housing when the threads
are tightened. Turn the M3 set screw on the side of
the housing until the screw contacts the housing.
8.
Ensure that the unused wire entries are sealed with
the provided brass M20-1.5 x 6 g stopping plug
(equipment-certified).
9.
9. Test the beacon for proper operation.
Preparing to Wire the Ex de Increased Safety
Models
SHOCK HAZARD: To avoid electrical shock hazards,
do not connect wires when power is applied. Failure to
observe this warning may lead to serious injury or death.
This section has wiring instructions for the two increased
safety models:
•
G-LED 24 Vdc
•
G-LED 120-240 Vac
Ex de units are supplied with a six-pole spring tension
clamp style terminal block. The maximum wire gauge
is 4.0 mm2 (12 AWG). The wire must be rated 85 °C or
higher. Use only stranded cable to terminate the beacon.
The crosssectional area of the primary earth (ground)
must equal the cross-sectional area of the phase
conductor.
Cable termination should be in accordance with
specifications applying to the application. It is
recommended that all cables and cores should be
fully identified. Use the appropriate cable gland for the
application. Gland entry threads are M20-1.5 6H.
Conductive metalwork, including cable glands, must be a
minimum of 5 mm away from the terminals.
